DX255LC: Doosan

DX255LC
Operation and Maintenance Manual

K1016584E
Serial Number 5001 and Up
September 2006
DOOSAN reserves the right to improve our products in a continuing process to provide the best possible product
to the market place. These improvements can be implemented at any time with no obligation to change materials
on previously sold products. It is recommended that consumers periodically contact their distributors for recent
documentation on purchased equipment.
This documentation may include attachments and optional equipment that is not available in your machine's
package. Please call your distributor for additional items that you may require.
Illustrations used throughout this manual are used only as a representation of the actual piece of equipment, and
may vary from the actual item.
K1016584E Operation and Maintenance Manual Copyright Doosan 2006

Table of Contents
Safety ..........................................................................................1-1
To the Operator of a DOOSAN Daewoo Excavator ........................... 1-1
Location of Safety Labels................................................................... 1-5
Summary of Safety Precautions for Lifting in Digging Mode............ 1-15
Unauthorized Modifications.............................................................. 1-16
General Hazard Information............................................................. 1-16
Before Starting Engine..................................................................... 1-25
Machine Operation........................................................................... 1-29
Maintenance .................................................................................... 1-36
Battery ............................................................................................. 1-45
Towing.............................................................................................. 1-47
Shipping and Transportation ............................................................ 1-48
Excavator Rated Lift Capacity Tables............................................... 1-49
Operating Controls ....................................................................2-1

Component Locations ........................................................................ 2-4
Operator's Area.................................................................................. 2-6
Operational Controls and Panels ....................................................... 2-8
Instrument Panel.............................................................................. 2-22
Multifunction Gauge and Graphic Information ................................. 2-29
Mode Selector Buttons..................................................................... 2-34
Setting Main Menu ........................................................................... 2-36
Flow Control..................................................................................... 2-45
Operation Selection Display............................................................. 2-47
Heater and Air Conditioner Control Panel........................................ 2-49
Stereo .............................................................................................. 2-55
Miscellaneous Electrical Devices..................................................... 2-57
Seat Adjustment............................................................................... 2-59
K1016584E Table of Contents

I
Ceiling Cover ................................................................................... 2-63
Front Windows ................................................................................. 2-64
Door Side Latch ............................................................................... 2-66
Cabin Storage Compartments ......................................................... 2-67
Ashtray ............................................................................................. 2-67
Sun Visor.......................................................................................... 2-68
Hanger ............................................................................................. 2-68
Cup Holder....................................................................................... 2-69
Door Window Holder ........................................................................ 2-69
Emergency Glass Breaking Tool ...................................................... 2-69
Miscellaneous Access Covers and Doors........................................ 2-70
Operation....................................................................................3-1
To Handle a New Excavator............................................................... 3-1
Starting and Stopping the Engine ...................................................... 3-2
Safety Lever ..................................................................................... 3-13
Travel................................................................................................ 3-14
Operating Instructions...................................................................... 3-20
Operating Precautions ..................................................................... 3-26
Parking Excavator ............................................................................ 3-31
Towing Procedure ............................................................................ 3-32
Hydraulic Breaker ............................................................................ 3-33
Adjusting the Pump Flow ................................................................. 3-38
Operating Techniques ...................................................................... 3-41
Operation Under Unusual Conditions .............................................. 3-43
Inspection, Maintenance and Adjustment...............................4-1

Preventive Maintenance..................................................................... 4-1
Preliminary Work Machine Setup for Maintenance ............................ 4-4
Table of Recommended Lubricants ................................................... 4-6
Fluid Capacities ................................................................................. 4-8
Lubrication and Service Chart ........................................................... 4-8
Maintenance Intervals...................................................................... 4-12

II
10 Hour / Daily Service .................................................................... 4-14
50 Hour / Weekly Service ................................................................ 4-25
250 Hour / Monthly Service ............................................................. 4-28
500 Hour / 3 Month Service ............................................................. 4-35
1,000 Hour / 6 Month Service .......................................................... 4-44
2,000 Hour / Yearly Service.............................................................. 4-51
4,000 Hour / Biennial Service .......................................................... 4-57
12,000 Hour / Six Year Service ........................................................ 4-58
Air-Conditioning System .................................................................. 4-59
Bolt and Nut Inspection.................................................................... 4-60
Bucket .............................................................................................. 4-68
Electrical System ............................................................................. 4-71
Engine Cooling System.................................................................... 4-75
Fuel Transfer Pump (Option) ............................................................ 4-77
Handling of Accumulator.................................................................. 4-80
Track Tension ................................................................................... 4-81
Venting and Priming Hydraulic System............................................ 4-83
Long Term Storage........................................................................... 4-85
Maintenance in Special Conditions.................................................. 4-86
Transportation............................................................................5-1
Loading and Unloading ...................................................................... 5-1
Lifting With Sling ................................................................................ 5-5
Troubleshooting.........................................................................6-1
Electrical System ............................................................................... 6-1
Engine................................................................................................ 6-2
Hydraulic System ............................................................................... 6-3
Swing System .................................................................................... 6-4
Travel System..................................................................................... 6-5
Specification ..............................................................................7-1
Standard Specification ....................................................................... 7-1

III
Overall Dimensions ............................................................................ 7-2
Working Range .................................................................................. 7-3
Approximate Weight of Workload Materials ....................................... 7-4
Index ...........................................................................................8-1
Table of Contents K1016584E

IV
OP000481
1Safety
TO THE OPERATOR OF A
DOOSAN DAEWOO
EXCAVATOR
DANGER!
Unsafe use of the excavator could lead to serious injury
or death. Operating procedures, maintenance and
equipment practices or traveling or shipping methods
that do not follow the safety guidelines on the following
pages could cause serious, potentially fatal injuries or
extensive damage to the machine or nearby property.
Please respect the importance of taking responsibility for

your own safety, and that of other people who may be
affected by your actions.
The safety information on the following pages is organized
into the following sections:
1. “Location of Safety Labels” on page 1-5
2. “Summary of Safety Precautions for Lifting in Digging
Mode” on page 1-15
3. “Unauthorized Modifications” on page 1-16
4. “General Hazard Information” on page 1-16
5. “Before Starting Engine” on page 1-25
6. “Machine Operation” on page 1-29
7. “Maintenance” on page 1-36
8. “Battery” on page 1-45
9. “Towing” on page 1-47
10. “Shipping and Transportation” on page 1-48
11. “Excavator Rated Lift Capacity Tables” on page 1-49
Safety OP000481
1-1
WARNING!
Improper operation and maintenance of this machine
can be hazardous and could result in serious injury or
death.
Operator and maintenance personnel should read this
manual thoroughly before beginning operation or
maintenance.
Keep this manual in the storage compartment to the
rear of the operator's seat, and have all personnel
involved in working on the machine read the manual
periodically.
Some actions involved in operation and maintenance of
the machine can cause a serious accident, if they are
not done in a manner described in this manual.
The procedures and precautions given in this manual
apply only to intended uses of the machine.
If you use your machine for any unintended uses that
are not specifically prohibited, you must be sure that it
is safe for any others. In no event should you or others
engage in prohibited uses or actions as described in
this manual.
DOOSAN delivers machines that comply with all
applicable regulations and standards of the country to
which it has been shipped. If this machine has been
purchased in another country or purchased from
someone in another country, it may lack certain safety
devices and specifications that are necessary for use in
your country. If there is any question about whether
your product complies with the applicable standards and
regulations of your country, consult DOOSAN or your
DOOSAN distributor before operating the machine.
Safety OP000481
1-2
SAFETY ALERT SYMBOL
Be Prepared - Get to Know All Operating and Safety
Instructions.
This is the Safety Alert Symbol. Wherever it appears in
this manual or on safety signs on the machine you
should be alert to the potential for personal injury or
accidents. Always observe safety precautions and follow
recommended procedures.
Learn the Signal Words Used with the

Safety Alert Symbol
The words "CAUTION," "WARNING," and "DANGER" used
throughout this manual and on decals on the machine
indicate degree of risk of hazards or unsafe practices. All
three degrees of risk indicate that safety is involved.
Observe precautions indicated whenever you see the Safety
Alert "Triangle," no matter which signal word appears next to
the "Exclamation Point" symbol.
CAUTION!
This word is used on safety messages and safety labels
and indicates potential of a hazardous situation that, if
not avoided, could result in minor or moderate injury. It
may also be used to alert against a generally unsafe
practice.
WARNING!
and indicates potential of a hazardous situation that, if
not avoided, could result in serious injury or death. It
may also be used to alert against a highly unsafe
practice.
DANGER!
and indicates an imminent hazard of a situation that, if
not avoided, is very likely to cause death or extremely
serious injury. It may also be used to alert against
equipment that may explode or detonate if handled or
treated carelessly.
Safety OP000481
1-3
Safety precautions are described in SAFETY from page 1-5
on.
DOOSAN cannot predict every circumstance that might
involve a potential hazard in operation and maintenance.
Therefore the safety messages in this manual and on the
machine may not include all possible safety precautions. If
any procedures or actions not specifically recommended or
allowed in this manual are used, you must be sure that you
and others can do such procedures and actions safely and
without damaging the machine. If you are unsure about the
safety of some procedures, contact a DOOSAN distributor.
Safety OP000481
1-4
LOCATION OF SAFETY
LABELS
3 5 2
6 1
10
11 9 11 14
13 12 15
16
7 4
FG006900
Figure 1
There are several specific warning signs on this machine.

The exact location of hazards and the description of the
hazards are reviewed in this section.
Please become familiarized with all warning signs.
Make sure that all of the warning signs are legible. Clean
the warning signs or replace the warning signs if you cannot
read the words. Replace the illustrations if the illustrations
are not visible. When you clean the warning signs, use a
cloth, water and soap. Do not use solvent, gasoline, or other
harsh chemicals to clean the safety signs. Solvents,
gasoline, or other harsh chemicals could loosen the
adhesive that secures the warning sign. Loose adhesive will
allow the warning sign to fall off.
Safety OP000481
1-5
Replace any safety sign that is damaged, or missing. If a
safety sign is attached to a part that is replaced, install a
safety sign on the replacement part.
Safety OP000481
1-6
1. Warnings for Operation, Inspection
and Maintenance (190-00688,
190-00092)
AVOID DEATH OR SERIOUS INJURY. - READ AND UNDERSTAND

OPERATION MANUAL AND SAFETY LABELS prior to operating
this machine.
Never get in under the machine while it is being jacked up

with boom and ar m.
Sound the hor n to aler t the people nearby before operating,
and make sure that all persons are clear of area.
Controls may be changed for attachments or operator 190-00092
preference. Tr y control patter n before operating.
190-00688
ARO1080L
2. Warnings for High Voltage

(190-00689, 190-00096)
DANGER
SERIOUS INJURY OR DEATH BY
ELECTROCTION can occur if
machine or attachments are
not a safe distance from electrical
power lines.
Line voltage Safe Distance
6.6 kv At least 3m(10ft)
66.6 kv At least 5m(16ft) 190-00096
275.0 kv At least 10m(33ft)
190-00689
ARO1090L
Safety OP000481
1-7
3. Warnings When Opening a Front
Window (2190-3388, 190-00093)
When raising window,

lock it in place with lock
pins on both sides.
Falling window can cause

injury.
2190-3388
190-00093
FG000665
4. Warnings for a High-pressure

Cylinder (190-00122)
190-00122
ARO1110L
Safety OP000481
1-8
5. Warnings When Adjusting Track
Tension (2190-3386A, 190-00521)
T h e t ra ck a d j u s t e r a d j u s t m e n t a n d h a n d l i n g
The spring in the track adjuster is loaded with great force
and the pressure in the cylinder is very high. For this
reason there is a possibility of an accident which
may involve injury to personnel. It is very dangerous
to make mistakes when performing such an adjustment
or disassembly.
Be sure to read the procedures described in the Operation
and Maintenance Manual carefully before adjusting the
track tension.
2190-3386A
190-00521
ARO1120L
6. Warnings for Leaving Operator's

Seat (190-00693, 190-00094)
Sudden and unwanted machine

movement can cause serious
injury or death.
Always make sure when leaving

operator's seat to :
Lower equipment to the ground.
Move safety lever to LOCK position.
Turn key switch OFF. Remove key
from switch.
190-00693
190-00094
ARO1140L
Safety OP000481
1-9
7. Warnings for Batteries Maintenance
(2190-2533A, 190-00100)
Battery fumes can explode. Keep sparks and flames away

from batteries.
Always avoid storing metals like tools or flammable
materials around or on the batteries. Explosion or fire
can be caused by shortcircuiting batteries.
Surfuric acid in battery is poisonous. It is strong enough
burn skin, eat holes in clothing, and cause blindness
if splashed eyes.
If you spill acid on yourself;
1. Flush your skin with water.
2. Apply baking soda or lime to help neutralize the acid.
3. Flush your eyes with water for 10-15 minutes.
Get medical attention immediately.
2190-2533A 190-00100
ARO1150L
8. Warnings for High Temperature

Hydraulic Oil (190-00691, 190-00097)
HOT OIL CAN CAUSE INJURY OR

BLINDNESS.
To prevent hot oil from spurting out:

Turn engine off
Allow oil to cool
190-00097
Slowly loosen cap to relieve
pressure
190-00691
ARO1160L
Safety OP000481
1-10
9. Warnings for Hot Coolant (190-00692,
190-00097)
HOT COOLANT CAN CAUSE INJURY

OR BLINDNESS.
Never loosen or open radiator cap
when coolant is hot and under
pressure.
To open cap, stop engine, wait until
radiator is cool. Then loosen cap 190-00097
slowly to relieve the pressure.
190-00692
ARO1170L
10. Warnings for Handling an

Accumulator (190-00703, 190-00099)
Keep away from flame.

Do not weld on, or drill
into the accumulator.
EXPLOSION HAZARD
190-00703
190-00099
ARO1180L
Safety OP000481
1-11
11. Warnings for Rotating Parts
(190-00694, 190-00095, 190-00557)
190-00095
Rotating par ts can cause

personal injur y.
Keep away from fan and
belt when engine is run-
ning. Stop engine before
ser vicing.
190-00694 190-00557
ARO1190L
12. Warning Tag - Used When Inspection

and Maintenance (190-00695,
190-00098)
WARNING
DO NOT OPERATE
when performing inspection
or maintenance
190-00695
190-00098
ARO1200L
Safety OP000481
1-12
13. Warning for a Hot Surface
(190-00648A)
190-00648
ARO1210L
14. Caution for Hood (190-00522)
190-00522
ARO1220L
Safety OP000481
1-13
15. Keep Out of the Swing Area
(2190-3379, K1008571)
2190-3379
K1008571
FG000180
16. Warnings for Front Attachments

(190-00652)
190-00652
ARO1230L
Safety OP000481
1-14
SUMMARY OF SAFETY
PRECAUTIONS FOR LIFTING IN
DIGGING MODE
DANGER!
Unsafe use of the excavator while making rated lifts
could cause serious, potentially fatal injuries or
extensive damage to the machine or nearby property.
Do not let anyone operate the machine unless they've
been properly trained and understand the information in
the Operation and Maintenance Manual.
To lift safely while in Digging Mode, the following items must

be evaluated by the operator and the work site crew.
• Condition of ground support.
• Excavator configuration and attachments.
• Weight, lifting height and lifting radius.
• Safe rigging of the load.
• Proper handling of the suspended load.
Tag lines on opposite sides of the load can be very helpful
in keeping a suspended load secure, if they are anchored
safely to control points on the ground.
WARNING!
NEVER wrap a tag line around your hands or body.
NEVER rely on tag lines or make rated lifts when wind
gusts are more than 48.3 km/h (30 MPH). Be prepared
for any type of wind gust when working with loads that
have a large surface area.
Always engage the "Digging Mode" control on the Instrument

Panel before using the excavator for lifting work.
WARNING!
If you need more information or have any questions or
concerns about safe operating procedures or working
the excavator correctly in a particular application or in
the specific conditions of your individual operating
environment, please consult your local DOOSAN
representative.
Safety OP000481
1-15
UNAUTHORIZED
MODIFICATIONS
Any modification made without authorization or written
approval from DOOSAN can create a safety hazard, for
which the machine owner must be held responsible.
For safety's sake, replace all OEM parts with the correct
authorized or genuine DOOSAN part. For example, not
taking the time to replace fasteners, bolts or nuts with the
correct replacement parts could lead to a condition in which
the safety of critical assemblies is dangerously compromised.
GENERAL HAZARD
INFORMATION
Safety Rules
Only trained and authorized personnel can operate and
maintain the machine.
Follow all safety rules, precautions and instructions when
operating or performing maintenance on the machine.
Do not operate the machine if you are not feeling well, if
you are taking medication that makes you feel sleepy, if you
have been drinking, or if you are suffering from emotional
problems. These problems will interfere with your sense of
judgement in emergencies and may cause accidents.
When working with another operator or with a person on
work site traffic duty, be sure that all personnel know the
nature of the work and understand all hand signals that are
to be used.
Always observe strictly any other rules related to safety.
Safety Features
Be sure that all guards and covers are installed in their
proper position. Have guards and covers repaired
immediately if damaged.
Be sure that you understand the method of use of safety
features such as safety lock lever and the seat belt, and
use them properly.
Never remove any safety features. Always keep them in
good operating condition.
Failure to use safety features according to the instructions in
the Operation and Maintenance Manual could result in
serious bodily injury.
Safety OP000481
1-16
Inside Operator's Compartment
When entering the operator's compartment, always remove
all mud and oil from the soles of your shoes. If you operate
the travel pedal with mud or oil stuck to your shoes, your
foot may slip and this may cause a serious accident.
After using the ashtray, make sure that any matches or
cigarettes are properly extinguished, and be sure to close
the ashtray. If the ashtray is left open, there is danger of
fire.
Do not stick suction pads to the window glass. Suction pads
act as a lens and may cause fire.
Do not leave lighters laying around the operator's
compartment. If the temperature inside the operator's
compartment becomes high, there is danger that the lighter
may explode.
Do not use cellular telephones inside the operator's
compartment when driving or operating the machine.
There is danger that this may lead to an unexpected
accident.
Never bring any dangerous objects such as flammable or
explosive items into the operator's cabin.
To ensure safety, do not use the radio or music
headphones when operating the machine. There is danger
that this may lead to a serious accident.
When operating the machine, do not put your hands or
head out of the window.
When standing up from the operator's seat, always place
safety lock lever securely in the "LOCK" position. If you
accidentally touch the work equipment levers when they are
not locked, the machine may suddenly move and cause
serous injury or damage.
When leaving the machine, lower the work equipment
completely to the ground, set safety lock lever to the
"LOCK" position and shut down engine. Use the key to lock
all the equipment. Always remove the key and take it with
you.
Clothing and Personal Protective Items

Contain long hair, and avoid loose clothing and jewelry.
They can catch on controls or in protruding parts and cause
serious injury or death.
Do not wear oily clothes. They are highly flammable.
Full eye protection, a hard hat, safety shoes and gloves
may be required at the work site.
While working on the machine, never use inadequate tools.
They could break or slip, causing injury, or they may not HAOA020L
adequately perform intended functions. Figure 2
Safety OP000481
1-17
Breathing Masks, Ear Protection May Be
Required
Do not forget that some risks to your health may not be
immediately apparent. Exhaust gases and noise pollution
may not be visible, but these hazards can cause disabling
or permanent injuries.
NOTE: The equivalent continuous A-weighted sound
pressure level at the workstation for this machine is
71 dB(A).
Measurement is obtained on a dynamic machine
following the procedures and cabin conditions as
described in ISO 6396.
NOTE: The guaranteed sound power level emitted by the
machinery for this machine is 103 dB(A).
Measurement is obtained on a dynamic machine with
the procedures as described in 2000/14/EC.
Vibration Level Information

Hands/Arms: The weighted root mean square acceleration to
which the hands/arms are subjected, is less than 2.5 m/s2.
Whole body: The weighted root mean square acceleration to
which the whole body is subjected, is less than 0.5 m/s2.
Measurements are obtained on a representative machine,
using measuring procedures as described in the following
standard: ISO 2631/1. ISO 5349, and SAE J1166.
Recommendations for Limiting

Vibrations
1. Select the right machine, equipment and attachments
for a particular application.
2. Replace any damaged seat by a DOOSAN genuine
part. Keep the seat maintained and adjusted.
• Adjust the seat and suspension for the weight
and size of the operator.
• Inspect and maintain the suspension and
adjustment mechanisms of the seat regularly.
3. Check that the machine is properly maintained.
• Tire pressure, brakes, steering, linkages, etc.
4. Steer, brake, accelerate, shift gears, move the
attachments and load the attachments smoothly.
5. Adjust the machine speed and travel path to reduce
the vibration level.
Safety OP000481
1-18
• Slow down if it is necessary when passing rough
terrain.
• Drive around obstacles and excessive rough
terrain conditions.
6. Keep the terrain on work sites where the machine is
working and traveling in good condition.
• Remove any large rocks or obstacles.
• Fill any ditches and holes.
• Provide machines for and schedule time to
maintain the terrain conditions.
7. Travel over longer distance (e.g. on public roads) at
adjusted (medium) speed.
• Always adjust the speed for preventing bouncing.
Mounting and Dismounting

Before getting on or off the machine, if there is any oil,
grease, or mud on the handrails, steps, or track shoes, wipe
it off immediately. Always keep these parts clean. Repair
any damage and tighten any loose bolts.
Never jump on or off the machine. In particular, never get
on or off a moving machine. These actions may lead to
serious injury.
When getting on or off the machine, always face the
machine, and maintain three-point contact (both feet and
one hand or one foot and both hands) with the handrails,
steps, and track shoes to ensure that you support yourself
securely.
Never hold any control levers when getting on or off the
machine.
Apply the door lock securely. If you grip the handrail inside
the door when moving on top of the track shoes, and the
door lock is not applied securely, the door may move and
cause you to fall.
Use the points marked by arrows in the diagram when
getting on or off the machine.
FG006901
Figure 3
Safety OP000481
1-19
Fuel, Oil and Hydraulic Fluid Fire
Hazards
Fuel, oil and antifreeze will catch fire if it is brought close to
a flame. Fuel is particularly flammable and can be
hazardous.
Always strictly observe the following.
Add fuel, oil, antifreeze and hydraulic fluid to the machine
only in a well ventilated area. The machine must be parked
with controls, lights and switches turned "OFF." The engine
must be "OFF" and any flames, glowing embers, auxiliary
heating units or spark causing equipment must be doused,
turned "OFF" and/or kept well clear of the machine.
Static electricity can produce dangerous sparks at the fuel
filling nozzle. In very cold, dry weather or other conditions Figure 4
that could produce a static discharge, keep the tip of the
fuel nozzle in constant contact with the neck of the fuel
filling nozzle, to provide a ground.
Keep fuel and other fluid reservoir caps tight and do not
start the engine until caps have been secured.
Precautions When Handling Fluids at

High Temperature
Immediately after operations are stopped, the coolant,
engine oil, and hydraulic oil are at high temperature and the
radiator and hydraulic tank are still under pressure.
Attempting to remove the cap, drain the oil or coolant, or
replace the filters may lead to serious burns. Always wait for
the temperature to go down, and follow the specified
procedures when carrying out these operations.
HAOA050L
Figure 5
To prevent hot coolant from spurting out, shut down engine,

wait for the coolant to cool, then loosen the cap slowly to
relieve the pressure.
To prevent hot oil from spurting out, shut down engine, wait
for the oil to cool, then loosen the cap slowly to relieve the
pressure.
HAOA060L
Figure 6
Safety OP000481
1-20
Asbestos Dust Hazard Prevention
Asbestos dust can be HAZARDOUS to your health if it is
inhaled. Materials containing asbestos fiber can be present on
work site. Breathing air that contains asbestos fiber can
ultimately cause serious or fatal lung damage. To prevent lung
damage from asbestos fiber, observe following precautions;
• Use a respirator that is approved for use in an
asbestos-laden atmosphere.
• Never use compressed air for cleaning.
ARO1770L
• Use water for cleaning to keep down the dust. Figure 7
• Work on the machine or component with the wind
at your back whenever possible.
• Always observe any rules and regulations related
to the work site and working environment.
Injury from Work Equipment

Do not enter or put your hand, arm or any other part of
your body between movable parts, such as between the
work equipment and cylinders, or between the machine and
work equipment.
If the control levers are operated, the clearance between the
machine and the work equipment will change and this may
lead to serious damage or personal injury.
If going between movable parts is necessary, always position
HDO1010L
and secure the work equipment so that it cannot move.
Figure 8
Fire Extinguisher and First Aid Kit

As a precaution if any injury or fire should occur, always do
the following.
• Be sure that fire extinguishers have been provided
and read the labels to ensure that you know now
to use them. It is recommended that an
appropriately sized (2.27 kg [5 lb] or larger)
multipurpose "A/B/C" fire extinguisher be mounted
in the cabin. Check and service the fire extinguisher
at regular intervals and make sure that all work site HDO1009L
crew members are adequately trained in its use. Figure 9
• Provide a first aid kit in the storage compartment
and keep another at the work site. Check the kit
periodically and make any additions if necessary.
• Know what to do in case of injury from fire.
• Keep emergency numbers for doctor, ambulance
service, hospital and fire department near your
telephone.
Safety OP000481
1-21
If the machine catches fire, it may lead to serious personal
injury or death. If a fire occurs during operation, escape
from the machine as follows;
• Turn the starter switch to the "O" (OFF) position
and shut down engine.
• If there is time, use the fire extinguisher to
extinguish as much of the fire as possible.
• Use the handrails and steps to escape from the
machine.
The above is the basic method for escaping from the
machine, but changing the method may be necessary
according to the conditions, so carry out practice drills at the
work site.
Protection from Falling or Flying Objects

On work sites where there is danger that falling objects or
flying objects may hit the operator's cabin select a guard to
match the operating conditions to protect the operator.
Working in mines, tunnels, deep pits or on loose or wet
surfaces could produce danger of falling rock or hazardous
flying objects. Additional protection for the operator's cabin
could be required in the form of a FOPS (Falling Object
Protective Structure) or window guards.
HAOA110L
Figure 10
Never attempt to alter or modify any type of protective

structure reinforcement system, by drilling holes, welding,
remounting or relocating fasteners. Any serious impact or
damage to the system requires a complete integrity
reevaluation. Reinstallation, recertification and/or replacement
of the system may be necessary.
Contact your DOOSAN distributor for available safety guards
and/or recommendations if there is any danger of getting hit
by objects that could strike the operator's cabin. Make sure
that all other work site crew members are kept well away
from the excavator and safe from possible hazards. HAOA100L
Figure 11
For breaker operation, install a front guard and apply a
laminated coating sheet to the front glass. Contact your
DOOSAN distributor for recommendations.
When carrying out demolition or cutting operation, install a
front guard and top guard, and apply a laminated coating
sheet to the front glass.
When working in mines or quarries where there is danger of
falling rock, install FOPS (Falling Objects Protective
Structure) and apply a laminated coating sheet to the front
glass.
If any glass on the machine is broken, replace it with new
glass immediately.
Safety OP000481
1-22
Attachment Precautions
Option kits are available through your dealer. Contact
DOOSAN for information on available one-way (single-acting)
and two-way (double-acting) piping / valving / auxiliary
control kits. Because DOOSAN cannot anticipate, identify or
test all of the attachments that owners may wish to install
on their machines, please contact DOOSAN for authorization
and approval of attachments, and their compatibility with
options kits.
Accumulator
The pilot control system is equipped with an accumulator.
For a brief period of time after the engine has been shut
down, the accumulator will store a pressure charge that may
enable hydraulic controls to be activated. Activation of any
controls may enable the selected function to operate under
force of gravity.
When performing maintenance on the pilot control system,
the hydraulic pressure in the system must be released as
describe in “Handling of Accumulator” on page 4-80.
The accumulator is charged with high-pressure nitrogen gas,
so it is extremely dangerous if it is handled in the wrong
way. Always observe the following precautions;
• Do not drill or make any holes in the accumulator
or expose it any flame, fire or heat source.
• Do not weld on the accumulator, or try attaching
anything to it.
• When carrying out disassembly or maintenance of
the accumulator, or when disposing of the
accumulator, the charged gas must be properly
released. Contact your DOOSAN distributor.
• Wear safety goggles and protective gloves when
working on an accumulator. Hydraulic oil under
pressure can penetrate the skin and cause
serious injuries.
Indoor Ventilation
Engine exhaust gases can cause fatal accidents, and
unconsciousness, loss of alertness, judgement and motor
control and serious injury.
Make sure there is adequate ventilation before starting the
engine in any enclosed area.
You should also be aware of open windows, doors or
ductwork into which exhaust may be carried, or blown by
the wind, exposing others to danger.
ARO1770L
Figure 12
Safety OP000481
1-23
Emergency Exit
This machine is equipped with a glass breaking tool. It is
behind the operator seat in the upper right corner of the
cabin. This tool can be used in case of an emergency
situation that requires the breaking of glass to exit from the
operator's cabin. Grip the handle firmly and use the sharp
point to break the glass.
WARNING! FG000178
Figure 13
Protect your eyes when breaking the glass.
Safety OP000481
1-24
BEFORE STARTING ENGINE
Work Site Precautions

Before starting operations, thoroughly check the area for any
unusual conditions that could be dangerous.
Check the terrain and condition of the ground at the work
site, and determine the best and safest method of operation.
Make the ground surface as hard and horizontal as possible
before carrying out operations. If there is a lot of dust and
sand on the work site, spray water before starting operations.
If you need to operate on a street, protect pedestrians and
cars by designating a person for work site traffic duty or by
erecting fences and posting "No Entry" signs around the
work site.
Erect fences, post "No Entry" signs, and take other steps to
prevent people from coming close to or entering the work
site. If people come close to a moving machine, they may
be hit or caught by the machine, and this may lead to
serious personal injury or death. DANGER
No Entry
Water lines, gas lines, phone lines and high voltage FG000400
electrical lines may be buried under the work site. Contact
Figure 14
each utility and identify their locations. Be careful not to
damage or cut any of these lines.
Check the condition of the river bed, and the depth and flow
of the water before operating in water or crossing a river.
NEVER be in water that is in excess of the permissible
water depth.
Any type of object in the vicinity of the boom could
represent a potential hazard, or cause the operator to react
suddenly and cause an accident. Use a spotter or signal
person working near bridges, phone lines, work site
scaffolds, or other obstructions.
FG000363
Figure 15
Minimum levels of insurance coverage, work permits or

certification, physical barriers around the work site or
restricted hours of operation may be mandated by governing
authorities. There may also be regulations, guidelines,
standards or restrictions on equipment that may have to be
followed for local requirements. There may also be
regulations related to performing certain kinds of work. If
there is any question about whether your machine and work
site complies with the applicable standards and regulations
contact your local authorities and agencies.
Avoid entering soft ground. It will be difficult for the machine FG000372
to escape. Figure 16
Safety OP000481
1-25
Avoid operating your machine to close to the edge of cliffs,
overhangs, and deep ditches. The ground may be weak in
such areas. If the ground should collapse, the machine
could fall or tip over and this could result in serious injury or
death.
Remember that the soil after heavy rain, blasting or after
earthquakes, is weakened in these areas.
Earth laid on the ground and the soil near ditches is loose.
It can collapse under the weight of vibration of your machine
and cause your machine to tip over.
Install the head guard (FOPS) if working in areas where
there is danger of falling rocks.
Checks Before Starting Engine

Every day before starting the engine for the first time, carry
out the following checks. If these checks are not carried out
properly, there is danger of serious injury.
Completely remove all wood chips, leaves, grass, paper and
other flammable materials accumulated in the engine
compartment and around the battery. They could cause a
fire. Remove any dirt from the window glass, mirrors,
handrails, and steps.
Do not leave tools or spare parts laying around in the
operator's compartment. The vibration of the machine when
traveling or during operations may cause them to fall and
damage or break the control levers or switches. They may
also get caught in the gap of the control levers and cause
the work equipment to malfunction or move dangerously.
This may lead to unexpected accidents.
Check the coolant level, fuel level, and hydraulic tank oil
level, and check for clogged air cleaner and damage to the
electrical wiring.
Adjust the operator's seat to a position where it is easy to
operate the machine, and check the seat belt and mounts
for damage and wear.
Check the operation of the gauges and the angle of the
mirrors, and check that the safety lever is in "LOCKED"
position.
If any abnormalities are found in the above checks, carry
out repairs immediately.
Engine Starting
Walk around your machine before getting in the operator's
cabin. Look for evidence of leaking fluid, loose fasteners,
misaligned assemblies or any other indications of possible
equipment hazard.
Safety OP000481
1-26
All equipment covers and machinery safety guards must be
in place, to protect against injury while the machine is being
operated.
Look around the work site area for potential hazards, people
or properly that could be at risk while operation is in
progress.
NEVER start the engine if there is any indication that
maintenance or service work is in progress, or if a warning
tag is attached to controls in the cabin.
A machine that has not been used recently, or is being
operated in extremely cold temperatures, could require a
warm-up or maintenance service before start-up.
Check gauges and monitor displays for normal operation
before starting the engine. Listen for unusual noises and
remain alert for other potentially hazardous conditions at the
start of the work cycle.
Do not short circuit the starting motor to start the engine. This
is not only dangerous, but may also damage the machine.
When starting the engine, sound the horn as an alert.
Start and operate the machine only while seated.
Before Operating Machine

If checks are not carried out properly after starting the
engine, it may result in a delay in discovering abnormalities
in the machine, and this may lead to personal injury or
damage to the machine.
Carry out the checks in an open area where there are no
obstructions. Do not let anyone near the machine when
carrying out the checks.
• Check the operating condition of the equipment,
and the actuation of the bucket, arm, boom,
travel, and swing systems.
• Check the machine for any abnormal noise,
vibration, heat, smell, or abnormality with the
gauges. Check also for leakage of air, oil, and fuel.
• If any abnormality is found, repair the problem
immediately. If the machine is used without
repairing the problems, it may lead to unexpected
injury or failure.
• Clear all personnel from directly around machine
and from the area.
• Clear all obstacles from the machine's path.
Beware of hazards.
• Be sure that all windows are clean. Secure the
doors and the windows in the open position or in
the shut position.
Safety OP000481
1-27
• Adjust the rear view mirrors for best visibility close
to the machine. Make sure that the horn, the
travel alarm (if equipped), and all other warning
devices are working properly.
• Fasten the seat belt securely.
• Warm up the engine and hydraulic oil before
operating machine.
• Before moving the machine, check the position of
undercarriage. The normal travel position is with
idler wheels to the front under the cabin and the
drive sprockets to the rear. When the
undercarriage is in the reversed position, the travel
controls must be operated in opposite directions.
Safety OP000481
1-28
MACHINE OPERATION
When Swinging or Changing Direction

of Travel
Before operating the machine or the work equipment, always
observe the following precautions to prevent serious injury or
death.
• Start and operate the machine only while seated.
• When changing the direction of travel from
forward to reverse or from reverse to forward,
reduce speed early and stop the machine before HAOA190L
changing the direction of travel. Figure 17
• Sound the horn to warn people in the area.
• Check that there is no one in the area around the
machine. There are blind spots behind the
machine, so if necessary, swing the upper
structure to check that there is no one behind the
machine before traveling in reverse.
• When operating in areas that may be hazardous
or have poor visibility, designate a person to
direct work site traffic.
• Ensure that no unauthorized person can come
within the turning radius or direction of travel.
Be sure to observe the above precautions even if a travel
alarm or mirrors are installed.
Safety OP000481
1-29
Travel Precautions
TRAVEL POSTURE
Never turn the starting switch to the "O" (OFF) position
when traveling. It is dangerous if the engine stops when the
machine is traveling. It will be impossible to operate the
steering.
Attachment control levers should not be operated while
traveling.
Do not change selected travel mode (FAST/SLOW) while
traveling. 40~50cm (16~20 in)
Fold in work equipment so that the outer end of the boom

is as close to the machine as possible, and is 40 - 50 cm INCORRECT
(16 - 20 in) above ground.
Never travel over obstacles or slopes that will cause the
machine to tilt severely. Travel around any slope or obstacle
that causes the machine to tilt 10 degrees or more to the
right or left, or 30 degrees or more from front to rear.
Do not operate the steering suddenly. The work equipment
may hit the ground and cause the machine to lose its
balance, and this may damage the machine or structures in FG006902
the area.
Figure 18
When traveling on rough ground, travel at low speed, and
avoid sudden changes in direction.
Always keep to the permissible water depth. Permissible
water depth is to the center line of the upper track rollers.
When traveling over bridges or structures on private land,
check first that the bridge or structure can withstand the
weight of the machine. When traveling on public roads,
check with the local authorities and follow their instructions.
Safety OP000481
1-30
Traveling on Slopes
Never jump onto a machine that is running away to stop it.
There is danger of serious injury.
Traveling on slopes could result in the machine tipping over
or slipping. 20~
30
cm
On hills, banks or slopes, carry the bucket approximately 20
- 30 cm (8 - 12 in) above the ground. In case of an
emergency, quickly lower the bucket to the ground to help
stop the machine.
Do not travel on grass, fallen leaves, or wet steel plates.
Even slight slopes may cause the machine to slip to the
side, so travel at low speed and make sure that the
machine is always traveling directly up or down the slope.
Avoid changing the direction of travel on a slope. This could
result in tipping or side slipping of the machine. cm
30
When possible, operate the machine up slopes and down 20~
slopes. Avoid operating the machine across the slope, when
possible.
FG006903
Figure 19
Prohibited Operations
Do not dig the work face under an overhang. This may
cause the overhang to collapse and fall on top of the
machine.
FG006904
Figure 20
Safety OP000481
1-31
Do not carry out deep digging under the front of the
machine. The ground under the machine may collapse and
cause the machine to fall.
Working heavy loads over loose, soft ground or uneven,
broken terrain can cause dangerous side load conditions
and possible tipover and injury. Travel without a load or a
balanced load may also be hazardous.
Never relay on lift jacks or other inadequate supports when
work is being done. Block tracks fore and aft to prevent any
movement. FG006905
Figure 21
When using the machine, to prevent accidents caused by

damage to the work equipment and overturning because of
an excessive load, do not use the machine in excess of its
ability (in terms of the maximum load and stability
determined by the structure of the machine).
When working at the edge of an excavation or on a road
shoulder, the machine could tip over, possibly resulting in
serious injury or death. Investigate the configuration and
ground conditions of the work site beforehand to prevent the
machine from falling and to prevent the ground, stockpiles,
or banks from collapsing. FG006906
Figure 22
Precautions for Operation

Be careful not to go close to the edge of a cliff by mistake.
Use the machine only for its main purpose. Using it for
other purposes will cause failures.
To ensure an ample view, do as follows:
• When working in dark areas, attach working lights
and front lights to the machine. If necessary, set
up lighting at the work site.
• Stop operations when the visibility is poor, such
as in fog, mist, snow, and rain. Wait for the
visibility to improve to a level which causes no
problems for the operation.
To avoid hitting the work equipment, always do the following;
• When working in tunnels, on bridges, under
electric wires, or when parking the machine or
carrying out other operations in places with limited
height, be extremely careful not to hit the bucket
or other parts.
• To prevent collisions, operate the machine at a
safe speed when working in confined spaces,
indoors, or in crowded areas.
• Do not pass the bucket over the heads of workers FG000430
or over the operator's compartment of dump truck. Figure 23
Safety OP000481
1-32
Avoid High Voltage Cables
Serious injury or death can result from contact or proximity to
high voltage electric lines. The bucket does not have to make
physical contact with power lines for current to be transmitted.
Use a spotter and hand signals to stay away from power
lines not clearly visible to the operator.
Voltage Minimum Safe Distance

6.6 kV 3 m (9' 10")
FG006907
33.0 kV 4 m (13' 1")
Figure 24
66.0 kV 5 m (16' 5")
154.0 kV 8 m (26' 3")
275.0 kV 10 m (32' 10")
Use these minimum distances as a guideline only.

Depending upon the voltage in the line and atmospheric
conditions, strong current shocks can occur with the boom
or bucket as far away as 4 - 6 m (13 - 20 ft.) from the
power line. Very high voltage and rainy weather could
further decrease that safety margin.
NOTE: Before starting any type of operation near power lines
(either above ground or buried cable type), you
should always contact the power utility directly and
work out a safety plan with them.
Protecting Cabin from Falling Object

(Optional)
In a work site where falling objects or flying objects are
expected, be sure to install adequate protective devices for 1
covering the cabin.
When using a breaker, be sure to install the front window
protection guard (Figure 25).
FG000112
Figure 25
Safety OP000481
1-33
In a work site where falling rocks can cause damage and
possibly crush personnel, or in a mining operation, be sure
to install the falling object protective structure (Figure 26).
Be sure to install any other additional protective structures
required for work site conditions.
When the falling object protective structure is installed, and
the front window needs to be cleaned, loosen the bolts
marked with an arrow. Be sure to tighten bolts when done. 2
Operate Carefully on Snow, Ice and in

Very Cold Temperatures
In icy cold weather avoid sudden travel movements and stay
away from even slight slopes. The machine could skid off to
one side very easily.
Snow accumulation could hide or obscure potential hazards.
Use care while operating or while using the machine to FG000113
clear snow. Figure 26
Warming up the engine for a short period may be
necessary, to avoid operating with sluggish or reduced
working capacity. The jolting shocks and impact loads
caused by bumping or bottoming the boom or attachment
are more likely to cause severe stress in very cold
temperatures. Reducing work cycle rate and work load may
be necessary.
When the temperature rises, frozen road surfaces become
soft, so the machine travel becomes unstable.
In cold weather, do not touch metal surfaces with your bare
hands. If you touch a metal surface in extremely cold
weather, your skin may freeze to the metal surface.
Operations on Slopes
When working on slopes. there is danger that the machine
may lose its balance and turn over, when swinging, or when
work equipment is operated. Always carry out these
operations carefully.
Do not swing the work equipment from the uphill side to the
downhill side when the bucket is loaded. This operation is
dangerous.
If the machine has to be used on a slope, pile the soil to FG006908
make a platform that will keep the machine as horizontal as
possible. Figure 27
In addition, lower the bucket as far as possible, keep it

pulled into the front, and keep the swing speed as low as
possible.
Safety OP000481
1-34
Parking Machine
Avoid making sudden stops, or parking the machine
wherever it happens to be at the end of the work day. Plan 120
ahead so that the excavator will be on firm, level ground
away from traffic and away from high walls, cliff edges and
any area of potential water accumulation or runoff. If parking
Block
on inclines is unavoidable, block the crawler tracks to
prevent movement. Lower the bucket or other working
attachment completely to the ground, or to an overnight
support saddle. There should be no possibility of unintended
or accidental movement.
Unlock
When parking on public roads, provide fences, signs, flags,
or lights, and put up any other necessary signs to ensure
that passing traffic can see the machine clearly, and park
the machine so that the machine, flags, and fences do not
obstruct traffic. Lock
FG006909
After the front attachment has been lowered to an overnight
storage position and all switches and operating controls are Figure 28
in the "OFF" position, the safety lock lever must be set to
the "LOCKED" position. This will disable all pilot circuit
control functions.
Always close the door of the operator's compartment.
Never Let Anyone Ride on Attachment

Never let anyone ride on any work attachment, such as the
bucket, crusher, grapple, or clamshell (grab bucket). There is
a danger of the person falling and suffering serious injury.
ARO1310L
Figure 29
Safety OP000481
1-35
MAINTENANCE
Warning Tag
Alert others that service or maintenance is being performed
and tag operator's cabin controls – and other machine areas
if required – with a warning notice. OSHA mandated control WARNING
lever lockout can be made with any OSHA certified lockout
DO NOT OPERATE
device and a length of chain or cable to keep the safety
lever in the fully lowered, nonactive position. when performing inspection
or maintenance
Warning tags, for controls are available from DOOSAN
190-00695
distributors.
ARO1320L
Figure 30
Clean Before Inspection or Maintenance

Clean the machine before carrying out inspection and
maintenance. This prevents dirt from getting into the
machine and also ensures safety during maintenance.
If inspection and maintenance are carried out when the
machine is dirty, it will become more difficult to locate the
problems, and also there is danger that you may get dirt or
mud in your eyes or that you may slip and injure yourself.
When washing the machine, do the following;
• Wear shoes with nonslip soles to prevent yourself
from slipping and falling on wet places.
• Wear safety glasses and protective clothing when
washing the machine with high-pressure steam.
• Take action to prevent touching high-pressure
water and cutting your skin or having mud fly into
your eyes. ARO1330L
Figure 31
• Do not spray water directly on electrical
components (sensors, connector). If water gets
into the electrical system, there is danger that it
will cause defective operation and malfunction.
Pick up any tools or hammers that are laying in the work
place, wipe up any grease or oil or any other slippery
substances, and clean the area to make it possible to carry
out the operation in safety. If the work place is left untidy,
you may trip or slip and suffer injury.
Safety OP000481
1-36
Proper Tools
Use only tools suited to the task. Using damaged, low
qualify, faulty, or makeshift tools could cause personal injury.
There is danger that pieces from, chisels with crushed
heads, or hammers, may get into your eyes and cause
blindness.
HDO1037L
Figure 32
Use of Lighting
When checking fuel, oil, battery electrolyte, or window
washing fluid, always use lighting with antiexplosion
specifications. If such lighting equipment is not used, there
is danger of an explosion.
If work is carried out in dark places without using lighting, it
may lead to injury, so always use proper lighting.
Even if the place is dark, never use a lighter or flame
instead of lighting. There is danger of fire. There is also
HDO1040L
danger that the battery gas may catch fire and cause and
Figure 33
explosion.
Fire Prevention and Explosion

Prevention
All fuels, most lubricants and some coolant mixtures are
flammable. Leaking fuel or fuel that is spilled onto hot
surfaces or onto electrical components can cause a fire.
Store all fuels and all lubricants in properly marked
containers and away from all unauthorized persons.
Store oily rags and other flammable material in a protective
container. HDO1015I
Do not smoke while you refuel the machine or while you are Figure 34
in a refueling area.
Do not smoke in battery charging areas or in areas the
contain flammable material.
Clean all electrical connections and tighten all electrical
connections. Check the electrical wires daily for wires that
are loose of frayed. Tighten all lose electrical wires before
you operate the machine. Repair all frayed electrical wires
before you operate the machine.
Remove all flammable materials before they accumulate on
the machine.
Safety OP000481
1-37
Do not weld on pipes or on tubes that contain flammable
fluids. Do not flame cut on pipes or on tubes that contain
flammable fluids. Before you weld on pipes or on tubes or
before you flame cut on pipes or on tubes, clean the pipes
or tubes thoroughly with a nonflammable solvent.
Burn Prevention
When checking the radiator coolant level, shut down engine,
let the engine and radiator cool down, then check the
coolant recovery tank. If the coolant level in the coolant
recovery tank is near the upper limit, there is enough
coolant in the radiator.
Loosen the radiator cap gradually to release the internal
pressure before removing the radiator cap.
If the coolant level in the coolant recovery tank is below the
lower limit, add coolant.
Cooling system conditioner contains alkali. Alkali can cause
personal injury. Do not allow alkali to contact the skin, the
eyes, or the mouth.
Allow cooling system components to cool before you drain
the cooling system.
Hot oil and hot components can cause personal injury. Do
not allow hot oil or hot components to contact the skin.
Remove the hydraulic tank filter plug only after the engine
has been stopped. Make sure that the hydraulic tank filter
plug is cool before you remove it with your bare hand.
Remove the hydraulic tank filter plug slowly to relieve
pressure.
Relieve all pressure in the hydraulic oil system, in the fuel
system, or in the cooling system before you disconnect any HAAE1980
lines, fittings, or related items. Figure 35
Batteries give off flammable fumes that can explode.
Do not smoke while you are checking the battery electrolyte
levels.
Electrolyte is an acid. Electrolyte can cause personal injury.
Do not allow electrolyte to contact the skin or the eyes.
Always wear protective glasses when you work on batteries.
Safety OP000481
1-38
Welding Repairs
CAUTION!
When you connect or disconnect connectors between
ECU and Engine or connector between ECU and the
machine, always disconnect the source power to protect
damage of the ECU.
If you don't observe this procedure, the ECU would be
damaged or the engine would operate abnormally.
When carrying out welding repairs, carry out the welding in

a properly equipped place. The welding should be performed
by a qualified worker. During welding operations, there is the
danger of, generation of gas, fire, or electric shock, so never
let an unqualified worker do welding.
The qualified welder must do the following;
• To prevent explosion of the battery, disconnect
the battery terminals and remove batteries.
• To prevent generation of gas, remove the paint
from the location of the weld.
• If hydraulic equipment, piping or places close to
them are heated, a flammable gas or mist will be
generated and there is danger of it catching fire.
To avoid this, never subject these places to heat.
• Do not weld on pipes or on tubes that contain
flammable fluids. Do not flame cut on pipes or on
tubes that contain flammable fluids. Before you
weld on pipes or on tubes or before you flame
cut on pipes or on tubes, clean the pipes or
tubes thoroughly with a nonflammable solvent.
• If heat is applied directly to rubber hoses or
piping under pressure, they may suddenly break
so cover them with a fireproof covering.
• Wear protective clothing.
• Make sure there is good ventilation.
• Remove all flammable objects and provide a fire
extinguisher.
Safety OP000481
1-39
Treatment for Electrical Welding to the Body Structure
To prevent damage to ECU by electrical welding, please
observe the following procedures:
1. Open the door of the battery cover.
2. Detach the cover after loosening the bolts on the
battery.
3. Detach the positive and negative terminal cables from
the battery.
4. Detach the undercover, and after that detach the FG000312
connector (1) from the ECU that are installed at the Figure 36
engine.
5. Proceed with welding.
6. After welding, carefully reassemble the connector.
7. Connect the battery terminal cables. 1
8. Reassemble the undercover under the engine.
9. Reassemble the cover over the battery.
10. Close the cover of the battery.
FG000335
Figure 37
Warning for Counterweight and Front

Attachment Removal
DANGER!
DOOSAN warns any user, that the removal of the
counterweight from the machine, front attachment or
any other part, may affect the stability of the machine.
This could cause unexpected movement, resulting in
death or serious injuries. DOOSAN is not liable for any
misuse.
Never remove the counterweight or front attachment
unless the upper structure is in-line with the lower FG006910
structure. Figure 38
Never rotate the upper structure once the counterweight
or front attachment has been removed.
Safety OP000481
1-40
Precautions for Removal, Installation,
and Storage of Attachments
Before starting removal and installation of attachments,
decide the team leader.
Do not allow anyone except the authorized workers close to
the machine or attachment.
Place attachments that have been removed from the
machine in a safe place so that they do not fall. Put up a
fence around the attachments and take other measures to HDO1041L
prevent unauthorized persons from entering. Figure 39
Precautions When Working on Machine

When carrying out maintenance operations on the machine,
keep the area around your feet clean and tidy to prevent
you from falling. Always do the following;
• Do not spill oil or grease.
• Do not leave tools laying about.
• Watch your step when walking.
Never jump down from the machine. When getting on or off
ARO1380L
the machine, use the steps and handrails, and maintain a
Figure 40
three-point contact (both feet and one hand or both hands
and one foot) to support yourself securely.
If the job requires it, wear protective clothing.
To prevent injury from slipping or falling, when working on
the hood or covers, never use any part except the
inspection passage fitted with nonslip pads.
Lock Inspection Covers

When carrying out maintenance with the inspection cover
open, lock the cover securely in position with the lock bar.
If maintenance work is carried out with the inspection cover
open but not locked, there is danger that it may suddenly
close and cause injury if there is a gust of wind.
Crushing Prevention and Cutting

Prevention
You should always have at least two people working
together if the engine must be run during service. One
person needs to remain in the operator's seat, ready to work
the controls or stop the machine and shut off the engine.
Safety OP000481
1-41
Unless you are instructed otherwise, never attempt
adjustments while the machine is moving or while the
engine is running.
Stay clear of all rotating parts and moving parts.
Keep objects away from moving fan blades. The fan blades
will throw objects and the fan blades can cut objects.
Do not use a wire rope cable that is kinked or flayed. Wear
gloves when you handle a wire rope cable.
When you strike a retainer pin, the retainer pin might fly out.
The loose retainer pin can injure personnel. Make sure that
the area is clear of people when you strike a retainer pin.
To avoid injury to your eyes, wear protective glasses when
you strike a retainer pin.
Track Tension Adjustments Require

Caution
Never turn out the track tension grease fitting nut. To
release pressure from the crawler frame track tension
assembly, you should NEVER attempt to disassemble the
track adjuster or attempt to remove the grease fitting or
valve assembly.
Keep your face and body away from the valve. Refer to the
track adjustment procedure in the Operator and Maintenance
HAOA110L
Manual or Shop Manual.
Figure 41
Supports and Blocking for Work

Equipment
Do not allow weight or equipment loads to remain
suspended.
Lower everything to the ground before leaving the operator's
seat.
Do not use hollow, cracked or unsteady wobbling supports.
Do not work under any equipment supported only by a lifting
HDO1042L
jack.
Figure 42
Action When Abnormality Is Found

During Inspection
If any abnormality is found during inspection, always carry
out repairs. In particular, if the machine is used when there
are still problems with the brake or work equipment systems,
it may lead to serious injury.
If necessary depending on the type of failure, please contact
your DOOSAN distributor for repairs.
Safety OP000481
1-42
Precautions with High-pressure Lines,
Tubes and Hoses X
When inspecting or replacing high-pressure piping or hoses,
check that the pressure has been released from the circuit.
Failure to release the pressure may lead to serious injury.
Always do the following;
• Wear protective glasses and leather gloves.
• Fluid leaks from hydraulic hoses or pressurized X
components can be difficult to see but pressurized
oil has enough force to pierce the skin and cause
serious injury. Always use a piece of wood or
cardboard to check for suspected hydraulic leaks.
Never use your hands or expose your fingers.
• Do not bend high-pressure lines. Do not strike
high-pressure lines. Do not install lines, tubes or
hoses that are bent or damaged.
• Make sure that all clamps, guards and heat
shields are installed correctly to prevent vibration,
rubbing against other parts, and excessive heat
during operation.
HDO1045I
– If any of the following conditions are found, Figure 43
replace the part.
– Damage or leakage from hose end.
– Wear, damage, cutting of covering, or
exposure of strengthening wire layer.
– Cover portion is swollen in places.
– There is twisting or crushing at movable
parts of hose.
– Foreign material is embedded in the
covering.
– Hose end is deformed.
NOTE: Refer to “Hose In-service Lifetime Limit
(European Standard ISO 8331 and
EN982 CEN)” on page 4-58, for additional
European regulations.
Safety OP000481
1-43
Waste Materials
Physical contact with used motor oil may pose a health risk.
X
Wipe oil from your hands promptly and wash off any
remaining residue.
Used motor oil is an environmental contaminant and may
only be disposed of at approved collection facilities. To
prevent pollution of the environment, always do the
following;
• Never dump waste oil in a sewer system, rivers,
HAOA470L
etc.
Figure 44
• Always put oil drained from your machine in
containers. Never drain oil directly onto the
ground.
• Obey appropriate laws and regulations when
disposing of harmful materials such as oil, fuel,
solvent, filters, and batteries.
Safety OP000481
1-44
BATTERY
Battery Hazard Prevention

Battery electrolyte contains diluted sulfuric acid and batteries
generate hydrogen gas. Hydrogen gas is highly explosive,
and mistakes in handling them can cause serious injury or
fire. To prevent problems, always do the following;
• Do not smoke or bring any flame near the battery.
• When working with batteries, ALWAYS wear
safety glasses and rubber gloves.
• If you spill battery electrolyte on yourself or your
clothes, immediately flush the area with water.
• If battery electrolyte gets into your eyes, flush
them immediately with large quantities of water
and see a doctor at once.
• If you accidentally drink battery electrolyte, drink a
large quantity of water or milk, raw egg or
vegetable oil. Call a doctor or poison prevention
center immediately.
• When cleaning the top surface of the battery,
wipe it with a clean, damp cloth. Never use
gasoline, thinner, or any other organic solvent or
detergent.
• Tighten the battery caps securely.
• If the battery electrolyte is frozen, do not charge
the battery or start the engine with power from
another source. There is danger that the battery
may catch fire.
Figure 45
• When charging the battery or starting with power
from another source, let the battery electrolyte
melt and check that there is no leakage of battery
electrolyte before starting the operation.
• Always remove the battery from the machine
before charging.
Safety OP000481
1-45
Boost Starting or Charging Engine
Batteries
If any mistake is made in the method of connecting the
booster cables, it may cause an explosion or fire. Always do
the following;
• Turn off all electrical equipment before connecting
leads to the battery. This includes electrical
switches on the battery charger or boost starting
equipment.
HAOA310L
• When boost starting from another machine or Figure 46
vehicle do not allow the two machines to touch.
Wear safety glasses or goggles while required
battery connections are made.
• 24 volt battery units consisting of two series
connected twelve volt batteries have a cable
connecting one positive terminal on one of the 12
volt batteries to a negative terminal on the other
battery. Booster or charger cable connections
must be made between the nonseries connected
positive terminals and between the negative
terminal of the booster battery and the metal
frame of the machine being boosted or charged.
Refer to the procedure and illustration in “Starting
Engine With a Booster Cable” on page 3-7 of this
manual.
• Connect positive cable first when installing cables
and disconnect the negative cable first when
removing them. The final cable connection, at the
metal frame of the machine being charged or
boost started, should be as far away from the
batteries as possible.
Safety OP000481
1-46
TOWING
Precautions When Towing

Cloth
If any mistake is made in the method of selecting or
inspecting the towing wire or in the method of towing, it may
lead to serious personal injury. Always do the following;
• Always use the method of towing given in this
Operation and Maintenance Manual. Do not use
any other method.
Towing Wire
• Use leather gloves when handling the wire rope.
• When carrying out the preparation work for towing
with two or more workers, determine the signals
to use and follow these signals correctly.
• Always fit the towing rope to the left and right
hooks and secure in position.
Shackle
• If the engine on the problem machine will not
start or there is a failure in the brake system.
always contact your DOOSAN distributor.
Towing Wire FG000669
• Never go between the towing machine and the
towed machine during the towing operation. Figure 47
• It is dangerous to carry out towing on slopes, so

select a place where the slope is gradual. If there
is no place where the slope is gradual, carry out
operations to reduce the angle of the slope before
starting the towing operation.
• When towing a problem machine, always use a
wire rope with a sufficient towing capacity.
• Do not use a frayed, kinked rope or a rope with
any loss of diameter.
• Do not use the lightweight towing hook for towing
another machine.
Safety OP000481
1-47
SHIPPING AND
TRANSPORTATION
Obey State and Local Over-the-Road

Regulations
Check state and local restrictions regarding weight, width
and length of a load before making any other preparation for
transport.
The hauling vehicle, trailer and load must all be in
compliance with local regulations governing the intended
shipping route.
Partial disassembly or teardown of the excavator may be
necessary to meet travel restrictions or particular conditions
at the work site. See the Shop Manual for information on
partial disassembly.
Refer to the Transportation and Shipping section of this
Operation and Maintenance Manual for information on
loading, unloading and towing.
Safety OP000481
1-48
EXCAVATOR RATED LIFT
CAPACITY TABLES
WARNING!
Let everybody be away from the boom cylinder. While
lifting operation, boom, arm, bucket hoses might burst
and then high-pressure oil will be ejected at high speed.
If that failure mode takes place, handling weight or front
structure might fall by its gravity to the ground to cause
fatal injury to the person.
When changing the hoses record the part numbers of
the hoses to factory log book.
Do the service job under the company's serviceman. Figure 48
WARNING!
All rated lift capacities are based on the machine and
the load both remaining level at all times. DO NOT
EXCEED THE RATED LIFT CAPACITY. Lifting loads
greater than those shown in the rated capacity tables
can cause catastrophic equipment failure and/or
structural collapse of the machine.
To operate safely the excavator should be on a firm, level

and uniformly supporting surface. The operator is expected
to make due allowance for all specific work site and lift
related conditions, and respond to changes in those
conditions that could pose a hazard. The following could all
cause hazardous conditions and accidents or injuries:
• Soft or uneven ground.
• Unlevel terrain.
• Side loads.
• Modifications or poor maintenance of the excavator.
• Failure to lift squarely over the end or over the
side of the machine.
When a load is in the air, the operator must remain alert.
• Avoid side loads that may be caused by uneven
slings, traveling with the load or swinging too
quickly.
• The load can become unbalanced if the hook line
is twisted and starts to rotate. If the surface area
of the load is large enough, wind gusts can
create side loads.
Safety OP000481
1-49
• Keep the bucket hook point directly over the load.
Tag lines on opposite sides of the load can help
maintain greater stability against side loads and
wind gusts.
Avoid traveling with a suspended load. Before swinging (or if
required, traveling), bring the load into an arm position
(radius and height) that has a safer weight capacity rating
and adequate movement clearance. The operator and all
work site personnel should be thoroughly familiar with safety
instructions and procedures within this Operation and
Maintenance Manual.
The following weight loads are in compliance with SAE
(J1097) and ISO applicable, recommended standards for
hydraulic excavators performing lifting operation on a firm
supporting surface. An asterisk (*) next to the lift rating
indicates rated load does not exceed 87% of hydraulic
capacity. All other ratings have been determined not to
exceed 75% of tipping capacity.
Do not attempt to lift or hold any load that exceeds rated
load capacity at the specified distances (from the machine's
rotation center line and height - see "lift radius" and "lift
height" in the reference drawing, Figure 49).
Lifting Radius
Centerline
of Rotation
Lifting
Point
Lifting
Point
Height
Ground Line (Machine Supporting Surface)
FG006911
Figure 49
The weight of slings and any auxiliary lifting device (and/or

the weight difference of any attachment heavier than
standard configuration) must be deducted from the rated lift
capacity to determine allowable net lifting load. The lift point
should be on the back of the bucket, as shown in Figure 49.
Safety OP000481
1-50
IMPORTANT
Select the Digging Mode switch on the Instrument Panel
before using the excavator for lifting work. Engine and
hydraulic oil should both be fully warmed up to
operating temperature before starting a lift.
Safety OP000481
1-51
A TRACK WIDTH 3.2 m (10' 6") STD TRACK
BOOM 5.9 m (19' 5")
ARM 3 m (9' 10")
BUCKET SAE 1.1 m3 (CECE 0.95 m3)
B
SHOE 600mm (24'')
RATING OVER FRONT
RATING OVER SIDE OR 360 degree
UNIT 1,000 kg (1,000 lb)
METRIC
A(m) 2 3 4 5 6 7 8 MAX. REACH
B(m) A(m)
8 * 3.86 * 3.86 6.46

7 * 4.50 * 4.50 * 3.78 * 3.78 7.29
6 * 5.10 5.03 * 3.79 * 3.79 7.90
5 * 5.56 * 5.56 * 5.36 4.96 * 4.97 3.95 * 3.87 3.66 8.35
4 * 6.91 * 6.91 * 6.22 * 6.22 * 5.77 4.86 * 5.48 3.90 * 4.01 3.40 8.66
3 * 14.39 * 14.39 * 10.14 * 10.14 * 8.13 8.02 * 6.98 6.04 * 6.25 4.74 * 5.78 3.83 * 4.21 3.23 8.85
2 * 6.79 * 6.79 * 12.12 10.93 * 9.33 7.73 * 7.75 5.86 * 6.76 4.63 5.71 3.75 * 4.48 3.15 8.91
1 * 5.90 * 5.90 * 13.53 10.55 * 10.32 7.48 * 8.42 5.70 6.95 4.52 5.64 3.69 4.81 3.14 8.87
0 (GROUND) * 3.58 * 3.58 * 7.22 * 7.22 * 14.27 10.35 * 10.98 7.32 8.73 5.58 6.86 4.44 5.58 3.64 4.91 3.20 8.70
-1 * 6.23 * 6.23 * 9.35 * 9.35 * 14.46 10.27 * 11.29 7.23 8.65 5.51 6.80 4.39 5.55 3.61 5.15 3.35 8.42
* 8.80 * 8.80 * 12.04 * 12.04 * 14.20 10.27 * 11.25 7.21 8.62 5.48 6.78 4.37 5.56 3.61 8.00
-2
-3 * 11.63 * 11.63 * 15.40 * 15.40 * 13.51 10.33 * 10.83 7.24 8.64 5.50 6.81 4.40 6.25 4.05 7.42
-4 * 14.97 * 14.97 * 15.66 * 15.66 * 12.31 10.46 * 9.94 7.32 * 8.10 5.57 * 7.04 4.83 6.63
-5 * 13.01 * 13.01 * 10.36 * 10.36 * 8.30 7.48 * 7.22 * 6.39 5.56
FEET
A (ft) 10' 15' 20' 25' MAX. REACH
B (ft) A (ft)
25 * 8.42 * 8.42 22' 4"

20 * 9.84 9.57 * 8.35 * 8.35 25' 9"
15 * 12.76 * 12.76 * 11.89 9.41 * 8.65 7.79 27' 11"
10 * 30.61 * 30.61 * 19.33 * 19.33 * 15.12 13.01 * 13.04 9.14 * 9.25 7.14 29' 0"
5 * 13.94 * 13.94 * 24.06 19.20 * 17.55 12.43 13.51 8.85 * 10.25 6.91 29' 3"
0 (GROUND) * 16.48 * 16.48 * 26.88 18.50 18.78 12.02 13.26 8.63 10.83 7.05 28' 7"
-5 * 24.06 * 24.06 * 27.50 18.26 18.55 11.82 13.15 8.53 11.76 7.65 26' 11"
-10 * 34.96 * 34.96 * 26.08 18.35 18.59 11.85 13.88 9.00 24' 3"
-15 * 31.09 * 31.09 * 22.04 18.74 * 15.79 12.27 19' 11"
1. LOAD POINT IS THE HOOK ON THE BACK OF THE BUCKET.

2. * RATED LOADS ARE BASED ON HYDRAULIC CAPACITY.
3. RATED LOADS DO NOT EXCEED 87 % OF HYD. CAPACITY OR 75 % OF TIPPING CAPACITY.
FG006912
Safety OP000481
1-52
BOOM 5.9 m (19' 5")
ARM 2.5 m (8' 2")
BUCKET SAE 1.17 m3 (CECE 1 m3)
SHOE 600mm (24'')
B
RATING OVER FRONT
UNIT 1,000 kg (1,000 lb)
METRIC
A(m) 2 3 4 5 6 7 8 MAX. REACH
B(m) A(m)
7 * 5.60 * 5.60 * 5.32 * 5.32 6.44

6 * 5.76 * 5.76 * 5.70 4.91 * 5.37 4.76 7.13
5 * 6.19 * 6.19 * 5.88 4.85 * 5.53 4.20 7.62
4 * 12.79 * 12.79 * 9.38 * 9.38 * 7.75 * 7.75 * 6.81 6.10 * 6.24 4.77 * 5.79 3.85 7.96
3 * 11.47 11.13 * 8.92 7.85 * 7.53 5.93 * 6.67 4.67 5.73 3.77 5.54 3.65 8.16
2 * 13.21 10.68 * 10.00 7.59 * 8.22 5.77 6.99 4.57 5.66 3.71 5.41 3.54 8.23
1 * 14.20 10.43 * 10.81 7.40 * 8.78 5.64 6.90 4.48 5.61 3.66 5.42 3.53 8.18
0 (GROUND) * 6.90 * 6.90 * 14.51 10.32 * 11.25 7.28 8.70 5.55 6.83 4.42 5.57 3.63 5.56 3.62 8.01
-1 * 7.23 * 7.23 * 10.43 * 10.43 * 14.33 10.31 * 11.33 7.24 8.65 5.51 6.80 4.39 5.89 3.83 7.70
-2 * 10.83 * 10.83 * 14.33 * 14.33 * 13.76 10.35 * 11.05 7.25 8.65 5.51 6.81 4.40 6.49 4.20 7.23
-3 * 14.64 * 14.64 * 16.01 * 16.01 * 12.76 10.45 * 10.36 7.31 * 8.49 5.56 * 7.52 4.86 6.58
-4 * 17.61 * 17.61 * 13.82 * 13.82 * 11.16 10.61 * 9.06 7.43 * 7.77 6.14 5.68
-5 * 8.51 * 8.51 * 7.78 * 7.78 4.38
FEET
A (ft) 10' 15' 20' 25' MAX. REACH
B (ft) A (ft)
25 * 11.82 * 11.82 19' 4"

20 * 12.61 * 12.61 * 11.82 10.64 23' 2"
15 * 16.62 * 16.62 * 14.09 13.30 * 12.93 9.22 * 12.41 8.89 25' 6"
10 * 21.46 19.91 * 16.30 12.77 13.67 9.00 12.24 8.06 26' 9"
5 * 25.62 18.89 * 18.45 12.27 13.40 8.76 11.89 7.78 27' 0"
0 (GROUND) * 15.84 * 15.84 * 27.49 18.41 18.70 11.95 13.23 8.59 12.27 7.98 26' 3"
-5 * 27.88 * 27.88 * 27.19 18.33 18.58 11.85 13.59 8.81 24' 6"
-10 * 34.70 * 34.70 * 24.81 18.54 * 18.26 11.98 * 16.61 10.81 21' 6"
-15 * 26.42 * 26.42 * 19.15 19.08 * 17.27 16.60 16' 5"

FG006913
Safety OP000481
1-53
BOOM 5.9 m (19' 5")
ARM 3.5 m (11' 6")
BUCKET SAE 0.92 m3 (CECE 0.81 m3)
B
SHOE 600mm (24'')
RATING OVER FRONT
UNIT 1,000 kg (1,000 lb)
METRIC
A(m) 2 3 4 5 6 7 8 9 MAX. REACH
B(m) A(m)
8 * 3.34 * 3.34 6.96

7 * 4.49 * 4.49 * 3.28 * 3.28 7.74
6 * 4.70 * 4.70 * 4.04 4.02 * 3.28 * 3.28 8.32
5 * 4.99 * 4.99 * 4.93 3.98 * 3.34 * 3.34 8.74
4 * 5.77 * 5.77 * 5.42 4.89 * 5.18 3.92 * 3.59 3.19 * 3.45 3.17 9.04
3 * 12.58 * 12.58 * 9.22 * 9.22 * 7.54 * 7.54 * 6.56 6.08 * 5.93 4.76 * 5.51 3.84 * 4.40 3.15 * 3.61 3.02 9.22
2 * 10.47 * 10.47 * 11.31 11.06 * 8.81 7.79 * 7.38 5.89 * 6.47 4.64 5.72 3.76 4.73 3.10 * 3.83 2.94 9.28
1 * 7.24 * 7.24 * 12.96 10.63 * 9.90 7.52 * 8.12 5.71 * 6.95 4.52 5.64 3.68 4.68 3.05 * 4.12 2.93 9.24
0 (GROUND) * 3.91 * 3.91 * 7.64 * 7.64 * 13.96 10.37 * 10.70 7.33 * 8.70 5.58 6.85 4.43 5.57 3.62 4.65 3.02 * 4.52 2.98 9.08
-1 * 5.96 * 5.96 * 9.17 * 9.17 * 14.38 10.24 * 11.15 7.21 8.63 5.49 6.77 4.36 5.52 3.58 4.78 3.10 8.81
-2 * 8.12 * 8.12 * 11.34 * 11.34 * 14.33 10.21 * 11.26 7.16 8.58 5.44 6.74 4.33 5.51 3.56 5.12 3.32 8.41
-3 * 10.54 * 10.54 * 14.13 * 14.13 * 13.83 10.24 * 11.00 7.17 8.58 5.44 6.75 4.34 5.68 3.68 7.86
-4 * 13.39 * 13.39 * 16.61 * 16.61 * 12.86 10.34 * 10.32 7.23 * 8.44 5.49 6.81 4.39 6.63 4.29 7.12
-5 * 16.96 * 16.96 * 14.31 * 14.31 * 11.24 10.50 * 9.03 7.35 * 7.20 5.60 *
6.95 5.42 6.14
-6 * 10.81 * 10.81 * 8.54 * 8.54 * *
7.04 7.04 4.75
FEET
A (ft) 10' 15' 20' 25' 30' MAX. REACH
B (ft) A (ft)
25 * 7.29 * 7.29 23' 11"

20 * 10.02 9.67 * 7.23 * 7.23 27' 2"
15 * 11.79 * 11.79 * 11.17 9.47 * 7.46 7.25 29' 2"
10 * 26.77 * 26.77 * 17.78 * 17.78 * 14.22 13.09 * 12.41 9.17 * 8.52 6.76 * 7.94 6.67 30' 3"
5 * 18.92 * 18.92 * 22.84 19.36 * 16.81 12.48 13.52 8.85 * 10.03 6.61 * 8.73 6.45 30' 5"
0 (GROUND) * 17.44 * 17.44 * 26.22 18.52 18.77 12.01 13.23 8.59 * 9.97 6.56 29' 9"
-5 * 23.06 * 23.06 * 27.42 18.17 18.48 11.75 13.07 8.45 10.88 7.05 28' 3"
-10 * 32.04 * 32.04 * 26.58 18.18 18.45 11.72 13.10 8.47 12.60 8.16 25' 8"
-15 * 33.52 * 33.52 * 23.36 18.49 * 16.95 11.94 * 15.10 10.67 21' 8"
-20 * 15.52 * 15.52 * 15.49 * 15.49 15' 0"

FG006914
Safety OP000481
1-54
OP000482
2Operating Controls
The "Operating Controls" section presented here consists of the
following groups:
1. “Component Locations” on page 2-4
2. “Operator's Area” on page 2-6
3. “Operational Controls and Panels” on page 2-8
4. “Instrument Panel” on page 2-22
5. “Multifunction Gauge and Graphic Information” on
page 2-29
6. “Mode Selector Buttons” on page 2-34
7. “Setting Main Menu” on page 2-36
8. “Flow Control” on page 2-45
9. “Operation Selection Display” on page 2-47
10. “Heater and Air Conditioner Control Panel” on page 2-49
11. “Stereo” on page 2-55
12. “Miscellaneous Electrical Devices” on page 2-57
13. “Seat Adjustment” on page 2-59
14. “Ceiling Cover” on page 2-63
15. “Front Windows” on page 2-64
16. “Door Side Latch” on page 2-66
17. “Cabin Storage Compartments” on page 2-67
18. “Ashtray” on page 2-67
19. “Sun Visor” on page 2-68
20. “Hanger” on page 2-68
21. “Cup Holder” on page 2-69
22. “Door Window Holder” on page 2-69
23. “Emergency Glass Breaking Tool” on page 2-69
24. “Miscellaneous Access Covers and Doors” on page 2-70
Each group is explained with a point location drawing or photo

and a brief description of each control, switch, gauge or valve.
Indicator lights work besides the gauges on the instrument
panel. The operator should monitor machine pressure on the
instrument panel along with indicator lights. These lights will only
show that there is a problem.
Operating Controls OP000482

2-1
WARNING!
Warning lights. When any one or more of the warning
lights on the control console, comes "ON," immediately
stop operation and shut down unit. Investigate and
correct the problem before proceeding with operation.

2-2
2-3
COMPONENT LOCATIONS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
38
37
36
35 19
34
20
33 21
32 25
31
30 22
29
28
27 26
23
24
FG001362
Figure 1

2-4
Reference Reference
Description Description
Number Number
1 Counterweight 20 Arm
2 Engine Bonnet 21 Bucket Cylinder
3 Muffler 22 Guide Link
4 Hydraulic Oil Tank 23 Bucket
5 Fuel Tank 24 Push Link
6 Engine 25 Tooth Point
7 Fuel Tank Fill Cap 26 Side Cutter
8 Radiator And Oil Cooler 27 Idler
9 Control Valves 28 Track Adjuster
10 Swing Motor 29 Track Guide
11 Air Cleaner 30 Battery
12 Swing Bearing 31 Lower Roller
13 Cabin 32 Center Joint
14 Seat 33 Upper Roller
15 Boom Cylinder 34 Travel Motor
16 Work Lever (Joystick) Controls 35 Track Link And Shoe
17 Arm Cylinder 36 Suction Filter
18 Boom 37 Return Filter
19 Travel Lever 38 Pumps

2-5
OPERATOR'S AREA
11
10
7
8
9 14
5
4
2 17
3
1
13
18
12
15
20
16
19
FG001346
Figure 2

2-6
Reference Reference
Number Number
1 Instrument Panel 11 Storage Compartment
(See page 2-22) (See page 2-67)
2 Cigarette Lighter 12 Heater and Air Conditioner Unit
(See page 2-17) 13 Stereo
3 Ashtray (See page 2-55)
(See page 2-67) 14 Fuse Box
4 Travel Levers (See page 2-58)
(See page 3-16) 15 Left-hand Work Lever (Joystick)
5 Right-hand Work Lever (Joystick) (See page 3-23)
(See page 3-24) 16 Safety Lever
6 Storage Tray (See page 3-13)
(See page 2-67) 17 Storage Compartment
7 Engine Speed Control Dial (See page 2-67)
(See page 2-10) 18 DMS Laptop Computer
8 Heater and Air Conditioner Connector
Control Panel 19 Cup Holder
9 Starter Switch 20 Hour Meter
10 Seat
(See page 2-59)

2-7
OPERATIONAL CONTROLS
AND PANELS
20 19 18 26
17 21
22
24
4 5 3 2 1 23
16 27 14 13 12 11 10 9 8 7 6 15 25
FG000331
Figure 3

2-8
Reference Reference
Number Number
1 Starter Switch 14 Wiper Control Panel
2 Engine Speed Control Dial 15 Cigarette Lighter
3 Quick Clamp Switch (Optional) 16 Power Socket For 12v
4 Auxiliary Mode Switch 17 Travel / Swing Alarm Switch
5 Engine Emergency Stop Switch (Optional)
6 Audio Control Panel 18 Overload Warning Switch
(Optional)
7 Travel Speed Selector Switch
19 Fuel Heater Switch (Optional)
8 Light Switch
20 Seat Warmer Switch (Optional)
9 Breaker / Booster / Shear
Selector Switch 21 Horn Button
10 Cabin Work Light Switch 22 Rotating Switch
(Optional) 23 Breaker / Booster Switch
11 Warning Light Switch (Optional) 24 Shear Switch
12 Lower Wiper Switch (Optional) 25 Instrument Panel
13 Heater And Air Conditional 26 Safety Lever
Control Panel 27 Photo Sensor

2-9
1. Starter Switch
O I
A three-position starter switch is used to start or shut
down engine for equipment operation.
O. Turning the switch to this position turns the engine
"OFF" along with its electrical system. In this position
the engine is "OFF" but the interior cabin light and
fuel tank transfer pump (if equipped) are functional.
I. Turning the switch to this position turns the engine
electrical system "ON." When the switch is first
FG000014
turned "ON" the six indicator/warning lights across
Figure 4
the top of the instrument panel, will light for
approximately two seconds. The battery warning light
and the engine oil pressure warning light should
remain "ON" after the other four have turned "OFF."
NOTE: Preheat Indicator Light - The operation of
the preheat cycle depends on coolant
temperature. When the engine coolant is
cold enough, the preheat indicator light will
remain "ON" until the engine preheat cycle
is completed. The preheat cycle takes
about twenty seconds to complete, and
the indicator light will turn "OFF." When
the light turns "OFF," engage the starter.
. Moving switch to this position will crank engine.

When engine starts, release key and allow it to
return to the "I" (ON) position. Do not operate the
starter switch for more than fifteen seconds at a
time. This will help prevent damage to starter.
WARNING!
DO NOT USE STARTING FLUIDS. The preheat
system could cause the starting fluid to explode.
Starting fluids should never be used.
2. Engine Speed Control Dial

The engine speed is controlled by the dial. Rotating it
clockwise increases engine speed (rpm) and
counterclockwise decreases engine speed.
A Low idle (Lowest engine speed)
B High idle (Highest engine speed)
NOTE: The auto idle system will automatically reduce
engine speed to idle speed approximately four
seconds after all of the control levers are in the HAOA690L
neutral position. This system is designed to Figure 5
reduce fuel consumption and noise. See “3.
Auto Idle Selector Button” on page 2-35.

2-10
3. Quick Clamp Switch (Optional)
O
Clamp releasing for dispensable attachment is controlled. I
O. In this position , the quick clamp is "LOCKED."
The attachment is secured to the arm.
I. In this position , the quick clamp is

"UNLOCKED." The attachment is released from
the arm.
NOTE: To move the switch, pull up on the toggle FG001342
and then move it into the "UNLOCKED" Figure 6
position.
WARNING!
When the attachment is still connected to the
machine, while the switch is "I" ( ) position, do not
operate the machine or the attachment might fall to
the ground. It would cause personnel injuries.
4. Auxiliary Mode Switch

I O
When the control system is out of order, the pump
system can be controlled manually.
O. In this position, the manual pump control is
"OFF."
I. In this position, the manual pump control is "ON."
CAUTION! FG001343
Figure 7
Be sure to turn pump control to the "O" (OFF)
position, after the control system is operating
properly.
5. Engine Emergency Stop Switch

If the engine does not shut down when using the
O I
starter switch, it can be stopped by moving the engine
emergency stop switch to the "I" (EMERGENCY STOP)
position.
O. In this position, the engine emergency stop
system is "OFF."
I. In this position, "EMERGENCY STOP" is selected.
The engine will shut down. FG001344
NOTE: When released, the switch will return to its Figure 8
original position "O" (OFF) position.

2-11
6. Audio Control Panel
The audio system can be remotely controlled using this
panel. SCAN
PWR
FG000018
Figure 9
Each time this power button is pressed, the audio

system is turned either "ON" or "OFF."
If the audio system turns "ON," an indicator light above
the button turns "ON."
PWR
FG000019
Figure 10
Press the up button, to "INCREASE" volume.
FG000020
Figure 11
Press the down button, to "DECREASE" volume.
FG000021
Figure 12

2-12
Manual Scan: When pressing scan button once, for
less than half-a-second, the frequency will be moved
up in sequence to the next available signal.
Auto Scan: When pressing scan button for more than a
half-a-second, the frequencies are automatically
scanned to the next higher one and will continue until
the button is again pressed to stop the scan.
SCAN
FG000022
Figure 13
7. Travel Speed Selector Switch

O
I
WARNING! II
Do not operate the travel speed selector switch
when unit is in motion. Temporary loss of control
could result.
This switch activates the automatic speed range for FG000023

travel. Figure 14
O. In this position, "LOW" travel speed is selected.
I. In this position, "HIGH" travel speed is selected.
II. In this position, "AUTOMATIC" travel speed is
selected. The travel speed automatically changes
between "LOW" or "HIGH" range, depending on
engine speed and travel motor loads.
8. Light Switch
This switch is used to turn "ON" the lights. O
O. In this position, all lights are "OFF."
I
II
I. In this position, all illumination lights of the
instrument panel and the control switches are
turned "ON."
II. In this position, all illumination lights and work
lights are turned "ON."
FG000024
Figure 15
CAUTION!
Do not leave instrument panel or work lights "ON"
when the engine is not running. Leaving lights
"ON" with the engine shut down will discharge
batteries.

2-13
9. Breaker / Boost / Shear Selector
Switch I
This switch is used to either select the breaker, power
O
boost, or shear. II P
RU
WE
O. In this position, a hydraulic pressure rise will be PO
activated when pressing the button on the

right-hand work lever (joystick).
I. In this position, shear is activated.
FG000025
II. In this position, breaker is activated.
Figure 16
WARNING!
Before using any attachment in a work application,
be sure to check its functional control. Make sure
that the desired movement or action is being
activated by the control. e.g. opening/closing, CW/
CCW, crowd/dump, etc.
10. Cabin Work Light Switch (Optional)

This switch is used to control the cabin work lights, if O
unit is equipped with them. I
O. In this position, all cabin work lights are turned II
"OFF."
I. In this position, the front cabin work lights on the
front top of cabin will turn "ON."
II. In this position, the front cabin work lights on the
front top of cabin and rear cabin work lights on FG000026
rear top of cabin will turn "ON." Figure 17
11. Warning Light Switch (Optional)

If unit is equipped with a warning light, push this switch O
to activate it.
O. In this position, the warning light is turned "OFF." I
I. In this position, the warning light turns "ON" and
will start flashing.
FG000027
Figure 18

2-14
12. Lower Wiper Switch (Optional)
This switch is used to control the lower front window O
wiper.
O. In this position, lower windshield wiper is "OFF." I
I. In this position, lower windshield wiper runs at a
constant speed.
NOTE: Operating wiper without washer fluid or when
there is sand or dirt present will damage the
window and wiper. FG000028
Figure 19
13. Heater and Air Conditioner Control

Panel
This panel is used to control air conditioner and heater
A/C OUTSIDE
in operator's compartment. Refer to “Heater and Air AUTO
AUTO MAX
A/C
Conditioner Control Panel” on page 2-49 for more TEMP
details. OFF
SEL MODE
FG000029
Figure 20
14. Wiper Switch Panel

This panel is only for operation of the upper windshield
wiper. When the wiper stops running, it moves to right
side of the cabin, resting in its support.
NOTE: When the front window is lifted, the wiper motor
will not operate.
FG000308
Figure 21

2-15
Constant Speed Button
Pressing the button turns "ON" the windshield wiper.
An indicator light above the button will turn "ON"
indicating that the wiper is "ON." The wiper will run at
a constant speed.
Pressing the button again, turns "OFF" the windshield
wiper.
FG000241
Figure 22
Intermittent Speed Button

Pressing button once (first time):
Windshield wiper runs approximately on a three
second intermittent cycle. The left side indicator
light will turn "ON."
Pressing button again (second time):
Windshield wiper runs approximately on a six
second intermittent cycle. The right side indicator
light will turn "ON." FG000242
Pressing button again (third time): Figure 23
Turns "OFF" the windshield wiper. Both indicator
lights will be turned "OFF."
Windshield Washer Button

Pressing the washer button will spray windshield
washer fluid onto the windshield. Use only the proper
windshield washer fluid in the system.
NOTE: Do not operate the windshield washer without
any fluid. If operate without any fluid, the
washer motor may be damaged. Check level in
washer tank, and add fluid as required.
NOTE: Using soapy water or synthetic detergent
instead of window cleaning fluid, may damage FG000243
the wiper blade or painted surfaces. Use Figure 24
standard window cleaning fluid: SSK703

2-16
15. Cigarette Lighter
R
PW
Push the lighter all the way into the socket and release
your hand. After pushing it in, it will be ejected when it
is heated. If it does not eject after a short time, pull it
out and have it serviced.
NOTE: This cigarette lighter is for 24V only. Never
connect a 12V electrical device to the lighter.
FG000030
Figure 25
16. Power Socket for 12 Volt

This is a power socket for only 12V DC devices.
This socket can be used for charging a cellular phone
or powering a small 12V DC electrical device.
Open the cap when using it.
NOTE: This socket is designed for small electrical 12 V
capacity devices. Do not use this socket for
large electrical capacity devices. Thus, damage
can be avoided. HAAE1990
Figure 26
17. Travel/Swing Alarm Switch (Optional)

If unit is equipped with a travel/swing alarm buzzer, O
push this switch to active it, whenever swinging or I
traveling. II
O. In this position, the travel/swing alarm system is
turned "OFF."
I. In this position, the travel alarm will only sound,
when the machine is moving.
II. In this position, the travel/swing alarm will sound FG000031
while swinging and traveling, if equipped with a Figure 27
swing alarm device.
NOTE: If machine is only equipped with a travel
alarm device, the alarm will not sound
when swinging although the switch is in
the "II" position.

2-17
18. Overload Warning Switch (Optional)
If unit is equipped with an overload warning device, O
push this switch to activate it.
O. In this position, the overload warning device is I
turned "OFF."
I. In this position, when a load is lifted that reaches
the machine safe lifting limit, a warning light on
the instrument panel will turn "ON" and a warning
buzzer will sound.
FG000032
Figure 28
WARNING!
To prevent injury, do not exceed the rated load
capacity of the machine. If the machine is not on
level ground, load capacities will vary. There may
be local government regulations about the use of
excavators for lifting objects.
Please observe these regulations.
19. Fuel Heater Switch (Optional)

This switch is used to activate the fuel heater system. O
When the switch is activated, the fuel is warmed,
depending upon the temperature of the fuel. I
NOTE: If the fuel temperature is above 5°C (41°F),
heating system is not activated.
O. In this position, the fuel heater system is turned
"OFF."
I. In this position, the fuel heater system is turned FG000033
"ON." Figure 29
NOTE: The starter switch must be "ON."
20. Seat Warmer Switch (Optional)

If the seat is equipped with the optional seat warmer, O
push this switch to activate it.
When the seat is warmed, the warmer is automatically I
turned "OFF."
O. In this position, the seat warmer is turned "OFF."
I. In this position, the seat warmer is turned "ON."
NOTE: The starter switch must be "ON" with the engine
FG000034
running, for the heater to operate.
Figure 30

2-18
21. Horn Button (Left-hand Work Lever)
Press the lower button on the top of the left-hand work
lever (joystick) to sound horn.
NOTE: The starter switch must be "ON."
FG002084
Figure 31
22. Rotating Buttons

For a machine equipped with an attachment that
rotates, press the upper two buttons on the top of the
left-hand work lever (joystick) to rotate the attachment
clockwise or counterclockwise. Left button is for
counterclockwise and the right one is for clockwise.
WARNING!
FG000382
Before using any attachment in a work application, Figure 32
23. Booster Button (Right-hand Work

Lever)
Press the lower button on the top of the right-hand
work lever (joystick) to boost the hydraulic pressure.
Refer to the “Boost Mode” on page 3-22.
NOTE: This button works with the breaker/boost/shear
selector switch. See “9. Breaker / Boost / Shear
Selector Switch” on page 2-14.
FG000036
Figure 33

2-19
24. Shear Buttons
For a machine equipped with shear, press the two
upper buttons on the top of the right-hand work lever
(joystick) to open or close the shear. Left button is for
closing (crowd), right button is for opening (Dump).
NOTE: These buttons work with the breaker/boost/
shear selector switch. See “9. Breaker / Boost /
Shear Selector Switch” on page 2-14.
FG000383
WARNING! Figure 34
Before using any attachment in a work application,

25. Instrument Panel

CHECK
See “Instrument Panel” on page 2-22.

02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM
POWER
AUTO
1 2 3 4
ESC
5 6 7 8
FG000037
Figure 35
26. Safety Lever

See “Safety Lever” on page 3-13.
FG000038
Figure 36

2-20
27. Photo Sensor
The photo sensor detects the radiant energy of the
sun.
In auto mode the air conditioner will automatically
adjust the air temperature based on to the detected
radiant energy.
FG000399
Figure 37

2-21
INSTRUMENT PANEL
7 8 9 10 11 12
5 CHECK
02/05 [MO] 11:30

1
3
E F
4
2
C H C H
E/G SPEED 1700 RPM 17

15 6
19
13
POWER
AUTO
1 2 3 4
ESC
20
14 5 6 7 8
16 18
FG000039
Figure 38

2-22
Reference Reference
Number Number
1 Fuel Gauge 12 Work Light Indicator Light
2 Engine Coolant Temperature 13 Power Mode Selector Button
Gauge (See page 2-34)
3 Hydraulic Oil Temperature 14 Trenching Mode Selector
Gauge Button
4 Multifunction Gauge And (See page 2-35)
Graphic Information Area (See 15 Auto Idle Selector Button
page 2-29) (See page 2-35)
5 Digital Clock 16 Flow Control Button
6 Hour Meter (See page 2-35)
7 Charge Warning Light 17 Up Arrow Button
(See page 2-36)
8 Engine Oil Pressure Warning
Light 18 Down Arrow Button
(See page 2-37)
9 Engine Coolant Temperature
Warning Light 19 Display Selector Button
(See page 2-37)
10 Engine Check Warning Light
20 Selection Button
11 Preheat Indicator Light
(See page 2-37)
Functional check
When the engine starter switch is turned to the "I" (ON)
position, all gauge bands, switch/button indicator lights and
indicator/warning lights will turn "ON" and the alarm buzzer
will sound about two seconds.
During this functional check, a LOGO will appear on the
multi function gauge in the graphic information area (3 and
4, Figure 38).
Password Activated
If a password has already been set and the system has
been "LOCKED," the password display will appear on the
screen once the functional check has been completed. Enter
the password into the text area and then engage the starter.
NOTE: Refer to “Set Password (Lock and Unlock)” on
page 2-43, for further details.
CAUTION!
If the password does not match the stored password,
the engine will not start.

2-23
1. Fuel Gauge
Shows remaining fuel quantity in tank.
BLUE ZONE ( ) - Indicates a normal fuel quantity.
RED ZONE ( ) - Indicates that the fuel level is low.

If the gauge pointer moves into the red zone, the fuel
level symbol will turn "ON," and be display in the
screen. Stop operation and immediately and add fuel.
E F
NOTE: See “Abnormal State Warning Symbols” on FG000040
page 2-31, for location of this warning symbol Figure 39
and others.
Check the fuel level on firm, level ground.
2. Engine Coolant Temperature Gauge

The colored bands indicate the temperature of the
engine coolant.
WHITE ZONE ( ) - Indicates temperature is lower

than the normal operating temperature.
BLUE ZONE ( ) - Indicates temperature is within

the normal operating range. C H
RED ZONE ( ) - Indicates temperature is too high. FG000041
Figure 40
During operation, the pointer must be in the blue zone.
If the gauge pointer moves into the red zone, the
engine coolant temperature warning light will turn "ON,"
a warning buzzer will sound, and the engine speed will
be automatically reduced. Allow the engine to run at
low idle speed until the temperature gauge registers in
the blue zone again. When the blue zone is reached,
allow the engine to idle for an additional three - five
minutes before shutting down the engine. If not allowed
to idle, heat surge may develop which will damage the
engine. Allowing the engine to idle will dissipate heat.
Check the coolant level, look for a loose fan belt,
inspect for debris around radiator, and so on.
When the temperature reaches the normal range, the
engine speed will automatically recover.

2-24
3. Hydraulic Oil Temperature Gauge
The colored bands indicate the temperature of the
hydraulic oil
WHITE ZONE ( ) - Indicates temperature is lower

than the normal operating temperature.
BLUE ZONE ( ) - Indicates temperature is within

the normal operating range. C H
RED ZONE ( ) - Indicates temperature is too high. FG000042
Figure 41
During operation, the pointer must be in the blue zone.
If the gauge pointer moves into the red zone, the
hydraulic oil temperature symbol will turn "ON," and be
display in the screen. Allow the engine to run at low
idle speed until the temperature gauge registers in the
blue zone again.
NOTE: See “Abnormal State Warning Symbols” on
page 2-31, for location of this warning symbol
and others.
4. Multifunction Gauge and Graphic

Information Area 02/05 [MO] 11:30
See “Multifunction Gauge and Graphic Information” on

page 2-29. This section will have a more in-depth E F
explanation of the display area.
C H C H
E/G SPEED 1700 RPM

FG000043
Figure 42
5. Digital Clock
A digital clock, shows the current time. The displayed
contents are as follows.
Display Description
MM Month
MM/DD [W] HH:mm
DD Date
W Day
HH Hour
FG000044
mm Minute
Figure 43
A (P) AM (PM)
Refer to the “Setting Main Menu” on page 2-36 for

time setting.

2-25
6. Hour Meter
The hour meter is used to indicate the total number of
running hours on the engine. The meter will flash every
four seconds when the engine is running to indicate
that it is functioning properly.
HAOA601L
Figure 44
7. Charge Warning Light

This indicator light will turn "ON" when the engine
starter switch is turned "ON," and should go "OFF"
after the engine starts. If it does not turn "OFF," shut
the engine down immediately and determine the cause
of the problem.
HAOA610L
Figure 45
8. Engine Oil Pressure Warning Light

This indicator light will turn "ON" when the engine
starter switch is turned "ON," and should go "OFF"
after the engine starts. For example, if the engine oil
pressure becomes too low, the light will turn "ON" and
a warning buzzer will sound. If this happens, shut the
engine down immediately and determine the cause of
the problem. If you continue to work when this light is
"ON," it will result in serious engine damage.
HAOA620L
Figure 46
CAUTION!
If you continue to work when this light is "ON," it
will result in serious engine damage.

2-26
9. Engine Coolant Temperature Warning
Light
If engine coolant overheats, this light will turn "ON," an
alarm will sound, and the engine speed will be
automatically reduced, until coolant temperature drops.
Do not turn engine "OFF" because this will cause
coolant temperature to rise and may cause engine to
siege due to heat surge.
NOTE: Check the engine coolant temperature gauge. If
HAOD350L
the gauge pointer moves into the red zone, the
engine coolant temperature warning light will Figure 47
turn "ON," a warning buzzer will sound, and the
engine speed will be automatically reduced.
Allow the engine to run at low idle speed until
the temperature gauge registers in the blue
zone again. When the blue zone is reached,
allow the engine to idle for an additional three -
five minutes before shutting down the engine. If
not allowed to idle, heat surge may develop
which will damage the engine. Allowing the
engine to idle will dissipate heat. Check the
coolant level, look for a loose fan belt, inspect
for debris around radiator, and so on.
When the temperature reaches the normal
range, the engine speed will automatically
recover.
10. Engine Check Warning Light

This indicator light will turn "ON," when the engine
needs to be check.
NOTE: If this light turns "ON" stop the machine and
repair the cause of the fault.
CHECK
FG000045
Figure 48

2-27
11. Preheating Indicator Light
In cold weather this light indicates that the engine
preheat function is operating.
When this indicator light turns "OFF," it means that the
engine preheat cycle has been completed.
HAAE2000
Figure 49
12. Work Light Indicator Light

The indicator light indicates that the work lights are
turned "ON."
HB4O2003
Figure 50

2-28
MULTIFUNCTION GAUGE AND
GRAPHIC INFORMATION
When the engine starter switch is turned to the "I" (ON)
position, a LOGO will appear on the display screen for 02/05 [MO] 11:30
about two seconds.
When the LOGO disappears, the multifunction gauge and
graphic information screen will appear. E F
The engine rpm is normally displayed at the bottom of the

screen when the starter switch is first turned "ON." Each C H C H
time the display selector button (19, Figure 38) is pressed,

the digital readout changes in the following sequence; E/G SPEED 1700 RPM
Engine speed (RPM) -> Battery voltage (VOLT) -> Front FG000043
pump pressure (BAR) -> Rear pump pressure (BAR).
Figure 51
NOTE: See Figure 54 thru Figure 57.
A digital clock is located at the top of the display.
By using a combination of the mode selector buttons,
information for filters and oils can also be displayed.
The display can also be set for the desired language.
Refer to the “Setting Main Menu” on page 2-36 for the
language selection and information display sequences.
Communication Indicator
Indicates the condition of communication between main
controller and instrument panel.
1. Normal Condition:
The symbol will sequentially move like lightening.
NOTE: See Figure 54 thru Figure 57.
2. Abnormal Condition:
If the symbol is not displayed, it means there is a FG000047
communication error. Figure 52
NOTE: See Figure 53.

2-29
Communication Error Warning
If a communication error is generated between e-EPOS
controller and instrument panel, this symbol will be
displayed.
When this symbol is displayed, contact a DOOSAN
distributor or sales agency.
NOTE: If a communication error occurs during operation, the
last mode setting is stored. e.g. power mode, work
mode and auto idle are stored during failure.
FG000048
NOTE: When starter switch is turned to the "I" (ON) position Figure 53
during a state of communication error failure, the
e-EPOS controller will default to the following modes.
Power mode: Standard mode
Working mode: Digging mode
Auto idle: "ON" (Selection state)
Engine Speed
The engine speed is numerically displayed.
E/G SPEED 1700 RPM
FG000049
Figure 54
Battery Voltage
The battery voltage is numerically displayed. With the engine
running, the reading should be between 26V - 30V.
When the starter is engaged or the preheat system is being
used, the voltage can temporarily drop below 24V, but this
is a normal condition.
BATTERY 28.0 VOLT
FG000050
Figure 55

2-30
Front Hydraulic Pump Pressure
The front pump pressure is numerically displayed.
NOTE: This pump is closest to engine flywheel housing
or is the upper one of hydraulic pump.
It displays the reading in BARs. FRONT PUMP 320 BAR
FG000051
Figure 56
Rear Hydraulic Pump Pressure

The rear pump pressure is numerically displayed.
NOTE: This pump is the farthest from engine flywheel
housing or is the lower one of hydraulic pump.
It displays the reading in BARs. REAR PUMP 313 BAR
FG000052
Figure 57
Abnormal State Warning Symbols 6 5 4 3 2 1

1. Hydraulic Oil Overheating Warning
2. Pilot Filter Clogged Warning
3. Fuel Shortage Warning
E F
4. Return Filter Clogged Warning
5. Air Cleaner Clogged Warning C H C H
6. Overload Warning (Optional) E/G SPEED 1700 RPM

FG001088
Figure 58

2-31
Examples of Warning Display
02/05 [MO] 11:30 02/05 11:30
E F E F
E F
C H C H C H C H
C H C H
E/G SPEED 1700 RPM E/G SPEED 1700 RPM E/G SPEED 1700 RPM
FG000059 FG000060 FG000061
<2 kinds of warning display> <4 kinds of warning display> <6 kinds of warning display>
Figure 59
1. Hydraulic Oil Overheat Warning

If the hydraulic oil temperature is too high, this symbol
appears on the screen.
FG000056
Figure 60
2. Pilot Filter Clogged Warning

This symbol indicates when the pilot filter clogged.
If this symbol is displayed, immediately stop operation
and replace the pilot filter.
After the pilot filter has been serviced, restart machine
operation to remove the warning symbol.
FG000055
Figure 61

2-32
3. Fuel Shortage Warning
If the fuel quantity is too low, this symbol appears on
the screen.
If this light turns "ON," add fuel as soon as possible.
FG000057
Figure 62
4. Return Filter Clogged Warning

This symbol indicates when the hydraulic return filter is
clogged.
and replace the return filter.
After the return filter has been serviced, restart
machine operation to remove the warning symbol.
FG000054
Figure 63
5. Air Cleaner Clogged Warning

This symbol indicates when the air cleaner is clogged.
and replace or clean the air filter.
After the air filter has been serviced, restart machine
operation to remove the warning symbol.
FG000053
Figure 64

2-33
6. Overload Warning (Optional)
If the overload warning switch is turned "ON," and this
symbol appears on the screen and the warning buzzer
sounds, that indicates that overloaded condition is
occurring. Immediately reduce the load.
WARNING!
If this warning appears on the screen and a
FG000253
warning buzzer sound, reduce the load immediately.
Figure 65
If you continue to work, the machine can be turned
over or damage to hydraulic components and
structural parts could occur.
MODE SELECTOR BUTTONS 1 3
1. Power Mode Selector Button

POWER
2. Trenching Mode Selector Button AUTO
1 2 3 4
ESC
3. Auto Idle Selector Button
4. Flow Control Button
5 6 7 8
2 4
FG001338
Figure 66
1. Power Mode Selector Button

This power mode is suitable for heavy-duty work that
requires a high operating speed. Push this button to
turn power mode "ON" or "OFF."
When the power mode button is pushed to the "ON" POWER
position, an indicator light above it turns "ON."
When the power mode button is pushed again, it is 1
turned "OFF" and the power mode is deactivated and
returns to the standard operating mode.
FG000063
When turning the engine starter switch to the "I" (ON) Figure 67
position, the power mode is automatically defaulted to
"Standard Mode."
NOTE: For further details, see "“Mode Selection” on
page 3-20.

2-34
2. Trenching Mode Selector Button
This work mode is suitable for smooth trench or
smooth trench wall. Push this button to turn trenching
mode "ON" or "OFF."
When the trenching mode button is pushed to the "ON"
position, an indicator light above it turns "ON."
When the trenching mode button is pushed again, it is 5
turned "OFF" and the trenching mode is deactivated
and returns to the digging mode.
FG000064
When you turn the engine starter switch to the "I" (ON) Figure 68
position, the work mode is automatically defaulted to
"Digging Mode."
NOTE: For further details, see "“Mode Selection” on
page 3-20.
3. Auto Idle Selector Button

When the auto idle system is activated, the engine will
automatically reduce speed to "IDLE" approximately
four seconds after all of the control levers are in the
neutral position. This system is designed to reduce fuel
consumption and noise.
AUTO
When the auto idle selector button is pushed to the 2
"ON" position, an indicator light above it turns "ON."
When the auto idle selector button is pushed again, it
FG000065
is turned "OFF" and the engine speed will return to the
Figure 69
setting of the engine speed dial and will remain at this
speed despite control lever position, until the engine
speed dial is moved.
4. Flow Control Button

When the button is pushed, you can control the
hydraulic oil flow rate.
The flow control button is used to set the flow rate of
pump to match the installed tool/attachment for optimal
performance, without damaging it.
NOTE: For further details, see "“Flow Control” on 6
page 2-45.
FG000066
Figure 70

2-35
SETTING MAIN MENU
By using a combination of the selector buttons (Figure 72),
you can review and set the contents of the display screen.
02/05 [MO] 11:30
Items such as language, time and filter/oil information can
be checked, and if necessary, set with new information.
E F
C H C H
E/G SPEED 1700 RPM

FG000043
Figure 71
1 3
POWER
AUTO
1 2 3 4
ESC
5 6 7 8
2 4
FG001339
Figure 72
1. Up Arrow Button
Up arrow button ( ), is used to move a menu item
"Up" or to the "Left."
FG000068
Figure 73

2-36
2. Down Arrow Button
Down arrow button ( ), is used to move a menu item
"Down" or to the "Right."
FG000069
Figure 74
3. Display Selector Button (ESC -

Escape)
Display selector button ( ), is used to change the
displayed information on the screen. Each time the
display selector button is pressed, the digital readout
changes.
4
NOTE: When setting the main menu, this button is used ESC
as the menu / exit button (ESC). To access the
menus the button must be pressed and held for FG000070
three seconds. Figure 75
NOTE: When this button is used for menu / exit button,
it is used to access to main menu or return to a
previous screen from each submenu.
4. Selection Button
Selection button ( ), is used to set a menu or clear
the operating hour of filter/oil.
FG000071
Figure 76

2-37
Display Selection and Escaping
Display Selection
When the display button (Figure 77) is pressed for more
than three seconds, the main menu screen (Figure 79) is
displayed.
In the normal display screen, the engine speed (rpm),
battery voltage (volt), front pump pressure (bar), and rear
pump pressure (bar) can be displayed.
4
ESC
FG000070
Figure 77
ESC Button
The screen will return from the main menu to the normal 02/05 [MO] 11:30
display screen, by again pressing the "ESC" ( ) button.
NOTE: If more than twenty seconds are spent in any menu, E F

without changing the screen, it will return to the
normal display screen.
C H C H
E/G SPEED 1700 RPM

FG000043
Figure 78
Main Menu
MAIN MENU
The menu selection can be changed by pressing the "UP"
1. Language
( ) or "DOWN" ( ) buttons. The selected menu item will
be highlighted, and a cursor will appear by the menu item. 2. Set Clock
When the selected menu item is highlighted, press the
3. Filter / Oil Info
"SELECT" ( ) button to enter the next submenu. 4. Adjust Display
1. “Language” on page 2-39.
5. Set Password
: UP : DOWN : SELECT
2. “Set Clock” on page 2-39.
FG000072
3. “Filter / Oil Info” on page 2-40. Figure 79
4. “Adjust Display” on page 2-42
5. “Set Password (Lock and Unlock)” on page 2-43

2-38
Language
MAIN MENU
When the cursor is on "Language," press the "SELECT"
1. Language
( ) button. The language submenu will appear.
2. Set Clock
The desired language can be selected by using the "UP"
( ) or "DOWN"( ) buttons.
4. Adjust Display
The display can be set for the desired language.
5. Set Password
Press the "SELECT" ( ) button to set the selected
language.
FG000072
NOTE: If more than twenty seconds are spent in the menu, Figure 80
Set Clock
MAIN MENU
When the cursor is on "Set Clock," press the "SELECT"
1. Language
( ) button. The set clock submenu will appear.
2. Set Clock
NOTE: If more than twenty seconds are spent in the menu,
normal display screen. 4. Adjust Display
5. Set Password
FG000075
Figure 81
Setting Method
1. Move the cursor to desired number by using the SET CLOCK
"SELECT" ( ) button. When selected the number will
flash.
0 6 :0 5
2. Set the time by using the "UP" ( ) or "DOWN"( )
buttons.
2004 06/29
• "+" ( ), "-" ( ): Increase or decrease number.
• "MOVE" ( ): Confirm and move the cursor to : + : : MOVE
next number. FG000076
Figure 82
• "ESC" ( ): Exit to the main menu.

2-39
'00' Minute Setting
1. Simultaneously press the "SELECT" ( ) button and
SET CLOCK
"UP" ( ) button.
2. If the displayed time is 30 minutes or less, the clock 0 6 :0 5
will display the preceding hour.
2004 06/29
3. If the displayed time is more than 30 minutes, the
clock will display the succeeding hour.
4. When the preceding hour is more than 23, the day will : + : : MOVE
be increased. FG000076
Figure 83
Filter / Oil Info

MAIN MENU
When the cursor is on "Filter/Oil Info," press the "SELECT"
1. Language
( ) button. The filter/oil information submenu will appear.
2. Set Clock
4. Adjust Display
5. Set Password
FG000077
Figure 84
Each symbol can be selected by pressing the "UP" ( ) or

"DOWN" ( ) buttons. At the bottom of the screen the FILTER / OIL INFO
operating hour (Hrs) of each filter and/or oil is displayed.
1. Fuel Filter
Hrs : 0025
: UP : DOWN : RESET
FG000078
Figure 85

2-40
Menu Display Order and Icon Explanation
1. Fuel Filter 2. Air Cleaner 3. Engine Oil Filter 4. Hyd. Oil Filter
5. Pilot Filter 6. Engine Oil 7. Hydraulic Oil 8. Coolant Water

FG001358
Figure 86
Filter / Oils Operating Hour Reset

After changing a filter or oil, reset the operating hour to zero FILTER / OIL INFO
(Hrs: 0000). The next replacement period can than be easily
checked. The operating hours are only accumulated while
the engine is running.
On the filter / oil information screen, press the "SELECT"
( ) button and then the reset screen will be displayed. RESET?
YES : NO : ESC
On the reset screen, the operating hour can be changed to
zero hour (Hrs: 0000) by pressing the "SELECT" ( ). : UP : DOWN : RESET
HAAE1960
If the "SELECT" ( ) button is pressed, the reset will be Figure 87
completed. and the screen will be returned to the previous
menu.
If the "ESC" ( ) button is pressed, the screen will be

returned to the previous menu without being reset.
NOTE: If more than twenty seconds are spent in the menu,
The screen is returned to the main menu by pressing the
"ESC" ( ) button.

2-41
Adjust Display
MAIN MENU
When the cursor is on "Adjust Display," press the "SELECT"
1. Language
( ) button. The adjust display submenu will appear.
2. Set Clock
4. Adjust Display
5. Set Password
FG000080
Figure 88
The desired brightness adjustment can be selected by using

"UP" ( ) or "DOWN" ( ) buttons. Adjust Display
NOTE: When the equipment shipped, the default brightness 50%
is set to 50%. +
The screen is returned to the main menu by pressing the LCD TEST
"ESC" ( ) button. The display is then saved. LCD TEST
LCD TEST
: + :
FG000081
Figure 89

2-42
Set Password (Lock and Unlock)
Use extreme care when setting the password for starting the
engine. If a mistake is made when entering the number, and
the number is excepted by the system, as being correct,
that number will be the only one that will allow the security
system to be activated or deactivated.
Write your password down and keep it in a safe location.
Password numbers can only use numbers between 1 and 8.
The small number to the lower left of each button on the
instrument panel, indicates the number that will be entered
when that button is pressed. Numbers "0" and "9" are POWER
invalid choices. 1 2
AUTO
3 4
ESC
Example:
2785 is acceptable.
5 6 7 8
9024 is not acceptable.
HAAE2010
Figure 90
When the cursor is on "Set Password" press the "SELECT"

( ) button. The set password submenu will appear. MAIN MENU
NOTE: The screen can be returned to the main menu by 1. Language
pressing the "ESC"( ) button (3, Figure 72). 2. Set Clock
4. Adjust Display
5. Set Password
FG000227
Figure 91
Password inquiry menu will be displayed.

NOTE: The initial password is "1111."
SET PASSWORD
The password can be changed within ten minutes while the
starter switch is in "I" (ON) position.
ENTER
After changing password, be sure to use the changed PASSWORD
password.
CAUTION!
FG000228
Failure to enter correct password three times, will return Figure 92
normal display screen, and another attempt will not be
possible for ten minutes.
A three item menu will be displayed. The items are "LOCK,"

"UNLOCK," and "CHANGE PASSWORD." An item can be
selected by using the "UP" ( ) or "DOWN" ( ) buttons,
and then selected by pressing the "SELECT" ( ) button.

2-43
Press "ESC" ( ) button (3,Figure 72) for 1 more second, it
returns to main menu.
According to the selection of adoption (lock) or nonadoption
(unlock), the password function will be in working or SET PASSWORD
nonworking.
Lock
When you want to change a password, follow below
procedure. Unlock
1. Move the cursor to "Change Password." Change Password
2. Input desired 4 digits password using selector buttons
(at the first column). Input the same password one
more time (at the second column) : UP : DOWN : SELECT
FG000229
3. Select adoption (lock) or nonadoption (unlock) at set
password menu. Figure 93
NOTE: Keep in mind never to forget password.

NOTE: Please contact a DOOSAN distributor, if you
forget your password.

2-44
FLOW CONTROL
02/05 [MO] 11:30
The flow control is used to set the proper flow rate for an
optional attachment (If equipped). The flow control screen is
accessed directly from the normal display screen without E F
going through the main menu or any submenus.
C H C H
E/G SPEED 1700 RPM

FG000043
Figure 94
When the flow control button (Figure 70 and Figure 95) is

pressed at the normal display screen (Figure 94), the flow
control screen (Figure 97) will be displayed.
FG000066
Figure 95
Select a tool by using the breaker / boost / shear selector

switch. The symbol in the upper left corner of the display
screen will change according to the position that the selector I
switch is in. Compare the symbols shown in (Figure 97 and O
Figure 98). II P
RU
WE
PO
FG000025
Figure 96

2-45
Adjusting Flow Rate
FLOW CONTROL
Use "UP" ( ) or "DOWN" ( ) buttons to adjust flow rate.
"UP" ( ) button is used to increase a flow rate.

"DOWN" ( ) button is used to decrease a flow rate.
Flow Control Pump Flow Setting

Step (l/min)
0 48 : APPLY ESC: CANCEL
1 53 FG000254
Figure 97 Breaker
2 71
3 89
4 109
5 128
6 148
7 167
8 187
9 207
10 219
Pump flow setting is at rated engine speed, for only the

output of one pump. FLOW CONTROL
Pump displacement will vary according to changes in engine
rpm.
: APPLY ESC: CANCEL

FG000255
Figure 98 Shear
Escape
FLOW CONTROL
A. Press flow control button ( , Figure 95) to return to
normal display screen and save the flow rate setting.
B. If there is no adjustment for twenty seconds, the flow
control screen will return to the normal display screen.
: APPLY ESC: CANCEL

FG000254
Figure 99

2-46
OPERATION SELECTION
DISPLAY
In the monitor you can see the application that is currently
selected.
Power Boost Selection

02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM

FG000257
Figure 100
Breaker Selection
02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM

FG000258
Figure 101
Shear Selection
02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM

FG000259
Figure 102

2-47
Overload Alarm Selection (Optional)
02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM

FG000260
Figure 103
Quick Clamp Operation Selection

(Optional) 02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM

FG000388
Figure 104

2-48
HEATER AND AIR CONDITIONER
CONTROL PANEL
Location of Controls and Vents
FG000288
Figure 105
The heater and air conditioner are combined into one unit in
the rear cover behind the operator's seat.
The operator can control cabin temperature using the control
panel installed in the switch panel.

2-49
Control Panel
1 3 10 7 8
A/C OUTSIDE
AUTO A/C
AUTO MAX
TEMP
OFF
SEL MODE
2 4 5 6 9
FG000086
Figure 106
Reference Reference
Number Number
1 Automatic Temperature Control 6 Air Inlet Selector Button
Button 7 Fan Speed Selector Button
2 Off Button 8 Air Conditioner Button
3 Temperature Control Button 9 Defroster Button
4 Temperature Unit Selector 10 LCD Display
Button
5 Air Outlet Selector Button
NOTE: When the light switch is turned to "I" or "II" position,

the LED for illuminating in the control panel will turn
"ON."
1. Automatic Temperature Control Button

This button is used to control the temperature level in
the cabin, according to the temperature setting of the
operating panel.
When the automatic temperature control function is
activated, the word "AUTO" will be displayed in the AUTO
upper left of LCD display.
When the system is in "AUTO" mode, specifications
can be manually changed by pushing another button.
FG000088
If a function is manually changed, the word "AUTO"
does not appear in the LCD display, but the Figure 107
unchanged functions will remain in "AUTO" mode.

2-50
2. Off Button
This button is used to stop the fan and air conditioner.
OFF
FG000089
Figure 108
3. Temperature Control Button

These buttons are used to control the cabin
temperature.
Temperature is adjustable from 17°C (62°F) to 32°C
(90°F) by 0.5°C (1°F) increments.
TEMP
Temperature setting is displayed on the LCD.
When the system is turned "ON," the previously set
temperature is used as a starting point.
FG000090
Figure 109
4. Temperature Unit Selector Button

This button gives the choice to select either °C or °F.
SEL
FG000094
Figure 110

2-51
5. Mode Selector Button
This button is used to select which combination air
outlets will be used.
MODE
FG000096
Figure 111
A. Used to direct air flow to upper portion of

operator's cabin from both the front and rear.
FG000099
Figure 112
B. Used to direct air flow to upper portion of

operator's cabin from both the front and rear. It
will also deliver air to the lower portion of
operator's cabin from under the operator's seat.
FG000097
Figure 113
C. Used to direct air flow to lower portion of

operator's cabin and feet.
This mode is mainly used for heating.
FG000100
Figure 114

2-52
D. Used to direct air flow to the front window and to
operator's feet.
FG000098
Figure 115
6. Air Inlet Selector Button

This button is used to select fresh air from outside the
cabin, or recirculate air within the cabin.
Pressing this switch enables the choice between fresh
air and recirculating air within the operator's
compartment. The select mode is displayed on the
LCD.
FG000101
Figure 116
A. "A" Symbol - Draws fresh air into operator's

compartment. Used to exchange air within the
operator's compartment with fresh air. Used to
remove condensation or ice on window (Winter /
Rainy Season).
A B
B. "B" Symbol - Recirculates air within the operator's
compartment. Used to quickly warm or cool the
operator's cabin.
FG000102
Figure 117
7. Fan Speed Selector Buttons

These buttons are used to control the speed of the
blower fan.
Momentarily, pressing a button, changes the speed one
stage.
Continuously pressing and holding a button, repeatedly
changes the speed.
FG000103
Figure 118

2-53
8. Air Conditioner Button
This button is used to turn the air conditioner "ON" or
"OFF."
When this function is activated, an "A/C" is displayed in
the upper left corner of the LCD.
A/C
FG000105
Figure 119
9. Defroster Button
Used to direct air flow to front window.
FG000106
Figure 120
10. LCD Display

This display shows the current setting.
A/C OUTSIDE
Memory Function AUTO MAX
The air conditioner panel has a memory function. When the

starter switch is turned "OFF" the settings for the panel, will
be stored. When the excavator is started, the last stored
setting will be used.
FG000107
Figure 121
Additional Operating Instructions
A proper indoor temperature in summer is 5 - 6°C (10 -
12°F) less than the outdoor temperature.
Operate the air conditioner for twenty - thirty minutes a
week to circulate the refrigerant in the system.
NOTE: The blower button should be on "Three Bars."
If operating the air conditioner or heater for a long time,
operate the air inlet selector button, and when smoking, vent
the air to the outside to prevent irritation to eyes.

2-54
STEREO
Before operating the stereo or CD player, read operation
manual enclosed with stereo.
Stereo
2 3 7 9 8 5
PROGRAM
AST
SOUND AM/FM SCAN
N-
OFF 1 2 3
VO M
USH O
LU
E TUNE
P
4 5 6
1 4 10 6
FG000108
Figure 122
Reference Reference
Number Number
1 Power / Volume Control 6 Preset Station
2 Sound Mode Selector 7 Tape Ejection
3 Band Selection 8 Fast Forward / Rewind
4 Tuning Up / Down 9 Tape Loading Slot
5 Scan Function / Auto Store 10 LCD

2-55
CD Player (Optional)
AST/DIR
FG000109
Figure 123

2-56
MISCELLANEOUS ELECTRICAL
DEVICES
Cabin Light
A light is installed on the top of the operator's compartment.
The light will work despite starter switch position.
NOTE: If light is left "ON" for a long time while the engine is
not running, the battery will be discharged.
FG000417
Figure 124
Pilot Cutoff Switch

When the safety lever is put into the "LOCK" position, the
switch deactivates the work and travel levers. With the work
and travel levers deactivated, no digging/operational work
can be done.
FG000211
Figure 125
Circuit Breaker
A main circuit breaker is in the battery box. It will
automatically cut off in case of an electrical short circuit or
overload. This will prevent the electric wiring and
components from being burned or damaged.
If the circuit breaker is cut off, check all related circuits, this
means something is wrong in the electric circuit.
After maintenance, press the red button for normal operation
of circuit breaker. HAAE2110
Figure 126

2-57
Fusible Link
A fusible link is in the battery box.
A
If the engine does not crank, first check that the starter
switch is turned "ON" and that no power is available (No
indicator lights will light.). Check that the "A" portion (Figure
127) of the fusible link is not broken or burned through.
Replace the fusible link if damage and investigate cause.
WARNING! Figure 127

HAAE2120
When changing the fusible link, replace the fusible link

with the same capacity part. Otherwise, a fire could
break out in the wiring harness and/or other components
of the circuit. Always use original DOOSAN parts.
Fuse Boxes
There are two fuse boxes (Figure 128) on the left side of
the heater box. The fuses prevent electrical devices from
overloading or shorting.
A decal attached to the inside of the fuse box access cover
indicates the function and amperage of each fuse.
NOTE: For a further explanation see “Fuse Boxes” on
page 4-73.
Spare fuses are mounted on the inside of fuse box access FG000110
cover. Figure 128
Change a fuse if the element separates. If the element of a
new fuse separates, check the circuit and repair the circuit.
CAUTION!
Always replace fuses with the same type and capacity
fuse that was removed. Otherwise, electrical damage
could result.

2-58
SEAT ADJUSTMENT
WARNING!
Adjust the seat position before starting operations or
after changing the operator.
Always fasten your seat belt while operating machine.
Adjust the seat so that the control levers and pedals
can be operated freely and easily with the operator back
against the backrest.
1. Forward / Backward Adjustment

Holding lever (1, Figure 129), raise it up, move the
seat to the desired position. Release lever to lock the
seat in the selected position. Adjustment range is
200 mm (7.9 in).
4 2
2. Seat Tilt and Height Adjustment
1
3 FG000183
Forward Tilt
Figure 129
Push lever (2, Figure 129) down to adjust the angle of
the front of the seat. There are four positions that it
can be set at.
Rear Tilt
Pull lever (2, Figure 129) up to adjust the angle of the
rear of the seat. There are four positions that it can be
set at.
Seat Height
It is possible to move the seat up or down by
combining adjustments forward and rear tilt. Adjust the
seat according to operator's size and work conditions.
Height adjustment is 60 mm (2.4 in).
3. Suspension Adjustment
Turning knob (3, Figure 129) to right makes the
suspension harder. Turning knob to left makes the
suspension softer. Adjust according to operator's weight
by checking the weight indicator dial. Adjustment range
is from 50 - 120 kg (110 - 265 lb).

2-59
4. Reclining Position Adjustment
Pulling up the right lever (4,Figure 129) allows the seat
backrest to be moved forward or backward.
Sit with your back against the seat back when
adjusting it. If your back is not touching the seat back,
the seat back may suddenly move forward.
5. Armrest Angle Adjustment

The angle of each armrest can be adjusted by turning 7
a dial (5, Figure 130) on bottom of armrest. When
adjusting the angle, manually raise the armrest before 9
turning the dial.
5
8
6. Lumbar Support Adjustment 6
A lumbar support is located in the seat back.

Turn the dial (6, Figure 130) counterclockwise to
increase the force of the lumbar support FG000778
Figure 130
7. Headrest
The headrest (7, Figure 130) can be adjusted forward/
backward and up/down. Move it by holding both sides.
8. Seat Belt
WARNING!
The seat belt is for the operator's safety and
should always be worn. Before driving the machine,
adjust the seat to the desired position for maximum
comfort and machine control, then fasten the seat
belt. Seat belts must be worn across the pelvic
region and adjusted snugly to lessen the chance
and severity of injury in case of an accident. Never
fasten a seat belt across the abdomen.
Under no circumstances should the operator be
standing in the cabin when operating the excavator.
Do not adjust the seat position while the vehicle is
moving because a loss of control may result. Stop
the machine, apply the parking brake, and then
adjust the seat.
Always, check the condition of seat belt and belt
bracket before fastening it. Do not use it with twists
in it. Replace belt or bracket if damaged or worn.

2-60
Seat Belt Locking and Unlocking
Insert belt end (1, Figure 131) into the buckle (2). Pull
the belt to check that belt end is locked into buckle.
Adjust belt length so that it comfortably tight against
the operator's pelvic region (hipbone).
HAOB140L
Figure 131
Press the button (3, Figure 132) in the center of buckle

(2) and pull out belt (1) to unlock.
HAOB150L
Figure 132
9. Seat Back-pocket
The seat has a seat back pocket. It is used for storing
the operation and maintenance manual.
10. Left and Right Control Stand

Adjustment
For operator's convenience, the right and left control
stands and seat can slide together, within a 160 mm
(6.3 in) forward or backward travel distance.
Holding lever (10, Figure 133), raise it up, set the seat 11
to desired position. Release lever to lock the seat in
the selected position. 10
FG000185
Figure 133
11. Left and Right Control Stand Height
Adjustment
The left and right dials (11, Figure 133) at the lower
part of the seat can be turned to adjust the elevation
height of each control stand.
It can be used to adjust the height of the control
joystick.

2-61
12. Air Suspension Seat (Optional)
12
The operator seat is also available with air suspension
for even better comfort. The switch (12, Figure 134) in
the middle of the seat can be used to adjust the air
cushion. If the switch is pressed, the seat become
harder, and pulling it out makes the seat softer, when
the air is bleed out.
FG000187
Figure 134
13. Heating the Operator's Seat

(Optional) O
The air suspension seat can be heated. The switch on
the left control stand is used to warm the seat. When I
heating is not needed or seat is warmed, turn the
switch to "OFF" position.
FG000034
Figure 135

2-62
CEILING COVER
NOTE: If the machine is equipped with the optional
transparent ceiling cover never use any chemical
cleaners on its surface. Only use warm water to wash
dust and dirt from its surfaces, and after that, dry it
with a soft fabric towel.
Opening the Ceiling Cover

FG000189
1. Lower bucket to ground. Figure 136
2. Set safety lever (Figure 136) on "LOCK."
3. Pull the lock (1, Figure 137) in front center of ceiling
cover and push it up with handle.
Closing the Ceiling Cover

1. Lower bucket to ground.
2. Set safety lever (Figure 136) on "LOCK."
3. Pull down cover with the handle (Figure 137) so that
the lock (1) can be locked in the bracket in the ceiling
frame.
1
FG000190
Figure 137

2-63
FRONT WINDOWS
WARNING!
When leaving operator's seat, set the safety lever to
"LOCK" position (Figure 138), if not a serious accident
could occur by accidentally moving the work levers.
Front Upper Window

FG000189
The front upper window can be housed in the cabin's Figure 138
ceiling.
Opening the Window
WARNING!
2
When stowing front window in the cabin roof, make
sure both release levers (1, Figure 139) are latched.

1
2. Set safety lever (Figure 138) on "LOCK." FG000192
3. Set engine speed control dial to "LOW IDLE." Allow Figure 139
engine to idle for three - five minutes.
4. Shut down engine by turning key to "O" (OFF) position.
5. Hold the window handles (1, Figure 139), then pull the
lock levers (2) to release the lock. The top of the front
window will come out.
6. Pull window up, and push it against lock pin at the
rear of the cabin. Make sure that it is securely latched.
7. Check that lock levers are securely latched in the lock
position.
NOTE: When the front upper window is open, never
extend your head or body through the window
frame.
NOTE: If the window happens to fall with a strong
impact against the machine, while some part of
your body is extended out of the cabin, it may
result in bodily injury.

2-64
Closing the Window
WARNING!
Be careful that your hands are not caught in window
frame.

1
2. Set safety lever (Figure 138) on "LOCK," and shut 2
FG000193
down engine. Figure 140
3. Holding upper handles (1, Figure 140) of front window
with left and right-hand, pull lock levers (2, Figure 140)
to release the lock.
4. Push window forward, and lower it slowly.
5. When the bottom of the window, reaches the top of the
front bottom window, push the front window to engage
the lock (2, Figure 139).
6. Check that lock levers are securely latched in the lock
position.
Front Bottom Window

1
The front bottom window can be removed and stored in the
rear of the cabin.
1. After stowing the front upper window in the cabin
ceiling, remove bottom window (1, Figure 141) from
cabin in direction of the arrow.
FG000194
Figure 141
2. Set bottom window in rubber holders (2, Figure 142)

behind operator's seat. Secure window with left and
right knobs (3) with push button (4). 3
4
WARNING! 2
Never have wet hands when handling a window.

Never drop window or let it come into contact with
other parts of the machine.
FG001345
Figure 142

2-65
DOOR SIDE LATCH
1. The door side latch (1, Figure 143) is used to secured
the door to the side of the cabin when it is opened.
NOTE: Keep the door closed and locked when machine
is not in use.
FG000196
Figure 143
2. To release door from side of cabin, push the latch

lever (2, Figure 144) down. The latch lever is to the
left of the operator's seat.
FG000673
Figure 144

2-66
CABIN STORAGE
2
COMPARTMENTS
There are two storage compartments behind the operator's
seat.
The large compartment (1, Figure 145) is for storing
nonperishable items.
The covered other one (2, Figure 145) is interconnected with 1
the air conditioner. So, it can be supplied with either warm FG000209
or cool air when air conditioner is turned "ON." Figure 145
There is a separate small tray (3, Figure 146) on the right

side of operator's seat.
3
FG000675
Figure 146
ASHTRAY
An ashtray (1, Figure 147) is to the right side of the
operator's seat on the side of the cabin. Always close
ashtray after putting out a cigarette. 1
FG000200
Figure 147

2-67
SUN VISOR
The sun visor can be used to reduce the amount of sunlight
coming through the front window and ceiling.
When wanting to reduce the amount of sunlight coming in
the front window, pull bar (1, Figure 148) down.
2
When not wanting protection, hold the bar with left-hand and
push the release button (2, Figure 148) with right-hand. This
will allow the visor to retract.
1
NOTE: Do not allow the visor to roll back up without holding FG000201
it. Not holding it may result in damage to the visor and Figure 148
retract mechanism.
Ceiling sun visor (3, Figure 149) slides forward and
backwards.Move it with handle (4) on each side.
4
3
FG000676
Figure 149
When opening the ceiling cover (if equipped), push the sun
visor into its compartment (Figure 150).
FG000204
Figure 150
HANGER
A hanger (1, Figure 151) is located on the upper left side of
the operator's compartment.
WARNING!
Do not hang anything that will easily fall down, or will 1
impair your view out of the cabin.
FG000210
Figure 151

2-68
CUP HOLDER
There is a cup holder on the right side of the compartment
(1, Figure 152). Open the access cover and lower it to a
horizontal position.
1
FG000205
Figure 152
DOOR WINDOW HOLDER

1
When the machine is being operated with the cabin door
window opened, window vibration can be reduced by
tightening knob (1, Figure 153) against the window.
FG000206
Figure 153
EMERGENCY GLASS
BREAKING TOOL
The excavator is equipped with a glass breaking tool. It is to
the upper right corner of the cabin. This tool can be used in
case of an emergency situation which requires the breaking
of glass to exit from the cabin. Grip the handle firmly and
use the sharp point to break the glass.
FG000178
WARNING! Figure 154
Protect your eyes when breaking the glass.

2-69
MISCELLANEOUS ACCESS
COVERS AND DOORS
Side Door
Open the side access door and slide prop rod (1, Figure
155) in slot (2) until it locks at the end of slot. 1
2
FG000165
Figure 155
Battery Box Door

1
Opening
Open door until locking device (1, Figure 156) latches.
Closing
While holding door, press locking device to release lock and
close door.
FG000166
Figure 156
Engine Cover
2
Open the cover and slide prop rod (1, Figure 157) in the
slot (2) until it locks in notch at the end of slot to support
the cover. 1
To close cover, move end of prop rod out of notch so it can
slide in slot.
FG000167
Figure 157

2-70
OP000483
3Operation
TO HANDLE A NEW
EXCAVATOR
All DOOSAN Daewoo excavators are inspected and adjusted
before leaving the factory. However, it is required that the
operator follow these steps during the initial break-in period.
Failure to follow these steps may result in damage to the
equipment or reduced performance.
Hour Load
For first 50 hours of opera- Maintain about 80% load of
tion. full capacity (Engine rpm:
80% of rated rpm)
After first 50 hours of opera- Full load
tion.
If machine is used at full load before it is broken in, it may affect

the life cycle and safe running operations. This could lead to
problems later.
NOTE: 1. Check daily for leakage of coolant, fuel, engine
oil and hydraulic oil.
2. Inspect all lubricants daily, add appropriate
lubricants as required.
3. During operation, monitor all instruments and
gauges from time to time.
4. Avoid an extreme engine load.
5. Operate unit at 80% load until engine and all
other components are at operating temperature.
6. Check that work equipment is operating
normally during operation.
7. Check machine for loose parts or for damage
that may have occurred during shipping.
8. Check for loose wiring or terminals, check
gauge operation and battery electrolyte level.
Operation OP000483
3-1
Lubrication and Filters
1. Change engine oil and replace oil filter after first 50 hours
of operation.
2. Change swing reduction device oil after first 250 hours of
operation.
3. Change hydraulic oil return filter after first 250 hours of
operation.
4. Replace travel and reduction gear oil after first 250 hours
of operation.
NOTE: For the replenishment of oil or grease, refer to
“Inspection, Maintenance and Adjustment” on
page 4-1 of this manual.
STARTING AND STOPPING THE

ENGINE
Inspection Before Starting Engine
WARNING!
If a flammable materials such as leaves, paper, etc. are
allowed to accumulate on high temperature components,
such as the engine muffler and turbo, a fire may occur. Fuel,
lubricant and hydraulic oil leaks, may cause a fire. If there is
anything wrong, perform the appropriate corrective action.
Before starting engine, inspect the following items;

1. Electric system - Check for damaged electric cables, and
loose or missing connectors.
2. Fuel system - Drain water and sediment from fuel tank and
water separator.
3. Hydraulic system - Check for hydraulic oil leaks, damaged
tubing and hoses, and interference points of components.
4. Lubrication - Perform all daily and periodic maintenance
services. Perform services according to reading shown on
hour meter.
5. Safety - Perform a machine walk-around. Make sure that
no one is under the machine or performing any
maintenance on it, before starting engine.
6. After starting machine - Check that all operational controls
and components, are in proper operating condition, and
are functioning correctly. Stop operation and correct any
malfunction before continuing work.
Operation OP000483
3-2
Operational Checks Before Starting
Engine
WARNING!
When leaving operator's seat, set the safety lever to
"LOCK" (Figure 1) position, if not a serious accident
could occur by accidentally moving the travel or work
levers. FG000211
Figure 1
1. Set safety lever on "LOCK" (Figure 1).
2. Fasten seat belt. Check for proper operation and condition.
3. Set all operation levers in "NEUTRAL."
NOTE: Be careful not to touch any switches when
starting engine.
4. Rotate the starter switch to the "I" (ON) position
(Figure 2). Check all indicator lights. A warning buzzer
will sound for about two seconds. After two seconds,
O I
all lights except the following will turn "OFF."
• Charging warning light
• Engine oil pressure warning light
• Engine coolant temperature gauge
• Fuel gauge
• Hydraulic oil temperature gauge FG000084
Figure 2
• Engine rpm (0 rpm) digital readout
NOTE: If all of the indicator lights do not come "ON"
when the key is first turned, there is a problem.
Operation OP000483
3-3
Engine Start
WARNING!
Start the engine after sounding horn and making sure that
there are no people or obstacles in the area.
1. Perform all steps in “Operational Checks Before

Starting Engine” on page 3-3.
2. Set engine speed control dial slightly above "LOW
IDLE" (Figure 3).
3. Sound horn.
HAOB34L
Figure 3
4. Enter password.
NOTE: If the security system is "LOCKED," a four-digit 02/05 [MO] 11:30
password will be required to start the engine. If the
system is "UNLOCKED," no password will be ENTER
required and this display screen will not appear. PASSWORD
E F
C H C H
E/G SPEED 0 RPM

FG001445
Figure 4
" "
5. Turn starter switch to (START) position (Figure
5). Engine should start in approximately five seconds. O I
WARNING!
If the engine does not start after approximately fifteen
seconds of cranking, release the starter switch. Wait
about five minutes and repeat above step.
6. After engine has started, release key. Key will return to the FG000085
"I" (ON) position (Figure 5). Figure 5
7. Follow procedures in “Hydraulic System Warm-up” on

page 3-9.
Operation OP000483
3-4
8. After warming unit, check all operating indicators to make
sure that all engine systems (oil pressure, coolant, etc.) are 4 5 6 7
in the normal operating range. If any problems are noticed,
shut down engine. Normal indicators are: CHECK
02/05 [MO] 11:30
1 3
E/G SPEED 1700 RPM

FG000092
Figure 6
INDICATOR
No. INSTRUMENT PANEL LIGHT OR GAUGE
READING
1 Engine Coolant Temperature Gauge Blue Range
2 Fuel Gauge Blue Range
3 Hydraulic Oil Temperature Gauge Blue Range
4 Charging Warning Light OFF
5 Engine Oil Pressure Warning Light OFF
6 Engine Coolant Temperature Warning Light OFF
7 Engine Check Warning Light OFF
9. Check color of exhaust smoke.

• No color or light blue - Engine is running in good
condition.
• Black - Incomplete combustion. Check cause.
• White or dark blue - Engine is burning engine oil.
Check cause.
10. Check for usual engine vibration and noises. If any are
heard or felt, investigate cause.
NOTE: If engine coolant temperature gauge pointer
moves into the red zone, the engine coolant
temperature warning light will turn "ON," a
warning buzzer will sound, and the engine
speed will be automatically reduced. Allow the
engine to run at low idle speed until the
temperature gauge registers in the blue zone
again. When the blue zone is reached, allow the
engine to idle for an additional three - five
minutes before shutting down the engine. If not
allowed to idle, heat surge may develop which
will damage the engine. Allowing the engine to
idle will dissipate heat. Check the coolant level,
look for a loose fan belt, inspect for debris
around radiator, and so on.
Operation OP000483
3-5
Cold Weather Starting
WARNING!
DO NOT USE STARTING FLUIDS. The preheat system could
cause the starting fluid to explode. Starting fluids should
never be used.
1. Perform all steps in "Operational Checks Before Starting

Engine."
2. Set engine speed control dial slightly above "LOW
IDLE" (Figure 7).
3. Sound horn.
HAOB34L
Figure 7
4. Turn starter switch to the "I" (ON) position (Figure 8).

When preheat cycle is completed, the preheat indicator
light (1, Figure 9) will turn "OFF."
O I
FG000084
Figure 8
CHECK
FG000217
Figure 9
Operation OP000483
3-6
5. After the preheat completion, immediately turn starter
switch to " " (START) position (Figure 10). Engine O I

should start in approximately five seconds.
WARNING!
If the engine does not start after approximately fifteen
seconds of cranking, release the starter switch. Wait
about five minutes and repeat above step. FG000085
Figure 10
6. After engine has started, release key. Key will return to
the "I" (ON) position (Figure 10).
7. After the engine starts, check all operating indicators to
make sure that all engine systems (oil pressure,
coolant, etc.) are in the normal operating range. If any
problems are noticed, shut down engine.
8. Follow "Hydraulic System Warm-up" procedures in this
section. (See page 3-9)
Starting Engine With a Booster Cable
WARNING!
1. An explosive gas is produced while batteries are in
use or being charged. Keep flames or sparks away
from the battery area.
2. Charge batteries in a well ventilated area.
HAOA440L
3. Always wear eye protection when starting a machine
Figure 11
with jumper cables.
4. Improper jump starting procedures can cause an
explosion resulting in personal injury.
5. Jump start vehicles on dry ground or concrete. Do not
jump start the machine on a steel floor, because the
floor is always grounded.
6. When starting from another machine, make sure the
machines do not touch.
7. Always connect the auxiliary battery positive (+)
terminal too depleted battery positive (+) terminal first.
Then connect auxiliary battery negative (-) terminal to
the frame of the depleted battery machine second.
8. Connect positive cable first when installing cables and
disconnect the negative cable first when removing.
Operation OP000483
3-7
IMPORTANT
The machine has a 24V (-) negative ground electrical
system. Use the same capacity 24V booster batteries when
jump starting engine.
If the batteries are drained during starting procedures, jump

start engine using auxiliary or booster batteries according to
the following procedure;
Connecting the Booster Batteries

1
1. Shut down engine of the machine on which booster RED
batteries (3, Figure 12) are mounted.

2. Connect one end of red cable (1, Figure 12) to the
positive (+) terminal of the machine batteries (4), and
the other end to the positive (+) terminal of the booster
batteries.
3 4
3. Connect one end of black cable (2, Figure 12) to the BLACK
negative (-) terminal of the booster batteries (3), and 2 5

then make ground connection to the upper frame (5) of ARO0440L
the machine to be started with the other end of black Figure 12
(-) cable (2, Figure 12). When making the last
connection to upper frame, be sure to connect the
cable end as far away from the machine batteries as
possible. DO NOT CONNECT DIRECTLY TO THE
NEGATIVE BATTERY TERMINAL.
4. Start the engine.
Disconnecting the Booster Batteries

1. Disconnect black negative (-) cable (2, Figure 12) from
the machine frame (5) first.
2. Disconnect the other end of black negative (-) cable (2,
Figure 12) from the booster batteries (3).
3. Disconnect red positive (+) cable (1, Figure 12) from
the booster batteries (3).
4. Disconnect red positive (+) cable (1, Figure 12) from
the machine batteries (4).
Operation OP000483
3-8
Hydraulic System Warm-up
WARNING!
If a problem or abnormal operation occurs, immediately
shut down engine. Allow excavator to reach normal
operating temperature before starting work, especially in
cold weather.
The correct operating temperature of the hydraulic oil is 50°

- 80°C (120° - 175°F). Make sure to follow the procedures
listed here for hydraulic fluid warm-up.
1. Run engine for approximately five minutes set at the
middle of the speed range, without a load.
HAOB410L
Figure 13
2. Set safety lever (1, Figure 14) on "UNLOCK" position.
FG000093
Figure 14
3. Slowly cycle boom, arm and bucket cylinders about five

times without a load to circulate the oil through the
system. Do this for five minutes.
4. Check for clearance and fully raise the front
attachment. Swing clockwise 3 revolutions. Swing
counterclockwise 3 revolutions.
5. Travel forward and reverse at low speed for two
revolutions of the drive sprocket.
FG000380
Figure 15
Operation OP000483
3-9
Hydraulic System Warm-up – Cold
Weather
1. Run engine at "LOW IDLE" (no load) for five minutes
(Figure 16).
HAOB290L
Figure 16
2. Run engine for approximately five minutes set at the

middle of the speed range, without a load (Figure 17).
HAOB410L
Figure 17
3. Set safety lever (1, Figure 18) on "UNLOCK" position.
FG000093
Figure 18
4. Slowly cycle boom, arm and bucket cylinders about five

times without a load to circulate the oil through the
system. Do this for five minutes.
FG000380
Figure 19
Operation OP000483
3-10
5. Set engine speed control dial to "HIGH IDLE" (Figure
20).
6. Repeat Step 4 for five minutes. If working speeds
continue to be slow, continue to operate, but use
extreme caution because the machine function may be
erratic.
7. Check for clearance and fully raise the front
attachment. Slowly swing clockwise 3 revolutions.
Slowly swing counterclockwise 3 revolutions.
8. Travel forward and reverse at low speed for two HAOB550L
revolutions of the drive sprocket. Figure 20
Engine Shut Down

NOTE: Allow engine to idle for three - five minutes before
shutting down the engine. If not allowed to idle, heat
surge may develop which will damage the engine.
Allowing the engine to idle will dissipate heat.
1. Park excavator on level and firm ground.
2. Lower front end attachment to ground and make sure
all operating controls are in "NEUTRAL."
FG006915
Figure 21
3. Set safety lever on "LOCK" position (Figure 22).
Unlock
lock
FG001091
Figure 22
4. Set engine speed control dial to "LOW IDLE" (Figure

23). Allow engine to idle for three - five minutes.
HAOB290L
Figure 23
Operation OP000483
3-11
5. Shut down engine by turning key to "O" (OFF) position
(Figure 24). O I
6. Remove key from starter switch.
Check and Confirmation After Stopping

Engine
1. Repair excavator, if there are any coolant or oil leaks.
2. Inspect front attachment and under carriage for FG000390
abnormal appearances. Correct any problems. Figure 24
3. Fill fuel tank.
4. Get rid of any accumulated flammable materials such
as leaves and paper etc. in engine compartment.
5. Clean all mud, etc. from undercarriage and tracks.
Make sure that all steps and hand holds are clean,
and that the operator's compartment is clean.
Operation OP000483
3-12
SAFETY LEVER
WARNING!
When stopping engine or leaving the operator's seat,
"LOCK" the safety lever, otherwise, a serious accident may
occur by accidental movement of travel and work levers.
Whenever leaving the operator's seat, make sure the engine
is shut down and the safety lever is "LOCKED."
Especially, when adjusting the seat, control stands, or
raising the front window, lower window, or ceiling cover,
never forget to lock the safety lever in its "LOCKED"
position.
Be careful not to move the work levers (joysticks) when

moving safety lever.
1. Push safety lever (Figure 25) down into the "LOCKED"
position. When safety lever is in the "LOCKED"
position, the front attachment, swing and travel
movement will be disabled even though a lever is Unlock
moved.
NOTE: Lower bucket (front attachment) to ground.
Place all control levers in "NEUTRAL" and shut
down engine, before using the safety lever.
2. Set safety lever (Figure 25) on "RELEASE/UNLOCK"
position, by pulling it up before starting work. lock
FG001091
NOTE: When the engine is not running, but the safety Figure 25
lever is "RELEASED" and the starter key is
tuned "ON," moving the work levers (joysticks)
may result in movement. The charged
accumulators in the system will provide pilot
pressure for control valve spool movement.
Operation OP000483
3-13
TRAVEL
WARNING!
1. Before operating the travel levers, make sure that
you know in which direction the machine is
pointing. Look at the end of the track assemblies. If
the drive motors are visible while sitting in the
operator's seat, you are looking at the back end of
the track assembly (therefore, you are looking
backwards). In this case, the response of the travel
levers will be the reverse of normal operation.
2. Before moving, make sure that there are no
personnel in the way or on the machine. Sound the
horn to alert workers that you are about to move
the machine.
3. Be sure the path is clear during travel.
4. Use extreme caution when reversing travel. Be sure
there is a clear path behind the machine.
5. Make sure to operate the travel control levers
smoothly to avoid sudden starts or stops.
6. Before leaving the operator's seat, make sure to
lock out all control systems and shut down the
engine to avoid accidental activation.
Automatic Travel Speed Control
WARNING!
Do not change the travel mode while traveling. Always use
speed mode "O" when traveling down a slope. It is very
dangerous to change to speed modes indicated "I" or "II"
while going down a slope. Only change travel mode after
coming to a complete stop.
Two travel speed ranges can be selected by using the travel

speed selector switch on the control panel (Figure 26).
O
"O" (LOW) - In this position low travel speed and a higher I
torque are selected.
II
"I" (HIGH) - In this position high travel speed and a lower
torque are selected.
"II" (AUTOMATIC) - Setting the control at the "II" position
enables the machine to change to a different speed range
automatically. This change happens automatically depending
on the hydraulic oil pressure in the travel circuit. When FG000023
hydraulic oil pressure rises, the travel speed is automatically Figure 26
set to low. An example is if the machine is traveling on a
Operation OP000483
3-14
flat, solid surface, the higher speed range would be used.
When a slope is encountered, the speed drops and the
travel circuit hydraulic pressure rises, causing the control
circuit to shift to the higher torque, lower speed range.
Operation OP000483
3-15
Travel Control Lever Operation
1. To travel straight (Figure 27), push both travel control
levers/pedals fully forward or backwards. The farther
the levers/pedals are pressed, the faster the travel
speed.
NOTE: "X" is the sprocket end of the track.
"X"
FG000303
Figure 27
2. Pivot turns (Figure 28) are made by rotating only one

track forward or backward. The machine will pivot on
the nonmoving track.
"X"
FG000304
Figure 28
3. Spin turns (Figure 29) are made by rotating one track

forward and one track backward. The machine will spin
around its center point, thus counterrotating.
"X"
FG000305
Figure 29
4. Stopping travel (Figure 30) - Returning travel levers to

"NEUTRAL" position will automatically apply brakes and
stop excavator.
"X"
FG000306
Figure 30
Operation OP000483
3-16
General Travel Instructions
1. Set engine speed control dial (Figure 31) on desired
speed.
HAOB550L
Figure 31
2. Set safety lever on "UNLOCK" position, and folding the

front, raise it 40 - 50 cm (16 - 20 in) above ground.
See Figure 32.
40 ~ 50 cm
FG000123
Figure 32
3. When possible, travel on firm, level ground. Avoid

sudden movements and sharp turns.
4. When traveling on rough ground, travel at a slow
speed [1.0 - 1.5 km/h (0.62 - 0.93 MPH)]. Reduced
engine speed, to avoid shock loading the equipment.
Be careful that an excessive force is not added to
equipment by touching or climbing on rocks.
FG000423
Figure 33
Operation OP000483
3-17
5. On rough, frozen or uneven terrain, travel slowly.
WARNING!
When traveling, keep bucket from 20 - 30 cm (8 - 12 in)
above ground.
Do not travel backward on a slope.
Never turn or travel crosswise on a slope.
Choose a safe alternate route before climbing a slope.
FG006916
If excavator starts to slip or becomes unstable, lower
Figure 34
the bucket immediately into the ground, using it as a
brake.
Avoid working on slopes, because there is a danger of
overturning by becoming unbalance while swinging
and performing front attachment operations.
It is very dangerous to swing towards bottom of slope
with a loaded bucket. 2 0~
30
Cm
In unavoidable cases level the slope with fill soil,
to make the vehicle as horizontal as possible. See
Figure 34.
Do not travel on slopes more than 30° due to turnover FG006917
danger. Figure 35
6. Travel straight up or down slopes, never diagonally

across the slope. See Figure 35 and Figure 36. Extend
the arm and lower the boom to keep the bucket about
20 - 30 cm (8 - 12 in) off the ground. If the machine
starts to slide or becomes unstable, lower the bucket to
regain control. If the engine stalls, lower the bucket,
make sure that all controls are in the neutral position
and restart the engine.
Cm
NOTE: Even though engine stops on a slope, do not 30
2 0~
operate swing control. The hydraulic
accumulators may cause the unit to swing. FG006918
Figure 36
NOTE: Do not open or close operator's door on a slope.
Make sure door is latched.
7. If dirt or mud builds up in the track frame, raise each
track and rotate and clean that track.
CAUTION!
When using the boom and arm to lift any portion of the
machine, roll the bucket until the round base is against
the ground. The angle of the arm to the boom should
be at 90°.
FG000376
Figure 37
Operation OP000483
3-18
Make sure that the material buildup has been cleared.
See Figure 37 and Figure 38.
8. The excavator can travel in water that comes up to
center of upper carriage rollers. Make sure that footing
is solid so that the machine will not sink. See “Working 90 ~ 110
in Water” on page 3-30.
NOTE: If the machine is submerged to the point that
water or mud gets into the swing bearing or
center joint, stop machine operation. Remove
the machine from the submerged location to FG006919
firm, dry ground. Do not operate until proper
Figure 38
inspection and maintenance have been
completed. Refer to the Shop Manual or contact
your distributor.
Operation OP000483
3-19
OPERATING INSTRUCTIONS
Engine Speed Control

Engine speed can be manually adjusted using the engine
speed control dial, Increase engine speed by rotating the
control knob clockwise. Decrease engine speed by rotating
the control knob counterclockwise.
IMPORTANT
The engine speed control system has been set at the HAOA690L
factory and should not require adjustment as part of routine Figure 39
maintenance.
Mode Selection
More efficient work can be done by choosing a proper
power and work mode combination, suitable to type of work
and conditions. Use the mode selection according to
following guide.
Power Mode
2
1. When the starter switch is turned "ON" the power
mode is automatically defaulted to the standard setting.
2. Select a proper power mode using button (1, Figure 1
40) before starting work. 1 2
3. When the power mode button (1, Figure 40) is

pressed, a signal sounds, changing the power mode to
either "ON" or "OFF." When the power mode is turned
"ON," the LED indicator (2, Figure 40) turns "ON."
5 6 FG000114
Deactivate the power mode by pressing it a second
Figure 40
time. When the power mode is turned "OFF," the LED
indicator (2, Figure 40) turns "OFF" and the power
mode returns to the standard mode.
Mode Selection Point

• General work.
STANDARD MODE
• Minimize fuel consumption.
• Required to perform heavy work in a short period of time.
POWER MODE • Fast speed loading.
• Fast speed travel.
Operation OP000483
3-20
Work Mode
1. When the starter switch is turned "ON" the work mode
is automatically defaulted to the digging mode.
2. Select the work mode using button (3, Figure 41)
before starting work. 1 2
4
3. When the work mode button (3, Figure 41) is pressed,
a signal sounds, changing the work mode to either
"Digging Mode" or "Trenching Mode." When the 3
trenching mode is selected, the LED indicator (4,
5 6 FG000115
Figure 41) turns "ON." When the digging mode is
selected, the LED indicator (4, Figure 41) turns "OFF." Figure 41
4. When the trenching mode is selected, the control valve
is set to optimum condition for trenching work.
Mode Selection Point Feature of Control

• General excavation. General standard.
• Loading dump trucks.
DIGGING MODE
• Lifting and transport of heavy objects.
• Breaker.
• Trenching.
TRENCHING The swing is faster and stronger
• Excavating of side wall.
MODE than boom or arm.
• Required to constant swinging.
Auto Idle Mode

6
1. The system will automatically reduce engine speed to
idle speed approximately four seconds after all of the
control levers are in the neutral position. When a pilot
function is activated, engine speed is automatically 1 2 5
returned to the preselected range.
2. When the starter switch is turned "ON," the work mode
is automatically defaulted to "AUTO IDLE."
3. When the LED indicator (6, Figure 42) is turned "ON,"
5 6 FG000116
the auto idle function is activated. Deactivate the auto
idle function by again pressing the auto idle selector Figure 42
button (5, Figure 42). At this time the LED indicator will
be turned "OFF."
WARNING!
Turn "OFF' auto idle function when performing work in
close operating area, i.e., work in a narrow area and
loading / unloading on or off a trailer.
Operation OP000483
3-21
Boost Mode
1. Power boost switch is used to gain maximum digging I
O
force.
II
2. The power boost is activated while the lower button is
being pressed on top of the right-hand work lever
(joystick). The breaker / boost / shear selector switch
must be in the "O" (BOOST) position.
NOTE: The power boost mode does not affect forward
and reverse travel.
Do not use this switch for more than ten
seconds.
FG000117
Figure 43 RIGHT-HAND WORK LEVER
(JOYSTICK)
Operation OP000483
3-22
Work Levers (Joysticks) (ISO Style)
WARNING! 1 5
3 4 7 8
Check surrounding area before swinging. When operating a
lever while in auto idle, do it carefully, because the engine
2 6
speed will increase rapidly.
NOTE: When starting work, move work levers (joysticks) FG000381

slowly and check movement of swing and front Figure 44
attachment.
This equipment is manufactured using the lever configuration
described in ISO standards. Do not change valving, hoses,
etc., that would change this standard. The boom, arm and
bucket movements and swing direction of work levers
(joysticks) are as follows:
Left-hand Work Lever (Joystick) (Figure 44 and Figure

45)
4
1. Arm dump
1 3
2. Arm crowd
3. Left swing 2
4. Right swing
NOTE: The swing brake is spring applied and
hydraulically released. It is always engaged
when the work lever (joystick) is in "NEUTRAL" FG006920
or the engine is shut down. Figure 45
NOTE: The following is not a mechanical malfunction

but a proper phenomenon of the excavator.
When operating the arm, it may stop
momentarily. When the arm is operated, the
weight of the arm may cause it to move faster
than the amount of oil being supplied.
FG000120
Figure 46
Operation OP000483
3-23
Right-hand Work Lever (Joystick) (Figure 44 and Figure
47)
6
5. Boom down
6. Boom up
7. Bucket crowd 5
7
8. Bucket dump
8
NOTE: Even after stopping the engine, the front can be
lowered to the ground by operating work lever
(joystick), by setting safety lever on "UNLOCK" FG006921
position and turning starter switch "ON." Figure 47
Change Machine Control Pattern by

Select Valve (If Equipped)
1 5
WARNING! 3 4 7 8
Check surrounding area before swinging. When operating a 2 6

lever while in auto idle, do it carefully, because the engine
speed will increase rapidly.
FG000381
Figure 48
NOTE: When starting work, move work levers (joysticks)

slowly and check movement of swing and front <ISO PATTERN>
attachment. IS
The machine control pattern can easily be changed to the
O
ISO standard or to the standard backhoe loader hydraulic

system (BHL) by changing the position of the select valve (if
equipped). Use the following procedure to change the
L
BH
position of the select valve.

The select valve is located in the rear of the cabin.
1. Rotating spool to the ISO position or to the BHL <BHL PATTERN>
position. (Figure 49)
IS
O
L
BH
FG004954
Figure 49
Operation OP000483
3-24
Work Levers (Joysticks) (BHL Style)
Left-hand Work Lever (Joystick) (Figure 48 and Figure

2
50)
4
1. Boom down
2. Boom up 3
3. Left swing 1
4. Right swing
NOTE: The swing brake is spring applied and
hydraulically released. It is always engaged
when the work lever (joystick) is in "NEUTRAL" FG006938
or the engine is shut down. Figure 50
Right-hand Work Lever (Joystick) (Figure 48 and Figure

51)
5. Arm dump 5
6. Arm crowd 6
7. Bucket crowd
7
8. Bucket dump
8
NOTE: The following is not a mechanical malfunction
but a proper phenomenon of the excavator.
When operating the arm, it may stop FG006939
momentarily. When the arm is operated, the Figure 51
weight of the arm may cause it to move faster
than the amount of oil being supplied.
NOTE: Even after stopping the engine, the front can be
lowered to the ground by operating work lever
(joystick), by setting safety lever on "UNLOCK"
position and turning starter switch "ON."
FG000120
Figure 52
Operation OP000483
3-25
OPERATING PRECAUTIONS
WARNING!
Do not rest your feet on the travel pedals during normal
machine operation. Unexpected machine travel may occur
in this situation.
1. Before starting work, investigate terrain and soil

condition. Level ground and drain area if necessary.
2. Install window guards when working where there is a
possibility of falling rocks or other objects.
FG000374
Figure 53
3. Check strength of supported structures in advance

before working on them. If insufficient, reinforce it. If
any doubt exists about structural strength, refuse to
operate unit.
4. It is possible that the boom, arm or bucket may come
into contact with the upper or lower structure of the
machine. There are digging conditions which could
allow this to happen.
FG000375
Figure 54
5. Do not continually "bottom out" the hydraulic cylinders.

Machine damage may occur if the cylinders are fully
extended or retracted, example: arm cylinder fully
retracted and the bucket cylinder is extended to rotate
the bucket into the ground.
FG006922
Figure 55
Operation OP000483
3-26
6. Do not use machine travel or swing when the bucket is
in the ground to provide additional breakout force. See
Figure 56.
FG006923
Figure 56
7. Do not use machine weight to provide additional

breakout force. See Figure 57.
8. When working on soft or muddy ground, make sure
that the machine is not sinking.
FG006924
Figure 57
9. When working close to the excavated edge, make sure

that the ground the machine is sitting on is solid. Keep
the travel motors (1, Figure 58) to the rear. See Figure
58.
FG006925
Figure 58
10. Do not excavate underneath the machine. See Figure

59.
FG006905
Figure 59
Operation OP000483
3-27
11. Make sure that there is adequate clearance from
overhead electrical supply lines. See Figure 60.
FG006907
Figure 60
12. If the excavation is in an underground location or in a

building, make sure that there is adequate overhead
clearance and that there is adequate ventilation. See
Figure 61.
FG006926
Figure 61
13. Do not use the bucket as a hammer or ramming

device. This is dangerous and causes damage to the
front attachment. See Figure 62.
FG006927
Figure 62
14. Do not dig with the excavator tracks raised. This can
result in structural and mechanical failures.
FG006928
Figure 63
Operation OP000483
3-28
15. Do not operate travel lever quickly when traveling in
high range.
• Avoid sudden starts.
• When traveling in one direction come to a
complete stop before reversing directions. Do not
rock excavator back and forth with levers.
• Avoid sudden stops. Return levers to neutral by
hand. Do not let them snap back to neutral on
their own.
FG000213
16. If the optional long fronts or attachments or heavy duty
front end attachments are used, the machine balance Figure 64
will be altered. Follow these additional operating
precautions.
WARNING!
Do not travel downhill with the front end attachments
raised.
Do not travel across slopes; travel straight up or down
slope.
Use extreme caution when swinging the upper frame
when positioned on a slope.
Allow extra swing stopping room. The additional
momentum generated by the longer or heavier front
end equipment will increase the amount of time
needed to stop the swing motion.
Make sure that all optional equipment has been
authorized and installed properly.
17. Do not move dirt or objects by swinging the excavator

into them. This can result in structural and mechanical
failures.
Operation OP000483
3-29
Working in Water
IMPORTANT
When working in water, do not exceed a slope of more than
15°. If the slope is over 15°, the rear part of the upper
structure will be immersed in water, resulting in radiator fan
and engine ECU damage.
FG006929
Figure 65
When working in water, do not operate in water over center

of upper roller (1, Figure 66).
If swing bearing gets wet, immediately grease it until all old
grease is purged from bearing.
If water gets into swing gear housing, drain water
immediately by removing lower inspection cover. Apply new
grease.
After working in water, purge old grease on bucket pins.
1 FG006930
Figure 66
Operation OP000483
3-30
PARKING EXCAVATOR
WARNING! 120
Park excavator on firm, level ground. Avoid parking on

slopes. If excavator must be parked on a slope, block tracks
and place bucket teeth in ground. See Figure 67.
FG006931
Figure 67
1. Park excavator on firm, level ground. Lower bucket to

ground as shown in Figure 68.
FG006932
Figure 68
2. Set engine speed control dial on "LOW IDLE."
HAOB290L
Figure 69
3. If you touch the operation lever unintentionally, it may

create a serious accident. Before leaving operator's
seat, set safety lever on "LOCK" position.
Unlock
lock
FG001091
Figure 70
Operation OP000483
3-31
TOWING PROCEDURE Cloth
WARNING!
Never use a damaged wire rope or chain. They could brake
and cause a serious accident.
Towing Wire
Always wear gloves when handling a chain or wire rope.
When towing excavator use a wire rope or chain capable of
handling the load.
Attach chain or wire rope to track frame as shown in
Figure 71
Insert protective material such as thick cloths between
Shackle
track frame and wire rope to prevent the wire rope from
being damage.
Towing Wire FG000669
IMPORTANT Figure 71
Use shackle hook on track frame to only haul objects that

weigh less than 5 metric tons (5.51 U.S. Tons). Never use it
to haul objects over 5 metric tons (5.51 U.S. Tons).
Operation OP000483
3-32
HYDRAULIC BREAKER
IMPORTANT
If a hydraulic breaker and piping is installed without
DOOSAN's authorization, it may create a serious
malfunction which will not be covered under the excavator
warranty.
Selection of Hydraulic Breaker

If a hydraulic breaker is installed, consider equipment's
stability and suitability for such modification. Also, consider
hydraulic oil pressure and quantity. When selecting a
hydraulic breaker consult with a DOOSAN distributor or
sales agency.
Hydraulic Hoses and Tubing for Breaker

1. When installing hydraulic breaker, assemble according
to drawings provided with kit.
2. If breaker is taken off excavator, be sure to plug and
cap all hoses and tubing to prevent contamination from
entering hydraulic system.
3. Plug and cap all connectors and fittings on breaker to
prevent contamination.
4. Check all hydraulic connections for signs of leaks or
loose components before starting operation.
Hydraulic Breaker Operation

NOTE: Hydraulic pressure and flow settings may need to be
changed. Refer to the Maintenance Section of this
manual for further information.
1. Make sure to read and understand the breaker user's
manual.
2. Inspect all mechanical and hydraulic connections.
Operation OP000483
3-33
3. Do not use the breaker as a hammer. See Figure 72.
Do not drop breaker from extreme heights.
The breaker is relatively heavy and drops fast. Do not
drop breaker from extreme heights or damage to upper
structure may result.
FG006933
Figure 72
4. Do not operate the breaker with the boom or arm

cylinders fully extended (bottomed out). See Figure 73.
Leave over 100 mm (4 in) of clearance between rod
end of cylinder and cylinder head. This will help
prevent damage to cylinders during breaker operation.
FG006934
Figure 73
5. Do not use the breaker if the hydraulic hoses vibrate

excessively. See Figure 74. Check the breaker's
hydraulic accumulator (1) for damage and repair as 1
required. If excavator is operated under this condition,
structural and hydraulic components can be damaged.
FG006935
Figure 74
6. Do not allow the breaker body to go into water if not

equipped for underwater operation. The breaker seal
can be damaged and allow rust, foreign material or
water to enter the hydraulic system and cause damage.
Only insert the breaker tool into water. See Figure 75.
HAOB970L
Figure 75
Operation OP000483
3-34
7. Do not any lifting or towing with a breaker. See Figure
76.
FG006936
Figure 76
8. Operate the breaker only to the front and rear of the

excavator. Do not use the breaker to either side of the
excavator. Do not swing the breaker from side to side
when operating it. See Figure 77.
WARNING!
Operating a breaker with the upper body turned 90° to
the tracks can result in tipping over the machine or
reduction in service life. HAOB990L
Figure 77
9. Do not curl the breaker tool tip into the arm or boom
when traveling or parking the excavator. See Figure 78.
FG006940
Figure 78
Operation OP000483
3-35
To activate breaker
1. Set breaker selector switch to "II" (BREAKER) position. I
O
2. Press lower button on top of right-hand work lever II
(joystick) to activate hydraulic breaker.
3. Release lower button on top of right-hand work lever
(joystick) to deactivate hydraulic breaker.
FG000117
Figure 79 RIGHT-HAND WORK LEVER
(JOYSTICK)
Relief Valve Adjustment

1. Cap pipe on arm end, using a cap capable of handling
350.0 kg/cm2 (5,000 psi) under the condition of
disconnecting hose to hydraulic breaker.
2. Adjust pump pressure using activating the breaker, and
watching the pressure displayed on the instrument
panel. Press the display selector button to show digital
pressure reading. (A separate pressure gauge is not
required.)
3. Adjust the relief valve pressure by turning the
adjustment screw of breaker relief valve. The relief
valve is installed on the left side of the upper structure
behind the boom. (Do not use the overload relief valve
FG006937
on the lower part of control valve for the breaker relief
valve.) Figure 80
WARNING!
If the relief valve pressure is adjusted while the
hydraulic breaker is connected, there is possibility
that a high-pressure spike or setting could break a
hose or pipe. Personal injury or death could result
from a hydraulic hose or pipe failure.
Operation OP000483
3-36
Hydraulic Oil and Filter Service Intervals
When using a hydraulic breaker, the viscosity breakdown
and contamination of hydraulic oil is faster because the work
condition is more severe than during normal digging work.
To prevent the hydraulic components (especially pump) from
having a shortened life cycle, replace the hydraulic oil and
main hydraulic oil return filter using the following schedule.
Attachment Operation Rate Hydraulic Oil Filter

250 Hours (First Replacement)
Bucket Work 100% 2,000 Hours
1,000 Hours (After First Replacement)
Hydraulic Breaker
100% 500 Hours 100 Hours
Work
* These service intervals only apply, when a genuine DOOSAN oil and filter are used. If any other
brands are used, the guaranteed changed interval should be reduced in half.
100
105 116 551
106 144 614

BREAKER OPTION RATE (%)
80
112 171 FILTER 692

(First Replacement)
119 214 782
60
128 275 893

HYDRAULIC OIL
137 335 1028
40
FILTER
156 412 (After First Replacement) 1196
175 500 1400

20
206 635 1658
0 500 1000 1500 2000
MACHINE OPERATING HOURS

FG000767
Figure 81
NOTE: The replacement intervals of hydraulic oil and filter

depend upon the amount of time the hydraulic
breaker is being used. These intervals should be
followed as opposed to regularly scheduled
maintenance.
Operation OP000483
3-37
ADJUSTING THE PUMP FLOW
NOTE: For further information, see “Flow Control” on
page 2-46.
1. On the instrument panel, press the flow control button
, the flow control screen (Figure 82) will be

displayed.
2. Use "UP" ( ) or "DOWN" ( ) buttons to adjust flow

rate.
3. Press "SELECT" ( ) button, to return to normal
display screen and save the flow rate setting.
02/05 [MO] 11:30 FLOW CONTROL
E F
C H C H
E/G SPEED 1700 RPM : APPLY ESC: CANCEL
<Normal Display> <Flow Control Display>

FG001090
Figure 82
Setting Flow Rate (l/min)

0 48
1 53
2 71
3 89
4 109
5 128
6 148
7 167
8 187
9 207
10 219
Operation OP000483
3-38
Shear Pedal Valve (Optional)
Activating Shear with Pedal Valve

1. Select shear with the selector switch of the right panel. 1
2. Two-way operation is possible by rocking the pedal
back and forth between positions (1 and 2, Figure 83).
When the pedal is in its center (at rest) position the
valve is in "NEUTRAL" and hydraulic oil flow is
stopped.
2
3. Before operating the attachment, be sure to check the
function controlled by the direction of the pedal
movement. FG000402
Figure 83
Activating Breaker with Pedal Valve

1. Select breaker with the selector switch of the right
panel.
5
2. Rotate knob (3, Figure 84) 120° for stopper (4, Figure
84) be fastened to (5, Figure 84).
3. In the condition that (2, Figure 84) is fastened, activate
the breaker to the direction (1, Figure 84).
3 4
FG000403
Figure 84
Adjusting the Stopper

1. Rotate knob (3, Figure 84) in the direction of the
arrow. then the pedal is activated according to the
display caused by (3, Figure 84) knob rotation.
CAUTION!
Breaker
When operating breaker or shear when using button
on a joystick, and it is not to be controlled by the Lock
pedal, be sure to keep the stopper in the "LOCK"
position in order for the pedal not to be activated. Shear
FG000434
Figure 85
Operation OP000483
3-39
Rotating Pedal Valve (Optional)
1
Attachment Rotating by Using the Pedal Valve
1. Pressing end (1, Figure 86) is used to turn clockwise.
2. Pressing end (2, Figure 86) is used to turn
counterclockwise.
2
NOTE: Before activating the pedal, be sure to check
the function of the attachment.
FG000405
Figure 86
Locking the Pedal

When rotating is not needed, the pedal can be locked by
using the prop rod (3) locking device.
Locking is completed when the top end of the prop (3) is 3
positioned into pedal hole.
FG000406
Figure 87
A. Location for "UNLOCKING."

B, Location for "LOCKING."
FG000407
Figure 88
Attachment Rotation Using the Left-hand Work Lever

(Joystick)
For a machine equipped with an attachment that rotates,
rotation is activated while one of the control buttons is being
pressed on top of the left-hand work lever (joystick).
There are three buttons on top of the left-hand work lever.
The left and right ones are for controlling rotation.
NOTE:The middle button is for the horn.
Left button is for counterclockwise rotation, and the right one
FG000035
is for clockwise rotation.
Figure 89 LEFT-HAND WORK LEVER
(JOYSTICK)
Operation OP000483
3-40
OPERATING TECHNIQUES
Lifting
IMPORTANT
There may be local or government regulations, about the
use of excavators for the lifting of heavy loads. Always
contact your local and government agencies in regards to
these regulations.
To prevent injury, do not exceed the rated load capacity of

the machine. If the machine is not on level ground, load
capacities will vary.
Short slings will prevent excessive load swing.
Use the lifting eye on the bucket that is provided to lift
objects.
Always try to maintain the lifting eye (Figure 90) straight
below the center line of the arm and bucket pin. In this
manner the weight of the load is being primarily held only
by the pin, and not by the bucket cylinder, link, and link
pins.
When a lifting eye is used, the sling/lifting device must be
fastened to the eye in a manner that will not allow it to
come loose.
The most stable position is over the corner of the machine.
For best stability, carry a load as close to the ground and HAAD3830
machine as possible. Figure 90
Lift capacity decreases as the distance from the machine
swing center line is increased.
Operation OP000483
3-41
Lifting Unknown Weight
When loads are not accurately known are to be lifted, the
person responsible for the job shall ascertain that the weight
of the load does not exceed the machine LOAD RATING FRONT LIFT
ZONE
CHART at the radius at which it is to be lifted.
It is recommended that you feel your way into any lift as a
precaution against tip-over. One method is to position the
boom at 90° over the side of the machine. Slowly lift the SIDE LIFT SIDE LIFT
load until it clears the ground. A lift over the side is the ZONE ZONE
most unstable, and as the load is swung into the front zone
of the excavator it will become more stable. DO NOT
INCREASE SWING RADIUS AFTER THE LOAD IS LIFTED.
REAR LIFT
ZONE
DANGER! HAAD3842
Figure 91
If a load is picked up from the front zone and swung into the
side zone, a tip-over could result causing a deadly or fatal
injury.
Lifting Known Weight

The load chart is the governing factor when lifting known
weights. It is recommended that you feel your way into any
lift as a precaution against tip-over. Whenever possible, lift
and swing payloads between the front idler area.
Pick and Carry

The machine has the ability to pick and carry payloads
without added labor. We recommend when traveling with a
suspended payload, you evaluate the prevailing conditions
and determine the safety precautions required in each case.
The following factors must be considered before attempting
to pick and carry a load.
Align the boom with the forward direction of machine travel.
Maintain this boom position when turning the machine. Turn
only when necessary, at the slowest speed, and at a wide
turning radius.
1. Use the shortest lifting radius distance possible.
2. Keep the load as close to the ground as conditions will
permit.
3. Provide tag lines to prevent load from pendulating.
Pendulating can cause a change in radius. A change in
radius could exceed the load chart rating or cause a
tip-over condition.
4. Govern travel speed to suit conditions.
5. Avoid sudden starts and stops.
Operation OP000483
3-42
OPERATION UNDER UNUSUAL
CONDITIONS
NOTE: See “Maintenance in Special Conditions” on
page 4-86 for other recommendations.
Operation In Extreme Cold

If machine is to be operated in extreme cold weather
temperatures, certain precautions must be taken to assure
continued normal operation. The following paragraphs detail
checks to be made to be certain the machine is capable of
operating at these temperatures.
1. Check the cooling system for correct antifreeze solution
for lowest temperature expected. Carefully inspect
cooling system and correct or report any leaks.
2. Keep batteries fully charged to prevent freezing. If
water is added to batteries, run engine at least one
hour to mix electrolyte solution.
3. Keep engine in best possible mechanical condition to
assure easy starting and good performance during
adverse weather conditions.
4. Use engine oil of the proper specifications for the
expected temperatures. Refer to the "Lubrication
Specifications" of the engine manual for details.
5. Keep fuel tank full at all times. Drain condensation
from tank before and after operation. Drain and service
fuel filter. To eliminate clogging of fuel filters due to
wax crystal formation in the fuel, be sure that the fuel
used has a cloud point specification below the lowest
expected temperature.
6. Lubricate entire machine according to "Periodic Service
Table and Chart" Section 4, in this manual or
lubrication chart on machine.
7. Start engine and allow it to reach normal operating
temperature before applying load.
A. If mud and ice collects and freezes on any of the
moving parts while machine is idle, apply heat to
thaw the frozen material before attempting to
operate machine.
B. Operate hydraulic units with care until they have
reached a temperature to enable them to operate
normally.
C. Check all machine controls and/or functions to be
sure they are operating correctly.
8. An extra outer air filter should be kept in the operator's
cabin to replace element that could become iced and
cause restricted air flow to engine.
Operation OP000483
3-43
9. If cold weather starting aid must be used, see "Engine
Starting" COLD WEATHER START portion of this manual.
10. Clean off all mud, snow and ice to prevent freezing.
Cover machine with tarpaulin if possible, keep ends of
tarpaulin from freezing to ground.
Operation in Extreme Heat

Continuous operation of the machine in high temperatures
may cause the machine to overheat. Monitor engine and
transmission temperatures and stop machine for a cooling-off
period whenever necessary.
1. Make frequent inspections and services of the fan and
radiator. Check coolant level in radiator. Check grills
and radiator fins for accumulation of dust, sand and
insects which could block the cooling passages.
A. Formation of scale and rust in cooling system
occurs more rapidly in extremely high
temperatures. Change antifreeze each year to
keep corrosion inhibitor at full strength.
B. If necessary, flush cooling system periodically to
keep passage clear. Avoid use of water with a
high alkali content which increases scale and rust
formation.
2. Check level of battery electrolyte daily. Keep electrolyte
above plates preventing damage to batteries. Use a
slightly weaker electrolyte solution in hot climates.
Dilute 1.28 specific gravity electrolyte as issued to 1.20
- 1.24 specific gravity readings at full charge. Recharge
batteries whenever they reach a 1.16 specific gravity
reading. Batteries self-discharge at a higher rate if left
standing for long periods at high temperatures. If
machine is to stand for several days, remove batteries
and store in a cool place.
WARNING!
Do not store acid type storage batteries near stacks of
tires; the acid fumes have a harmful affect on rubber.
3. Service fuel system as directed in "Engine Fuel

System" Section 5, of this manual. Check for water
content before filling fuel tank. High temperatures and
cooling off cause condensation in storage drums.
4. Lubricate as specified in "Periodic Service Chart and
Table" Section 4, in this manual or Lubrication Decal
on the machine.
5. Do not park machine in sun for long periods of time.
When practical park machine under cover to protect it
from sun, dirt and dust.
Operation OP000483
3-44
A. Cover inactive machine with tarpaulin if no suitable
shelter is available. Protect engine compartment,
transmission and hydraulics from entrance of dust.
B. In hot, damp, climates corrosive action will occur
on all parts of the machine and will be accelerated
during the rainy season. Rust and paint blisters will
appear on metal surfaces and fungus growth on
other surfaces.
C. Protect all unfinished, exposed surfaces with a
film of preservative lubricating oil. Protect cables
and terminals with ignition insulation compound.
Apply paint or suitable rust preventive to damaged
surfaces to protect them from rust and corrosion.
Operation in Dusty or Sandy Areas

Operation of the machine can cause dust in almost any
area. However, when in predominantly dusty or sandy areas,
additional precautions must be taken.
1. Keep cooling system fins and cooling areas clean. Blow
out with compressed air, if possible, as often as necessary.
WARNING!
Wear goggles when using compressed air.
2. Use care when servicing fuel system to prevent dust

and sand from entering the tank.
3. Service the air cleaner at frequent intervals, check air
restriction indicator daily and keep dust cup and dust
valve clean. Prevent dust and sand from entering
engine parts and compartments as much as possible.
4. Lubricate and perform services outlined on current
lubrication chart on machine and "Lubrication Chart and
Table" Section 4. Clean all lubrication fittings before
applying lubricant. Sand mixed with lubricant becomes
very abrasive and speeds wear on parts.
5. Protect machine from dust and sand as much as
possible. Park machine under cover or protect with
tarpaulin to keep dust and sand from damaging unit.
Operation in Rainy or Humid Conditions

Operation under rainy conditions is similar to that as in
extreme heat procedures listed previously.
1. Keep all exposed surfaces coated with preservative
lubricating oil. Pay particular attention to damaged or
unpainted surfaces. Cover all paint cracks and chip
marks as soon as possible to prevent corrosive effects.
Operation OP000483
3-45
Operation in Salt Water Areas
The corrosive effect of salt water and salt water spray is
very extensive. When operating in salt water areas, observe
the following precautions.
1. When exposed to salt water, dry machine thoroughly
and rinse with fresh water as soon as possible.
2. Keep all exposed surfaces coated with preservative
lubricating oil. Pay particular attention to damaged paint
surfaces.
3. Keep all painted surfaces in good repair.
4. Lubricate machine as prescribed on lubrication chart on
machine or "Periodic Service Table and Chart" Section
4, in this manual. Shorten lubricating intervals for parts
subject to exposure to salt water, if found necessary.
Operation at High Altitudes

Normally, operation of machine at high altitudes will be as
outlined in extreme cold. Before operating at high altitudes,
engine fuel and air mixture may have to be adjusted
according to appropriate engine manual.
1. Check engine operating temperature for evidence of
overheating. The pressure cap on radiator must make
a perfect seal to maintain coolant pressure in the
system.
Operation OP000483
3-46
OP000484
4Inspection, Maintenance
and Adjustment
PREVENTIVE MAINTENANCE
Routine maintenance and inspections are required to keep
your machine in the correct operating condition. The
following pages list the inspection intervals, the system or
component checks, and location references.
NOTE: The following pages list the service checks and their
required intervals. The service cycles may need to be
shortened depending on the working conditions.
Extremely hot or dusty conditions will require more
frequent service. Operational hours are determined
by the amount of time accumulated on the engine
hour meter on the control console in the cabin. HAOA601L
Figure 1
NOTE: Besides the normal hour meter, the multifunction

gauge can be used to keep track of the hours on CHECK
individual filters. See “Filter / Oil Info” on page 2-40.

02/05 [MO] 11:30
E F
C H C H
E/G SPEED 1700 RPM
POWER
AUTO
1 2 3 4
ESC
5 6 7 8
FG000037
Figure 2
Inspection, Maintenance and Adjustment OP000484

4-1
Product Identification Number (P. I. N.)
Location
A P.I.N. number, is stamped on the upper frame, under the
boom foot (Figure 3). It is also stamped on the product
identification plate (Figure 4) on outside of the cabin on
right.
NOTE: Please make note of these numbers and their
locations. These will be required whenever warranty
or service work is requested. Keep this number on
FG001447
file, incase the machine is stolen.
Figure 3
7-11, Hwasu-dong, Dong-gu,

Incheon, Korea
K1011647A
FG000764
Figure 4
Component Serial Numbers

There are many serial numbers on each traceable
components of the machine. For example, the engine serial
number is stamped on the rear left side of the engine block,
above the starter. Additional engine information is described
on a label (Figure 5) on the rocker cover.
Please make note of these numbers and their locations.
These will be required whenever warranty service work is
requested.
FG000664
Figure 5

4-2
Safety Precautions
1. Make sure to lock out the hydraulic controls and post a
notice (Warning Tag) that the machine is being
serviced to prevent any unauthorized operation.
2. Make sure to clean up any fluid spills, especially
around the engine.
3. Inspect all fuel lines to make sure that fittings, lines,
filters and O-rings, etc., are tight and are not showing
signs of wear or damage.
4. If the inspection or test procedure requires that the
engine be running, make sure to keep all unauthorized
personnel away from the machine, and that all industry
standard safety precautions are followed.

4-3
PRELIMINARY WORK MACHINE
SETUP FOR MAINTENANCE
When performing maintenance specified in this manual,
always park the excavator as follows.
NOTE: Certain types of maintenance may require the
machine to be positioned differently. Always return
machine to this position.
1. Park on firm, level ground.
FG006932
Figure 6
3. Set safety lever on "LOCK" position.
Unlock
lock
FG001091
Figure 7
4. Allow engine to run at low idle for a minimum of five

minutes to allow engine to cool. If this is not done,
heat surge may occur.
HAOB290L
Figure 8

4-4
5. Shut down engine by turning key to "O" (OFF) position.
Remove key from starter switch. O I
WARNING!
If engine must be run while performing
maintenance, use extreme care. Always have one
person in the cabin at all times. Never leave the
cabin with the engine running.
FG000175
Figure 9
6. Before starting maintenance work, hang up a tag, "Do

Not Touch When Performing Inspection or
Maintenance" on cabin door or work lever.
FG000401
Figure 10

4-5
TABLE OF RECOMMENDED
LUBRICANTS
NOTE: Refer to the Maintenance Intervals Table for
application points.
Ambient Temperature
Kind of
Reservoir -22 -4 14 32 50 68 86 104 122 °F
Fluid
-30 -20 -10 0 10 20 30 40 50 °C
SAE 10W-30
Engine Oil **
* SAE 10W-40
Pan Engine Oil
SAE 15W-40
Swing Drive SAE 90 and API GL5

Case
Gear Oil * SAE 80W-90 and API GL5
Final Drive
Case SAE 140 and API GL5
ISO VG 32
***
Hydraulic
Hydraulic * ISO VG 46
Oil Tank
Oil
ISO VG 68
* ASTM D975 No. 2

Diesel
Fuel Tank
Fuel
ASTM D975 No. 1
Grease
Grease * Multipurpose Lithium Grease NLGI No. 2
Fitting
Cooling Add Antifreeze

Coolant
System * (50% antifreeze - 50% distilled water)
* Installed at factory.
** Engine oil must meet ACEA-E5 or API-CI-4.
*** Hydraulic oil change interval is 2,000 hours, only when DOOSAN Genuine Oil is used. If other
brands of oil is used, guaranteed change interval is 1,000 hours.
API: American Petroleum Institute.

4-6
ACEA: Association des Constructeurs Europens d’Automobiles.
ASTM: American Society of Testing and Material.
ISO: International Standardization Organization.
NLGI: National Lubricating Grease Institute.
SAE: Society of Automotive Engineers.
IMPORTANT
Do not mix oils from different manufacturers. DOOSAN
does not endorse specific brands but does suggest that
owners select quality oils whose suppliers provide
assurance that required standards will always be met or
exceeded.
Fluctuating daily or weekly extremes of temperature, or
operation in subzero freezing weather may make it
impractical to use straight weight lubricants. Use good
judgement in selecting lubricant types that are
appropriate for climate conditions.

4-7
FLUID CAPACITIES
Component Capacity
Engine Oil Pan with Filter 27 liters
(7.1 U.S. gal.)
Cooling System 24 liters
(6.3 U.S. gal.)
Fuel Tank 410 liters
(108 U.S. gal.)
Hydraulic Oil Tank Level 150 liters
(40 U.S. gal.)
System 240 liters
(63 U.S. gal.)
Travel Reduction Device (Each) 3.3 liters
(0.87 U.S. gal.)
Swing Device 7.3 liters
(1.93 U.S. gal.)
LUBRICATION AND SERVICE

CHART
Lubrication and service chart is on the inside of battery box
cover. The symbols shown here are used in the lubrication
and service chart on the next page.
Symbol Description Symbol Description
Lubrication Coolant
Gear Oil (Swing Device, Travel Device) Air Cleaner Element
Engine Oil Fuel Filter
Engine Oil Filter Air Conditioner Filter
Hydraulic Oil Drain Water
Hydraulic Oil Return Filter

4-8
4-9
Description of Lubrication and Service Chart
12 13 9 19 20
18
14 5
3
4
6
10
15
2
16
2
17 10h
50h
250h
500h
1000h
2000h
8 11 7 1
FG008488
Figure 11

4-10
SERVICE DATA
DX255LC
No. Items to Check Service Qty. Service Interval
10 50 250 500 1000 2000
1 Front Joint Pin (1) Grease 6 F100 W10
2 Front Joint Pin (2) Grease 11 F100 W10
3 Swing Bearing Grease 3 W10
4 Swing Gear Grease 1
Swing Reduction
5 Grease 1 W10
Gear
Gear Oil
6 Swing Device 5 L V F
(80W90)
7 Track Spring Grease 2 W10
Travel Reduction Gear Oil
8 2X3.3 L F, V
Device (80W90)
Engine Oil
9 Engine Oil 27 L V F
(10W40)
10 Hydraulic Oil Tank Hydraulic Oil 240 L V
11 Fuel Tank Diesel 410 L V
12 Fuel Prefilter Cartridge 1 V
Coolant
13 Radiator 30 L V PG
(Antifreeze)
Hydraulic Oil
14 Element 1 F
Return Filter
15 Pilot Filter Element 1 F
Hydraulic Oil
16 Strainer 1 C
Suction Strainer
17 Engine Oil Filter Cartridge 1 F
18 Fuel Filter Cartridge 1
Air Cleaner
Element 1 C
(Outer)
19
Air Cleaner
Element 1
(Inner)
Air Conditioner
Cartridge 1 C
Filter (Outer)
20
Air Conditioner
Cartridge 1 C
Filter (Inner)
V: Maintenance and Refill.
C: Cleaning.
F: First Time Exchange Only.
F100: Every 10 Hours For First 100 Hours.
W10: Every 10 Hours If Operating In Water.
PG: Propylene Glycol - Extended Life Antifreeze (Drain and replace using this interval.) See
“Engine Cooling System” on page 4-75, for further explanation.
: Replacement On Every Interval.
NOTE: For additional service items see list of “Maintenance Intervals” on page 4-12.

4-11
MAINTENANCE INTERVALS
SERVICE ITEM PAGE
10 Hour / Daily Service
Grease Boom, Arm and Front Attachment Pins (for first 100 hours) 4-14
Check Engine Oil Level 4-14
Check Level of Hydraulic Oil Tank 4-15
Check for Leaks in Hydraulic System 4-16
Check Fuel Level 4-16
Check for Leaks in Fuel System 4-17
Check Fuel Prefilter and Drain Water As Required 4-18
Check Oil Level of Swing Reduction Device 4-19
Clean Dust Net in Front of Oil Cooler and Intercooler 4-20
Check Cooling System and Refill As Required 4-20
Check Level of Window Washer Liquid 4-21
Inspect the Bucket Teeth and Side Cutters for Signs of Wear 4-21
Inspect Cooling Fan Blade 4-22
Check Air Intake System 4-22
Inspect Seat Belt for Proper Operation 4-22
Inspect the Structure for Cracks and Faulty Welds 4-23
Check the Operation of All Switches 4-23
Check the Operation of All Exterior Lights, Horn and Control Console Indicator and 4-23
Monitor Lights
Start Engine, Check Starting Ability, and Observe Exhaust Color at Start-up and at 4-23
Normal Operating Temperature. Listen for Any Abnormal Sounds
Check Operation of All Controls 4-24
50 Hour / Weekly Service
Perform All Daily Service Checks 4-25
Grease Arm and Front Attachment Pins 4-25
Grease Swing Bearing 4-26
Drain Water and Sediment from Fuel Tank 4-27
Check Engine Fan Belt for Cracks, Wear and Correct Tension (After First 50 Hours) 4-27
Change Engine Oil and Filter (After First 50 Hours) 4-27
Inspect the Track Assemblies for Proper Tension and Loose, Worn or Damaged Parts 4-27
(Links, Shoes, Rollers, Idlers)
250 Hour / Monthly Service
Perform All Daily and 50 Hour Service Checks 4-28
Change Swing Reduction Device Oil (Drain and Refill After First 250 Hours) 4-28
Grease Arm and Front Attachment Pins 4-29
Check Engine Fan Belt Tension 4-31
Check Engine Fan Belt Wear 4-31
Check Oil Level in Travel Reduction Device (One on Each Side of Unit) 4-32
Change Breaker Filter Element (Optional) 4-33
Change Oil in Travel Reduction Device (One on Each Side of Unit) (After First 250 Hours) 4-33
Change Hydraulic Oil Return Filter (After First 250 Hours) 4-33
Change Pilot Filter (After First 250 Hours) 4-33

4-12
SERVICE ITEM PAGE
Inspect Pins and Bushings of the Front End Attachments for Signs of Wear 4-34
Check Fluid Levels in Batteries and Battery Charge Levels 4-34
Inspect for Any Loose or Missing Nuts and Bolts 4-34
Inspect Fuel System Hose Clamps 4-34
500 Hour / 3 Month Service
Perform All Daily, 50 and 250 Hour Service Checks 4-35
Grease Swing Gear and Pinion 4-35
Change Engine Oil and Filter 4-36
Clean Air-Conditioning Outer Filter 4-37
Check and Clean Air-Conditioning Inner Filter 4-38
Clean Radiator, Oil Cooler, Intercooler, Fuel Cooler and Air Conditioner Condenser Core 4-39
Clean Outer Filter of Air Cleaner 4-40
Change of Fuel Prefilter 4-41
Change Fuel Filter 4-42
1,000 Hour / 6 Month service
Perform All Daily, 50, 250 and 500 Hour Service Checks 4-44
Grease Swing Reduction Device 4-44
Change Hydraulic Oil Return Filter 4-45
Change Pilot Filter 4-46
Change Oil in Travel Reduction Device (One on Each Side of Unit) 4-47
Change Air-Conditioning Outer Filter 4-48
Check Air Conditioner Refrigerant 4-49
Check and Adjust Engine ** 4-50
2,000 Hour / Yearly Service
Perform All Daily, 50, 250, 500 and 1,000 Hour Service Checks 4-51
Change Swing Reduction Device Oil 4-51
Change Outer and Inner Air Cleaner Elements 4-52
Change Radiator Coolant 4-53
Hydraulic Oil Exchange and Suction Strainer Cleaning 4-54
Check Alternator and Starter** 4-56
Check All Rubber Antivibration Shock Mounts 4-56
Perform and Record the Results of the Cycle Time Tests 4-56
Inspect Machine to Check for Cracked or Broken Welds or other Structural Damage 4-56
Check, Adjust Valve Clearance ** 4-56
Check Head Bolt Torques 4-56
4,000 Hour / Biennial Service
Major Parts - Periodic Replacement 4-57
12,000 HOUR / SIX YEAR SERVICE
Hose In-service Lifetime Limit (European Standard ISO 8331 and EN982 CEN) 4-58
** These checks need to be completed by an authorized DOOSAN dealer.

4-13
10 HOUR / DAILY SERVICE
Grease Boom, Arm and Front Attachment

Pins (for first 100 hours)
WARNING!
Do not remove the grease fitting until the pressure is
entirely bleed off by loosening grease fitting slowly to
avoid fatal wound.
FG000500
Let anybody never be in the blowing direction.
Figure 12
Be careful to any kinds of works for nipples and
hydraulic line plugs.
Grease every 10 hours for first 100 hours and every 50 or

250 hours thereafter (See page 4-25).
NOTE: If the unit has been running or working in water the
front attachment should be greased on a 10 hour /
daily basis.
Check Engine Oil Level

2
1
WARNING!
Allow the engine to cool before checking the oil level to
avoid burns by touching hot engine parts.
NOTE: When checking level using a dipstick always remove

and wipe it clean before making final level check.
1. Shut down engine and wait for fifteen minutes. This will
allow all oil to drain back to oil pan.
FG007006
2. Remove dipstick (1, Figure 13) and wipe the oil off Figure 13
with a clean cloth.
3. Insert dipstick fully in the oil gauge tube, then take it
out again.

4-14
4. Engine oil level must be between "HIGH" and "LOW"
marks on dipstick. H
NOTE: If oil is above "HIGH" mark on dipstick, some

must be drained to return oil to proper level. L
5. Add oil through engine oil fill cap (2, Figure 13), if the
oil level is below the "LOW" mark.
FG000616
Figure 14
Check Level of Hydraulic Oil Tank
WARNING!
The hydraulic oil will be hot after normal machine
operation. Allow the system to cool before attempting to
service any of the hydraulic components.
The hydraulic tank is pressurized. Turn the breather cap
slowly to allow the pressurized air to vent. After the ARO1760L
pressure has been released, it is safe to remove either Figure 15
the fill cap or service covers.
1. Position the machine on firm, level ground. Lower

boom and position bucket on ground as shown in
Figure 16.
2. Set engine speed to "LOW IDLE."
FG006941
Figure 16
3. Set safety lever to "LOCK" position.

4. Check level gauge by opening right access door. Oil
level must be between marks on sight gauge.
H
L
FG000118
Figure 17

4-15
5. If the level is below "L" mark add oil.
A. Shut down engine.
B. The hydraulic tank is pressurized. Turn the
breather cap slowly to allow the pressurized air to
vent.
C. Remove the upper cover of the hydraulic tank and
add oil.
IMPORTANT FG006942
Figure 18
Do not fill above "H" mark on sight gauge.
Overfilling can result in damage to equipment and
oil leaking from hydraulic tank due to expansion.
6. If oil level is above the "H" mark drain oil.

A. Shut down engine and wait for the hydraulic oil to
cool down.
B. Drain the excess oil from drain valve (Figure 19)
at the bottom of the tank into a suitable container,
using a hose connected to the valve.
NOTE: Dispose of drained fluids according to local
regulations.
FG006943
Figure 19
Check for Leaks in Hydraulic System

1. Perform a daily walk-around inspection to make sure
that the hoses, piping, fittings, cylinders and hydraulic
motors are not showing any signs of leakage. If any is
noted, determine the source of the leak and repair.
Check Fuel Level 1
WARNING!
Use extreme safety precautions while refueling to
prevent explosions or fire.
2
Immediately clean up any split fuel.
FG000130
1. At end of each work day, fill fuel tank. Add fuel
through fuel fill tube (1, Figure 20). When working at a Figure 20
temperature of 0°C (32°F) or higher, use ASTM No.
2-D or its equivalent. At temperatures below 0°C (32°F)
use ASTM No. 1-D or its equivalent.

4-16
2. Make sure that the fuel fill hose is grounded to the
excavator before fueling begins.
3. Check the amount of fuel in the tank by observing the
fuel tank sight gauge (2, Figure 20).
NOTE: See “Fluid Capacities” on page 4-8. for
capacity.
4. The excavator may be equipped with the optional
battery operated fuel fill pump. The pump assembly is
in the hydraulic pump compartment. Put the suction
hose of the pump into the fuel resupply tank. Turn the
switch in the pump compartment "ON," and the fuel will
be pumped into the excavator fuel tank.
NOTE: See “Fuel Transfer Pump (Option)” on
page 4-77, for further information.
5. Do not overfill the tank.
6. Securely tighten cap after fueling.
NOTE: If breather holes (3, Figure 21) in cap are
clogged, a vacuum may form in the tank
preventing proper fuel flow to engine. Keep 3
holes in fuel cap clean.
FG000317
Figure 21
Check for Leaks in Fuel System

1. Perform an inspection of the engine compartment to
verify that the fuel system is not leaking. If any is
noted, determine the source of the leak and repair.

4-17
Check Fuel Prefilter and Drain Water As
Required
1. A fuel prefilter is inside the left rear side access door.
2. Open the access door on left rear side of the machine.
FG006944
Figure 22
3. It is necessary to drain the collected water if the bowl

is full of water or sediment.
4. Position a small container under fuel prefilter. Drain
water or sediment by opening drain valve (2, Figure
23) on bottom of bowl (1).
1
regulations. 2
5. Close drain valve.

open close
FG000438
Figure 23

4-18
Check Oil Level of Swing Reduction
Device
WARNING!
The gear oil is very hot after the machine has been
operating. Shut all systems down and allow them to
cool. Before fully removing any motor case inspection
port plug, etc., loosen the plug slightly to allow
pressurized air to escape.
NOTE:When checking level using a dipstick always remove

and wipe it clean before making final level check.
1. Remove dipstick (1, Figure 24) and wipe the oil from
the dipstick with a cloth. 2
2. Insert dipstick (1, Figure 24) fully into dipstick tube.
FG006969
Figure 24
3. When dipstick is pulled out, oil level must be between

"HIGH" and "LOW" marks on dipstick.
NOTE: If oil is above "HIGH" mark on dipstick, some H
must be drained to proper level.
4. If the oil does not reach the "L" mark on the dipstick, L
add oil through fill port (2, Figure 24).
FG000419
Figure 25
5. If the oil level exceeds the "H" mark on the dipstick,

open cap (3, Figure 26) of drain valve and connect
hose (4) to the valve. Drain the excessive oil into a
suitable container.
NOTE: Dispose of drained fluids according to local 3
regulations.
FG006945
Figure 26

4-19
Clean Dust Net in Front of Oil Cooler
and Intercooler
IMPORTANT
If running excavator in dusty area, check dust net
everyday and clean it if dirty.
FG006946
Figure 27
WARNING!
If using compressed air or water to clean the dust net,
make sure that proper eye protection is worn.
1. Loosen the wing bolt(s) and remove dust net.

2. Clean with compressed air or water.
Check Cooling System and Refill As

Required
WARNING!
Allow the engine to cool before releasing the radiator
cap. Make sure to loosen the cap slowly to release any
remaining pressure.
Radiator cleaning is performed while the engine is running.
Take extreme caution when working on or near a running
engine. Make sure to lock out and tag the controls
notifying personnel that service work is being performed.
Do not remove the radiator cap unless it is required.
Observe the coolant level in the coolant recovery tank.
NOTE: Do not mix ethylene glycol and propylene glycol

antifreeze together. If the two are mixed, the protection
level will be reduced to the level of the ethylene glycol.

4-20
1. When the engine is cold, remove the radiator cap and
check the coolant level inside the radiator. Do not rely
on the level of coolant in the coolant recovery tank.
Refill radiator as required. Refer to coolant
concentration table. (See page 4-76)
2. Check to make sure that the coolant transfer line from
the coolant recovery tank to the radiator is free and
clear of obstructions, or not pinched.
3. Observe the level of coolant in the coolant recovery
tank. The normal cold engine fluid level should be FG006947
between "FULL" and "LOW" marks on tank.
Figure 28
4. If the coolant is below the "LOW" mark, add coolant to
this tank.
Check Level of Window Washer Liquid

1. Open left front access door and check fluid level in
windshield washer tank.
2. Open fill cap and add fluid.
NOTE: Use a washer liquid that is rated for all seasons.
This will prevent freezing during cold weather
operation.
FG008040
Figure 29
Inspect the Bucket Teeth and Side

Cutters for Signs of Wear
1. On a daily basis, inspect the bucket teeth to make
sure that tooth wear or breakage has not developed.
2. Do not allow the replaceable bucket teeth to wear
down to the point that the bucket adapter is exposed.
See Figure 30.
NOTE: These instructions are only for DOOSAN OEM
buckets. If you are using other manufacturers'
buckets, refer to their specific instructions. Figure 30 1. POINT, 2. ADAPTER and
3. PIN

4-21
Inspect Cooling Fan Blade
WARNING!
Personal injury can result from a fan blade failure.
Never pull or pry on the fan. This can damage the fan
blade(s) and cause fan failure.
1. An inspection of the cooling fan is required daily.

Check for cracks, loose bolts, bent or loose blades,
Figure 31
and for contact between the blade tips and the fan
shroud. Check the fan to make sure it is securely
mounted. Tighten the bolts if necessary. Replace any
fan that is damage.
Check Air Intake System
CAUTION!
Hot engine components can cause burns.
Avoid contact with hot engine components
1. Park the machine on a level surface, lower the

attachment to the ground, set safety lever to "LOCK" HAOA050L
position, and shut down engine. Figure 32
2. Check the engine intake hose, and hose bands for

damage and tightness.
3. If damaged, wrinkled, or loose, replace or retighten or
contact your nearest DOOSAN dealer.
IMPORTANT
Severe engine damage will result from running with
unfiltered air.
Do not operate engine if any leaks or defects are FG000421
found on air intake system. Figure 33
Inspect Seat Belt for Proper Operation

4-22
Inspect the Structure for Cracks and
Faulty Welds
1. During the daily walk-around inspection and when
greasing the machine, look for any visible damage to
the machine. Repair or replace any damaged parts
before operating the machine.
Check the Operation of All Switches

1. Verify the working condition of all switches before
starting the engine.
Check the Operation of All Exterior

Lights, Horn and Control Console
Indicator and Monitor Lights
1. Turn engine starter switch to the "I" (ON) position and
observe all of the indicator lights.
2. Restore operation of any light bulbs that do not turn
"ON" at this time.
3. Sound the horn. Repair or replace if required.
4. Turn "ON" and inspect all exterior work lights. Replace
any monitors, burned out bulbs or cracked or broken
housings or lenses.
Start Engine, Check Starting Ability, and

Observe Exhaust Color at Start-up
and at Normal Operating
Temperature. Listen for Any
Abnormal Sounds

4-23
Check Operation of All Controls
IMPORTANT
Cold weather operation requires that the operator fully
warm up the hydraulic oil before beginning machine
operation. Follow all warm up instructions listed in the
Operating Instruction section of this manual. Make sure
to cycle oil through all of the components, including all
cylinders, both travel motors and the swing motor. Cold
hydraulic oil in the lines and components needs to be
warmed before beginning full operation. If this is not
done, damage to the cylinders or hydraulic motors can
occur.
1. With the engine at rated speed, operate all of the

controls.
2. Follow cold weather hydraulic system warm-up
procedures.
3. Note any slow operations or unusual movements.
Determine the cause and repair the fault before
operating.

4-24
50 HOUR / WEEKLY SERVICE
Perform All Daily Service Checks
Grease Arm and Front Attachment Pins

Grease every 10 hours for first 100 hours and every 50
hours thereafter.
daily basis.
• Position machine as shown below and lower the
front attachment to the ground and shut down
engine
• Press the grease fitting and inject grease with the
grease gun on the marked point
• After injection, clean off the old grease that has
been purged.
D B,E C A
FG006949
Figure 34
Reference Reference
Number Number
A Arm Link Joint Pin (1 Points) D Bucket Link Joint Pin (1 Point)
B Link Joint Pin (2 Points) E Bucket Cylinder Rod Pin (1 Point)
C Arm Bucket Joint Pin (1 Points)

4-25
A. Arm link joint pin (1 point)
B. Link joint pin (2 points) B B
C. Arm bucket joint pin (1 point)

D. Bucket link joint pin (1 point)
D
A
FG001438
Figure 35
E. Bucket cylinder rod pin (1 point)
FG001439
Figure 36
Grease Swing Bearing

1. Position the machine on firm, level ground. Lower the
front attachment to the ground and shut down engine.
2. There are three grease fittings for the swing bearing.
Do not over lubricate. Purge old grease with new.
Remove all purged grease.
FG006950
Figure 37

4-26
Drain Water and Sediment from Fuel Tank
1. Perform this procedure before operating the machine.
2. Drain water and sediment from bottom of fuel tank into
a suitable container.
NOTE: Dispose of drained fluid according to local
regulations.
NOTE: Always completely fill fuel tank at end of each
workday to prevent condensation from forming
on the inside walls of the tank. FG000296
Figure 38
Check Engine Fan Belt for Cracks, Wear

and Correct Tension (After First 50
Hours)
1. Inspect after first 50 hours of operation and every 250
hours thereafter. For details, See “Check Engine Fan
Belt Tension” on page 4-31.
Change Engine Oil and Filter (After First

50 Hours)
1. Change engine oil and filter after first 50 hours of
operation or rebuild, then every 500 thereafter. For
details, See “Change Engine Oil and Filter” on
page 4-36.
Inspect the Track Assemblies for Proper

Tension and Loose, Worn or Damaged
Parts (Links, Shoes, Rollers, Idlers)
1. Do a daily walk-around inspection of all components
including the track assemblies. Look for missing,
damaged or excessively worn parts. See “Track
Tension” on page 4-81.
2. Jack up each track and perform the two speed travel
motor test.

4-27
250 HOUR / MONTHLY
SERVICE
Perform All Daily and 50 Hour Service

Checks
Change Swing Reduction Device Oil

(Drain and Refill After First 250
Hours)
NOTE: Change swing reduction device oil after first 250
hours on a new machine and every 2,000 hours
thereafter (See page 4-51).

4-28
Grease Arm and Front Attachment Pins
Grease every 10 hours for first 100 hours and every 250
hours thereafter.
daily basis.
• Position machine as shown below and lower the
front attachment to the ground and shut down
engine
• Press the grease fitting and inject grease with the
grease gun on the marked point
• After injection, clean off the old grease that has
been purged.
B,C,D
A G FG006951
Figure 39
Reference Reference
Number Number
A Boom Cylinder Head Pin D Arm Cylinder Head Pin (1 Point)
(2 Points) E Boom Arm Joint Pin (2 Points)
B Boom Foot Pin (2 Points) F Arm Cylinder Rod Pin (1 Point)
C Boom Cylinder Rod Pin G Bucket Cylinder Head Pin
(2 Points) (1 Point)

4-29
A. Boom cylinder head pin (2 points)
A A
FG006952
Figure 40
B. Boom foot pin (2 points)

C
C. Boom cylinder rod pin (2 points)
D
D. Arm cylinder head pin (1 point)
C
B
FG006953
Figure 41
E. Boom arm joint pin (2 points)

F. Arm cylinder rod pin (1 point) E
G. Bucket cylinder head pin (1 point) E
FG006954
Figure 42

4-30
Check Engine Fan Belt Tension FAN
10mm/10kg
IMPORTANT COMPRESSOR
A loose fan belt can cause engine overheating, poor ALTERNATOR

charging, and/or premature belt wear. A belt that is too
tight can cause damage to the water pump, alternator
bearing or belt.
CRANKSHAFT FG000353
1. Inspect every 250 hours. (Inspect after first 50 hours of Figure 43
operation.)
2. With the engine shut off, check the tension of the fan
belt by pressing downwards on the belt, midway
between the fan pulley and alternator pulley. The belt
should flex approximately 10 mm (0.4 in). See Figure
43. To adjust the belt, loosen the alternator adjustment
plate bolts, adjust the belt tension and retighten the
bolts.
Check Engine Fan Belt Wear
WARNING!
Keep clear of engine fan and fan drive belts when the
engine is running. Rotating fan and belt contact can
cause injury.
WARNING! Figure 44
When checking, adjusting or replacing drive belts, care

must be taken to prevent accidental cranking of the
engine. Be sure the starter switch is in the "OFF"
position and the controls are tagged.
1. Replace badly worn, greasy or severely cracked belts

immediately. These conditions prevent proper belt
function. Visually inspect the belt. Check the belt for
intersecting cracks. Transverse (across the belt width)
cracks are acceptable. Longitudinal (direction of belt
length) cracks that intersect with transverse cracks are
not acceptable. Replace the belt if it is frayed or has
pieces of material missing.
2. Before installing new belts, make sure all pulley
grooves are clean and not worn. Replace pulley, if
damaged, or if the grooves are worn.
3. All pulley support bearings, shafts, and brackets must
be in working order.

4-31
4. When replacing belts and pulleys, pulley alignment
must be checked with belts tensioned and brackets
securely clamped. A misalignment that can be detected
by the naked eye is detrimental to belt performance.
5. Do not force the belts into the pulley grooves by prying
with a screwdriver or pry bar. This will damage the belt
side cords which will cause the belts to turn and result
in complete destruction of the belts in operation.
6. Belts on new machines and replacement belts lose
their tension as they seat into the pulley grooves.
Check the tension of new belts at 50 hour intervals
until tension is stabilized and thereafter, every 250
hours. If the tension falls below the required minimum,
the belt slips damaging the belts and pulley grooves.
NOTE: When operating in abrasive conditions, check
tension every 100 hours.
Check Oil Level in Travel Reduction

Device (One on Each Side of Unit) 3
WARNING! 1
operating. Shut all systems down and allow them to 2
cool. Before fully removing any motor case inspection
port plug, etc., loosen the plug slightly to allow FG006955
pressurized air to escape. Figure 45
1. Make sure that the machine is on firm, level ground.

2. Rotate the track until ports (1 thru 3, Figure 45) are in
their proper positions as shown.
3. Loosen fill plug (3, Figure 45) slightly to allow
pressurized air to escape.
4. Remove oil level plug (1, Figure 45).
5. Check oil level. The oil should be near the bottom of
the level plug opening.
6. Add oil through the fill plug (3, Figure 45) opening, if
necessary.
7. Clean and install oil level and fill plugs (1 and 3,
Figure 45).
8. Repeat this procedure on the other travel reduction
device.

4-32
Change Breaker Filter Element (Optional)
WARNING!
The hydraulic oil will be hot after normal machine operation.
Allow the system to cool down before changing pilot filter.

front attachment to the ground and shut down engine. FG006956
Figure 46
2. Loosen the hydraulic oil tank breather cap to release
pressure.
3. Locate breaker filter assembly (Figure 46).
4. Position a container under the filter assembly. Remove
the drain plug and completely drain the assembly.
5. Using a 30 mm spanner, unscrew filter housing from
filter bottom.
6. Remove O-ring from filter head.
7. Replace filter.
8. Apply a small amount of oil around the entire O-ring
and install the filter housing on the filter head.
NOTE: Tightening torque : 27 kg•m (265 Nm, 195 ft lb)
9. Install drain plug in bottom of filter housing.
10. After changing breaker filter, vent air from pump and
check level of hydraulic oil tank.
Change Oil in Travel Reduction Device

(One on Each Side of Unit) (After
First 250 Hours)
NOTE: Drain and refill oil after first 250 hours of operation or
rebuild, and every 1,000 hours thereafter (See page
4-47).
Change Hydraulic Oil Return Filter (After

First 250 Hours)
NOTE: Change hydraulic oil return filter after first 250 hours
of operation or rebuild, then every 1,000 hours
thereafter (See page 4-45).
Change Pilot Filter (After First 250 Hours)

NOTE: Change pilot filter after first 250 hours and every
1,000 hours thereafter (See page 4-46).

4-33
Inspect Pins and Bushings of the Front
End Attachments for Signs of Wear
Check Fluid Levels in Batteries and

Battery Charge Levels
Inspect for Any Loose or Missing Nuts

and Bolts
Inspect Fuel System Hose Clamps

4-34
500 HOUR / 3 MONTH SERVICE
Perform All Daily, 50 and 250 Hour

Service Checks
Grease Swing Gear and Pinion
WARNING!
Greasing swing gear and pinion must be serviced by
only one person.
1. Remove inspection cover and inspect the condition of

the grease. Make sure that water or other contaminants
are not noticeable.
NOTE: The upper structure must be rotated a little at a
time so that the entire face of the swing gear
can be lubricated. Use extreme caution when
performing this operation.
FG006957
Figure 47
2. If water or other contaminations are found, remove the

lower access cover so that the gear teeth can be
thoroughly cleaned and lubricated.
3. Install access covers after lubricating gear teeth.
FG000148
Figure 48

4-35
Change Engine Oil and Filter
NOTE: Change engine oil and filter after first 50 hours of
operation or rebuild, then every 500 thereafter.
WARNING!
DO NOT change oil on a hot engine. Allow the engine
to cool down before attempting to change the engine oil
and filter to avoid burns by touching hot engine parts.
1. Position a larger container under the engine. Remove

cap (1, Figure 49) and install hose (2) to drain the
engine oil. Remove hose (2) and install cap (1).
regulations.
1
FG000144
Figure 49
2. Replace engine oil filter by using filter wrench. The

engine oil filter is a spin-on type. See Figure 50.
Remove and discard filter.
3. Install new filter. Apply a small amount of oil around
filter gasket. Screw filter on head until gasket contacts
head, turn filter 1/2 turn more.
FG006958
Figure 50
4. Refill the engine with the correct oil through the oil fill
port (Figure 51). Refer to the Lubrication Table of this
manual for the recommended oil for the operating
conditions.
capacity.
5. Start engine. Run engine for five minutes at "LOW
IDLE," and check engine oil pressure light.
6. Shut down engine. Look for signs of leaks at filter.
Recheck oil level after fifteen minutes. FG006314
Figure 51

4-36
Clean Air-Conditioning Outer Filter
The unit is equipped with an air filtration system which filters
out dirt and dust particles from air being circulated into
operator's cabin. This filter should be cleaned out.
NOTE: In the event that the unit is being operated in a dusty
environment, the cleaning and replacement should
be performed more frequently. If filter is damaged,
replace damaged filter with a new one.
WARNING!
All service and inspection of air-conditioning system
should be performed with the starter switch in the "O"
(OFF) position.
WARNING!
If using compressed air to clean the element, make sure
that proper eye protection is worn.
NOTE: All right and left call outs are based on the operator
being seated in the operator's seat facing the front.
1. Open the door in the left front of the machine, then
remove the cover (1, Figure 52) by loosening the four
wing bolts.
1
TOP
Donaldson.
FG000440
Figure 52
2. Open the cover by turning the knob (1, Figure 53) in

the rear of the cabin.
FG000441
Figure 53

4-37
3. Remove filter (Figure 54) and inspect for any damage.
4. Use compressed air to clean filter. If filter is still dirty,
then change to new one.
5. Reassemble in reverse order.
FG000342
Figure 54
Check and Clean Air-Conditioning Inner

Filter
WARNING!
(OFF) position.
WARNING!
FG000422
If using compressed air to clean the element, make sure Figure 55
that proper eye protection is worn.
1. Remove the filter by pulling out ward the knob while

pressing the upper part and lower part of the filter
handle which is inside of the left rear part of the cabin.
2. Use compressed air in the clean filter. If the filter is
damaged replaced by a new one.
If the filter is very dirty use a mild soap or detergent
and water to clean it.
IMPORTANT
If water was used to clean filter, be certain it is
completely dry before installing.

4-38
Clean Radiator, Oil Cooler, Intercooler,
Fuel Cooler and Air Conditioner
Condenser Core
WARNING!
If compressed air, steam or water hit your body directly,
there is danger of injury. Always wear protective
FG006960
glasses, mask and safety shoes during the cleaning
precess. Make sure that all extra personnel are clear of Figure 56
the work area.
1. Open the rear left door and engine cover.

2. Loosen the wing bolt(s) and remove dust net from in
front of oil cooler and intercooler.
3. Clean the outside of the radiator and oil cooler,
intercooler and fuel cooler with compressed air, steam
or water. Wash from the outside of the engine
compartment inwards. Repeat the cleaning process
from the inside of the engine compartment outwards to
remove all dirt and debris.
NOTE: Clean dust net and install it after cleaning FG006946
radiator, oil cooler, intercooler and fuel cooler. Figure 57
4. Clean air conditioner condenser core with compressed

air, steam or water.
IMPORTANT
To prevent damage to the cores, apply compressed
air from an appropriated distance. Damaged core
may cause water leakage or overheating. In a dusty
site, check the core daily, irrespective of the
maintenance interval. FG006960
Figure 58

4-39
Clean Outer Filter of Air Cleaner
02/05 [MO] 11:30
NOTE: Clean outer filter every 500 hours / 3 months of
service.
NOTE: If air cleaner clogged warning light (Figure 59)
on instrument panel comes "ON" the air cleaner E F
must be serviced.
C H C H
NOTE: When working in severely dusty conditions, the
service interval should be shortened. E/G SPEED 1700 RPM
FG000264
Figure 59
WARNING!
Never clean or attempt to remove the air cleaner filter if the
engine is running.
If using compressed air to clean the filter, make sure that
proper eye protection is worn.
1. Locate the air cleaner assembly.

NOTE: When it reaches every 500 hours or If indicator
light (Figure 59) on instrument panel comes
"ON" the air cleaner must be serviced. 2
NOTE: Change outer filter after cleaning 5 times or
every 2,000 hours / 1 year of service.
2. Remove and clean rubber evacuator valve (1, Figure 60)
from bottom of air cleaner housing cover (2). Inspect seal 1
lips for wear or damage. Replace valve if necessary.
FG000297
NOTE: Install evacuator valve with lips parallel to the Figure 60
cover.
3. Remove the access cover (2, Figure 61) by loosening the

latches (3).
4. Remove the outer filter (4, Figure 61) from the housing. Do 5
not remove inner filter (5).
4
3
1 FG000702
Figure 61

4-40
5. Clean the outer filter (4, Figure 61) by blowing
compressed air from the inside of the filter towards the
outside. Do not use more than 205 kPa (30 psi) air
pressure.
HAOC570L
Figure 62
6. Check outer filter by shinning a light through it. If small

holes or thinner parts are found on the element after
cleaning it, replace the filter.
7. Clean the inside of the air cleaner body and the inside
of the air cleaner cover. Do not use compressed air.
8. Properly install the air filter and cover.
9. After filter service be sure to install cover with arrows
pointing "UP."
NOTE: If after cleaning the outer filter, the air cleaner
FG000412
clogged indicator remains "ON," replace the
Figure 63
outer and inner filters. Do not clean inner filter.
Change of Fuel Prefilter

1. Open the left rear side door to access fuel prefilter.
2. Position a small container under prefilter. Drain fuel by
opening drain valve on bottom of filter.
regulations.
FG006961
Figure 64
3. Remove the bowl using supplied tool.

4. Remove the cartridge.
FG006962
Figure 65

4-41
5. Coat surface of packing (2, Figure 66) with fuel on new
cartridge (1).
6. Tighten the cartridge by hand until the packing comes
into contact with the surface of the filter housing head.
7. When it reach the surface, tighten the cartridge about 2
3/4 of a turn more.
8. Coat surface of seal (3, Figure 66) with fuel, and
tighten the bowl with tool.
1
FG000428
Figure 66
Change Fuel Filter
WARNING!
Exchange filter after waiting for engine to cool. Be
careful of fire hazards. Do not smoke.
1. Locate fuel filter inside engine compartment.

2. Position a small container under fuel filter. FG006315
Figure 67
3. Unscrew fuel filter from head assembly. Discard fuel

filter.
regulations.
4. After cleaning filter head, install new fuel filter. Screw
filter on head until gasket contacts head, and turn filter
1/2 turn more with a filter wrench.
NOTE: Coat fuel filter gasket with fuel.
NOTE: Fill fuel filter with clean fuel. This will help FG000478
reduce fuel system priming.
Figure 68

4-42
Fuel System Priming
1
If air remains in the fuel inlet line to the engine, it may
cause the engine to run in an abnormal condition. Air may 2
impact the starting capability of the engine, and may also
result in surging engine speeds.
If the machine happens to have run out of fuel, or if the
fuel filter has been replaced, air may need to be bleed
using the following procedure:
1. Shut down engine.
FG000431
2. Loosen plug (1, Figure 69) on the fuel prefilter head.
Figure 69
3. Pump the hand operated primer pump (2, Figure 69)
on the fuel prefilter. Pump primer until fuel is present
at plug hole in fuel prefilter head.
4. Tighten plug (1, Figure 69) in fuel prefilter head.
5. Continue to pump primer pump until a strong
resistance is felt.
6. Start engine and look for signs of leaks.
7. Repeat procedure if necessary.

4-43
1,000 HOUR / 6 MONTH
SERVICE
Perform All Daily, 50, 250 and 500 Hour

Service Checks
Grease Swing Reduction Device

2. Remove air vent plug (1, Figure 70) from swing
reduction device.
1
FG006963
Figure 70
3. Press grease fitting and inject grease with the grease

gun on the marked point (2, Figure 71).
4. Install air vent plug (1, Figure 70) in swing reduction
device.
FG006964
Figure 71

4-44
Change Hydraulic Oil Return Filter
NOTE: Change hydraulic oil return filter after first 250 hours 02/05 [MO] 11:30
of operation or rebuild, and every 1,000 hours
thereafter.
NOTE: If return filter clogged warning light (Figure 72) on E F
instrument panel comes "ON" the return filter must be

serviced. C H C H
E/G SPEED 1700 RPM

FG000760
Figure 72
WARNING!
3
The hydraulic tank is pressurized. Loosen the hydraulic
breather cap slightly to allow the pressurized air to vent. 2
After the pressure has been released, it is safe to 1
FG006965
remove either the fill cap or service covers or drain
water from the tank. Figure 73
IMPORTANT 3 4 6
Make sure to clean any dirt or water from the top of the
7
hydraulic tank, especially around the fill port and filter
ports.
5

8
2. Loosen the breather cap (1, Figure 73) slightly to
release the internal pressure.
3. Remove bolts (2, Figure 73) and service cover (3).
Remove spring (4), valve (5) O-ring (6), and bypass
strainer (7), and then filter (8).
4. Remove filter and discard.
NOTE: Used filter should always be disposed of
according to local regulations.
FG000761
5. Install new filter and a new O-ring. Install bypass Figure 74
strainer, valve and spring. Install service cover plate.
6. Tighten the breather cap (1, Figure 73).
7. Run engine for ten minutes at low idle to purge air
from circuit.
8. Check level in hydraulic oil tank (See page 4-15). Add
oil if necessary.

4-45
Change Pilot Filter
02/05 [MO] 11:30
NOTE: Change pilot filter after first 250 hours of operation or
rebuild, and every 1,000 hours thereafter.
NOTE: If pilot filter clogged warning light (Figure 75) on
instrument panel comes "ON" the pilot filter must be E F
serviced.
C H C H
E/G SPEED 1700 RPM

FG000763
Figure 75
WARNING!
operation.
Allow the system to cool down before changing pilot
filter.

FG006966
Figure 76
2. Loosen the breather cap (1, Figure 73) slightly to
release the internal pressure.
3. Locate pilot system filter assembly. See Figure 76.
4. Unscrew canister (5, Figure 77) and remove O-ring (3)
and filter cartridge (4).
NOTE: The canister will be filled with oil. Use caution 1
2
when removing this assembly. 3
5. Insert a new filter cartridge and O-ring. Apply a small
amount of oil around the entire O-ring and install the 4
canister assembly onto the filter head (1, Figure 77).
NOTE: Used filter should always be disposed of
according to local regulations. 5
FG000323
6. After changing pilot filter, vent air from pump and
Figure 77
check level of hydraulic oil tank.

4-46
Change Oil in Travel Reduction Device
(One on Each Side of Unit) 3
WARNING! 1
operating. Shut all systems down and allow them to 2
cool. Before fully removing any motor case, inspection
port plug, etc., loosen the plug slightly to allow FG006955
pressurized air to escape. Figure 78
NOTE: Drain oil after first 250 hours of operation or rebuild,

and every 1,000 hours thereafter.
1. Make sure that the machine is on firm, level ground.
2. Rotate the track until ports (1 thru 3, Figure 78) are in
their proper positions as shown.
3. Place a container under drain plug (2, Figure 78) and
remove plugs (1 thru 3) to drain the travel reduction
gear oil.
regulations.
4. Install drain plug (2, Figure 78). Refill the travel
reduction gear case with fluid through fill port (3) until
the fluid level is at port (1). Install level plug (1) and fill
plug (3).
capacity.
5. Repeat this procedure on the other travel reduction
device.

4-47
Change Air-Conditioning Outer Filter
The unit is equipped with an air filtration system which filters
out dirt and dust particles from air being circulated into
operator's cabin. This filter should be cleaned out.
NOTE: In the event that the unit is being operated in a dusty
environment, the cleaning and replacement should
be performed more frequently. If filter is damaged,
replace damaged filter with a new one.
WARNING!
(OFF) position.
NOTE: All right and left call outs are based on the operator
being seated in the operator's seat facing the front.
1. Open the door in the left front of the machine, then
remove four wing bolts and washers, and access cover
(1, Figure 79).
1
TOP
Donaldson.
FG000440
Figure 79
2. Open the cover by unscrewing the knob (1, Figure 80)

in the rear of the cabin.
FG000441
Figure 80

4-48
3. Remove filter (Figure 81) and replace with new one.
4. Reassemble in reverse order.
FG000342
Figure 81
Check Air Conditioner Refrigerant
WARNING!
Mixing of tobacco smoke and freon is deadly.
Do not smoke while servicing or recharging
air-conditioning system.
1. Run engine at about 1800 rpm. Operate for a minimum FG006968

of ten minutes to stabilize the system. Figure 82
2. Press the "HI" fan speed switch to set maximum air
flow.
3. Put the temperature control switch in maximum cooling
position.
4. Press the "Internal Air Circulation" switch.
5. Compare the flow of bubbles in the sight glass of
receiver dryer with the drawings in the following table.
CAUTION!
Overfilling refrigerant may cause dangerous
high-pressure and poor cooling action; and low
refrigerant level may cause compressor damage.
Always maintain refrigerant at normal level.

4-49
Amount of
Appearance of the Sight Glass Solutions
Refrigerant
Almost clear.
Normal Any bubbles disappear.
Charge or withdraw the system

with the correct amount of
High No bubbles are seen.
HFC-134a refrigerant.
Low A flow of bubbles is visible.
Check and Adjust Engine **

Contact your nearest DOOSAN dealer.
Engine dealer for checking and adjusting the following items:
• Engine Compression Pressure.
• Injection Pressure.
• Injection Timing.

4-50
2,000 HOUR / YEARLY
SERVICE
Perform All Daily, 50, 250, 500 and 1,000

Hour Service Checks
Change Swing Reduction Device Oil

2
NOTE: Change swing reduction device oil after first 250
hours of operation or rebuild and every 2,000 hours
thereafter.
1
WARNING!
operating. Shut all systems down and allow them to FG006969
cool. Figure 83
1. Set a container under excavator.
2. Remove cap (3, Figure 84) and install hose (4) to drain
the swing reduction device oil.
regulations.
3. After draining oil, remove hose and install cap.
3
4
FG006970
Figure 84
4. Remove breather/fill cap (2, Figure 83) and add oil to

"H" mark on dipstick (1).
H
FG000419
Figure 85

4-51
Change Outer and Inner Air Cleaner
Elements
3
WARNING!
Never clean or attempt to remove the air cleaner
element if the engine is running.
NOTE: Change outer element after cleaning 5 times or every FG000414

2,000 hours of service. Figure 86
NOTE: Change inner element whenever a new outer

element is installed.
If there is clogged filter signal on the gauge panel, use the
following procedure. 2
1. Open the access door at the rear of the cabin.

2. Remove the evacuator valve (1, Figure 87) and air
cleaner cover (2).
4
NOTE: Inspect evacuator valve seal lips for wear or 1
damage. Replace valve if necessary. Install
FG000425
evacuator valve with lips parallel to the cover.
Figure 87
3. Remove outer filter (4, Figure 87) from the air cleaner
housing.
4. Clean the air cleaner cover and the inside of the air
cleaner housing.
5. Remove inner filter (5, Figure 88).
6. Clean out inside of air cleaner housing. Do not use
compressed air to blow out housing.
7. Install new inner filter. Do not clean and reuse inner
element.
8. Install new outer filter.
9. Install air cleaner cover and evacuator valve. 5
NOTE: Make sure that all gaskets and cover are 4

properly installed and seated.
FG000426
Figure 88

4-52
Change Radiator Coolant
WARNING!
Allow the engine to cool before releasing the radiator
cap. Make sure to loosen the cap slowly to release any
remaining pressure.
Radiator cleaning is performed while the engine is
running. Take extreme caution when working on or near ARO1760L
a running engine. Make sure to lock out and tag the Figure 89
controls notifying personnel that service work is being
performed.
Do not remove the radiator cap unless it is required.
Observe the coolant level in the coolant recovery tank.
1. Slowly open the radiator cap to allow any pressure to

escape.
2. Place a container under the radiator and open the
drain valve (2, Figure 90).
regulations.
2
FG006319
Figure 90
3. Open heater shutoff valves (3 and 4, Figure 91) to

allow coolant to drain from heater core.
FG006320
Figure 91

4-53
4. Remove coolant drain plug (1, Figure 92) from engine.
5. Install drain plug, and close drain valve after coolant
has completely drained from system.
1
6. Fill cooling system with a flushing solution.
7. Run engine at low idle until the coolant temperature
gauge reaches the "BLUE ZONE." Run engine for
another ten minutes.
8. Allow engine to cool.
9. Drain flushing fluid and fill system with water.
10. Run engine again to allow water to completely circulate.
11. After allowing engine to cool, drain water and fill FG006444
system with proper antifreeze mixture for ambient Figure 92
temperature. Refer to coolant concentration table. See
“Antifreeze Concentration Tables” on page 4-76.
12. Run engine without radiator cap installed, so that all air
will be purged from system. Fill radiator to fill neck.
13. Drain and fill radiator coolant recovery tank.
Hydraulic Oil Exchange and Suction

Strainer Cleaning
WARNING!
ARO1760L
The hydraulic tank is pressurized. Loosen the breather
cap to allow the pressurized air to vent. After the Figure 93
pressure has been released, it is safe to remove either
the fill cap or service covers.
IMPORTANT
Make sure to clean any dirt or water from the top of the
hydraulic tank, especially around the fill port and filter
ports.
Hydraulic oil change interval is 2,000 hours, only when
DOOSAN Genuine Oil is used. If another brand of oil is
used, guaranteed change interval is 1,000 hours.
NOTE: Based on the type of excavating being completed,

the working conditions (extremely hot or dusty) and
the extra front end attachments being used (hydraulic
breaker, etc.), the hydraulic fluid will need to be
changed more frequently.

4-54
1. Position the machine on firm, level ground. Swing
upper structure perpendicular (90°) to tracks. Lower
boom and position bucket on ground as shown in
Figure 94.
3. Shut down engine.
4. Release pressurized air from hydraulic tank by rotating
breather cap (1, Figure 97).
FG006974
Figure 94
5. Drain hydraulic oil from tank into a container capable of

holding 280 liters (74 U.S. gal.). After draining tank,
install drain plug.
IMPORTANT
Be careful of squirting oil when removing drain
plug.
NOTE: Used filter and used oil should always be FG006975

disposed of according to local regulations. Figure 95
6. Carefully remove bolts and cover (2, Figure 97) from

top of hydraulic oil tank. There is a spring (3) under
the cover that will force the cover up.
7. Remove spring (3, Figure 97) and strainer (5), by
pulling on rod (4).
A
8. Clean inside and outside of strainer. Replace strainer if
it is broken.
9. Position strainer (5, Figure 97) on boss portion of
suction pipe (6).
NOTE: Measurement "A" is 650 mm (25.59 in).
HAOC411L
Figure 96

4-55
10. Fill the hydraulic oil tank. Check level using sight
gauge on side of tank. 1
2
11. Place spring (3, Figure 97) on rod (4) and assemble
cover (2).
12. After replacing and cleaning the hydraulic oil, filter and
strainer, vent the system. See “Venting and Priming
Hydraulic System” on page 4-83. 3
IMPORTANT 4
When the hydraulic breaker is being used, due to

the higher heat generated by this unit, use
replacement intervals recommended under the 5
“Hydraulic Oil and Filter Service Intervals” on
page 3-37.
6
13. Check level of hydraulic oil tank. (See page 4-15)
ARO1720L
Figure 97
Check Alternator and Starter**

**These checks need to be completed by an authorized
DOOSAN dealer.
Check All Rubber Antivibration Shock

Mounts
Perform and Record the Results of the

Cycle Time Tests
Inspect Machine to Check for Cracked

or Broken Welds or other Structural
Damage
Check, Adjust Valve Clearance **
Check Head Bolt Torques

4-56
4,000 HOUR / BIENNIAL
SERVICE
Major Parts - Periodic Replacement

To ensure safe operation and work, perform periodic
inspections. Also, to increase safety, replace the following
parts. These parts are the ones most often subjected to
abrasion, heat and fatigue. Exchange these parts with new
ones at the designated time intervals, even if the old parts
look good.
Always replace all related parts such as gaskets and
O-rings. Use only original equipment manufacturers parts.
Major Component Parts Name to be Exchanged Periodically Time to Exchange

Engine Fuel hose (Tank to fuel prefilter) 2 years or 4,000 hours
Fuel hose (Fuel prefilter to fuel cooler)
Fuel hose (Fuel cooler to ECU)
Fuel hose (Tank to CP pump)
Heater hose (Heater to engine)
Heater hose (Heater to radiator)
Air Conditioner hose
Hydraulic Body Pump suction hose
System Pump discharge hoses
Pump side branch hoses
Swing motor hoses
Travel motor hoses
Work Boom cylinder line hoses
Device Arm cylinder line hoses
Bucket cylinder line hoses

4-57
12,000 HOUR / SIX YEAR
SERVICE
Hose In-service Lifetime Limit (European

Standard ISO 8331 and EN982 CEN)
European regulations state that the in-service life of any
hydraulic hose may not exceed six years. DOOSAN
recommends the following;
• Hoses at the customer premises cannot be stored
more than 2 years before being discarded or installed
on a machine.
• In-service lifetime of hoses fitted on a machine can
never exceed 6 years, but replace hoses described in
“Major Parts - Periodic Replacement” on page 4-57,
every 2 years. Always replace hoses having
exceeded the allowed in-service lifetime irrespective
of the external appearance/wear.
• Always store hoses in a dark place at a maximum of
65% relative humidity, between 0˚C (32˚F) and 35˚C
(95˚F) but as close as possible to 15˚C (59˚F) and
away from copper, manganese or tube generating
Ozone.

4-58
AIR-CONDITIONING SYSTEM
NOTE: See “Clean Air-Conditioning Outer Filter” on
page 4-37.
Check Control Panel

When a function switch is pushed, the last setting has to be
displayed on the LCD display.
When the light switch is turned to "I" position, the LED for
illumination in the control panel has to turn "ON."
Check Air Conditioner Hoses

Check the hose for cracking and damage.
CAUTION!
When a leak occurs, dirt will accumulate in the area
where the leak is. Consult a DOOSAN distributor or
sales agency.
Check Condenser
Inspect the condenser for dust and debris. Clean if
necessary.
NOTE: See “Clean Radiator, Oil Cooler, Intercooler, Fuel
Cooler and Air Conditioner Condenser Core” on
page 4-39.
Check Magnetic Clutch

Check the magnetic clutch for dirt and interference.
Push the "A/C" switch in order to energize magnetic clutch
and check the magnetic clutch.
Check Belt Tension

NOTE: See “Check Engine Fan Belt Tension” on page 4-31.

4-59
BOLT AND NUT INSPECTION
Inspect ALL fasteners after the first 50 hours of operation
and every 250 hours thereafter. If any are loose or are
missing tighten them or install new hardware. Always use a
calibrated torque wrench.
IMPORTANT
Always clean fasteners before tightening.
If counterweight is loose, contact a DOOSAN distributor
or sales agent.
.
NO. POINT TO BE INSPECTED BOLT QTY. BOLT TORQUE
DIA. HEAD kg•m Nm ft lb
MM SIZE
Joint bolt with engine pump side 16 8 24 24.5 240 177
1 mounting bracket and
fan side 10 8 17 5 49 36
engine
Joint bolt and nut pump side 20 2 30 46 451 333
2 between engine mount-
fan side 20 2 30 46 451 333
ing bracket and frame
3 Radiator mounting bolt 16 4 24 27 265 195
4 Tightening bolt for hydraulic oil tank 16 6 24 27 265 195
5 Tightening bolt for fuel tank 16 6 24 27 265 195
6 Tightening bolt for pump 20 4 17 (S) 49 480 354
7 Tightening bolt for control valve 16 4 24 27 265 195
Tightening bolt for swing reduction
8 24 12 36 95 931 687
device
9 Tightening bolt for swing motor 12 12 10 (S) 14.4 141 105
10 Tightening bolt for battery 10 2 17 5 49 36
Joint bolt with cabin mounting rubber
24 35 36 95 931 687
and frame
11
Joint bolt with cabin mounting rubber
24 35 36 95 931 687
and cabin
Joint bolt with swing bearing and upper
20 36 30 55 539 398
frame
12
Joint bolt with swing bearing and bot-
20 36 30 55 539 398
tom frame
Tightening bolt for travel device 20 40 30 49 480 354
13
Tightening bolt for sprocket 18 52 27 45 441 325
14 Tightening bolt for upper roller 20 4 30 55 539 398
15 Tightening bolt for bottom roller 16 80 24 27 265 195
16 Tightening bolt for track guard 16 16 24 27 265 195
17 Bolt for track shoes 20 408 27 78 765 564
18 Fixing bolt for front pin 16 10 24 27 265 195
19 Breaker Filter (Optional) 1 30 27 265 195
20 Grease valve for track adjuster PF 1/2 2 27 14 137 101

4-60
1. Joint bolt with engine mounting bracket and engine
1) Pump side
• Tool: 24 mm ( )
• Torque: 24.5 kg•m (240 Nm, 177 ft lb)
FG006971
Figure 98
2) Fan side
• Tool: 19 mm ( )
FG006972
Figure 99
2. Joint bolt and nut between engine mounting bracket

and frame
1) Pump side
• Tool: 30 mm ( )
• Torque: 46 kg•m (451 Nm, 333 ft lb)
FG006981
Figure 100
2) Fan side
• Tool: 30 mm ( )
FG006982
Figure 101

4-61
3. Radiator mounting bolt
• Tool: 24 mm ( )
FG006983
Figure 102
4. Tightening bolt for hydraulic oil tank
• Tool: 24 mm ( )
FG006984
Figure 103
5. Tightening bolt for fuel tank
• Tool: 24 mm ( )
FG006985
Figure 104
6. Tightening bolt for pump
• Tool: 17 mm ( )
FG006986
Figure 105

4-62
7. Tightening bolt for control valve
• Tool: 24 mm ( )
FG006987
Figure 106
8. Tightening bolt for swing reduction device
• Tool: 36 mm ( )
FG006988
Figure 107
9. Tightening bolt for swing motor
• Tool: 10 mm ( )
FG008041
Figure 108
10. Tightening bolt for battery
• Tool: 17 mm ( )
FG001428
Figure 109

4-63
11. Joint bolt with cabin mounting rubber and frame
• Tool: 17 mm ( )
FG000454
Figure 110
Joint bolt with cabin mounting rubber and cabin
• Tool: 24 mm ( )
FG000455
Figure 111
12. Joint bolt with swing bearing and upper frame
• Tool: 36 mm ( )
FG006989
Figure 112
Joint bolt with swing bearing and bottom frame
• Tool: 36 mm ( )
FG006990
Figure 113

4-64
13. Tightening bolt for travel device
• Tool: 30 mm ( )
FG006991
Figure 114
Tightening bolt for sprocket
• Tool: 27 mm ( )
FG006996
Figure 115
14. Tightening bolt for upper roller
• Tool: 30 mm ( )
FG000460
Figure 116
15. Tightening bolt for bottom roller
• Tool: 24 mm ( )
FG000461
Figure 117

4-65
16. Tightening bolt for track guard
• Tool: 24 mm ( )
FG000462
Figure 118
17. Bolt for track shoes
• Tool: 27 mm ( )
FG000463
Figure 119
18. Fixing bolt for front pin
• Tool: 24 mm ( )
FG000464
Figure 120

4-66
19. Fixing breaker filter (Optional)
• Tool: 30 mm ( )
FG006992
Figure 121
20. Grease valve for track adjuster
• Tool: 27 mm ( ) 2
1
3
FG000163
Figure 122

4-67
BUCKET
Bucket Tooth Replacement
WARNING!
Due to the possibility of flying metal objects, always
wear safety helmet, protective gloves and eye protection
when changing bucket teeth.
Curl the bucket upwards and place the round rear
surface of the bucket firmly on the ground. Shut the
engine off and lock out the hydraulic controls before
working on the bucket.
NOTE: These instructions are only for DOOSAN OEM

buckets. If you are using other manufacturers
buckets, refer to their specific instructions.
HAOC680L
Figure 123
1. On a routine basis, inspect bucket teeth to make sure

that tooth wear or breakage has not developed. Do not
allow replaceable bucket teeth to wear down to a point
that bucket adapter is exposed. See Figure 123.
2. To replace a tooth (1, Figure 124), use a hammer and
punch to drive locking pin (2) and lock washer (3) out
of tooth adapter (4). 4
3. Once worn tooth has been removed, use a putty knife 3

to scrape adapter as clean as possible.
4. Slide new tooth into position and insert lock washer. 2 1 FG000346
Figure 124
5. Insert locking pin into tooth and with a hammer, drive
pin in until lock washer seats in locking groove.

4-68
Bucket O-ring Replacement
WARNING!
Due to possibility of flying metal objects, always wear
safety helmet, protective gloves and eye protection
when changing pins.
1. Inspect bucket O-rings on a routine basis. If worn or

damaged, replacement is necessary.
FG006993
Figure 125
2. Roll old O-ring (1, Figure 126) onto boss (2) around
bucket pin (3). Remove bucket pin and move arm or
1 4
bucket link (4) out of way. 2
ARO1390L
Figure 126
3. Remove old O-ring and temporarily install new O-ring

(1, Figure 127) onto bucket boss (2). Make sure that 1 4
O-ring groove on both bucket link (4) and boss have 2
been cleaned.
4. Realign arm or link with bucket pin hole and insert
bucket pin (3, Figure 126).
ARO1391L
Figure 127

4-69
5. Roll new O-ring (1, Figure 128) into O-ring groove.
ARO1392L
Figure 128

4-70
ELECTRICAL SYSTEM
NOTE: Never disassemble electrical or electronic parts.
Consult with a DOOSAN distributor or sales agency
before servicing.
Battery
WARNING!
Battery electrolyte contains sulfuric acid and can quickly
burn the skin and eat holes in clothing. If you spill acid
on yourself, immediately flush the area with water.
Battery acid could cause blindness if splashed into the
eyes. If acid gets into the eyes, flush them immediately
with large quantities of water and see a doctor at once.
If you accidentally drink acid, drink a large quantity of
water or milk, beaten egg or vegetable oil. Call a doctor
or poison prevention center immediately.
When working with batteries, always wear safety glasses
or goggles.
Battery generates hydrogen gas, so there is danger of
an explosion. Do not bring lighted cigarettes near the
battery, or do anything that will cause sparks.
Before working with batteries, shut down engine and
turn the starter switch to the "O" (OFF) position.
Avoid short circuiting the battery terminals through
accidental contact with metallic objects, such as tool.
When removing or installing, check which is the positive
(+) terminal and negative (-) terminal.
When removing the battery, first disconnect the negative
(-) terminal. When installing the battery, first connect the
positive (+) terminal.
If the terminals are loose, there is danger that the
defective contact may generate sparks that will cause an
explosion. When installing the terminals, install them
tightly.
Batteries in Cold Weather

In colder weather a greater drain is placed on the batteries
when they are used for the preheat cycle and when starting
a cold engine. Battery performance decreases as the
temperature gets lower.
In extremely cold weather, remove the batteries at night and
move them to a warm location. This will help to keep them
at a higher power level.

4-71
Inspection of Battery Electrolyte Level
This machine has two maintenance free batteries. They
never require the addition to water.
When the charge indicator becomes transparency, it means
low electrolyte state because of the leakage or charging
system error. Determine the cause of problem and replace
the batteries immediately.
Check Charging State

FG000347
Check charging state through the charging indicator.
Figure 129
• GREEN: Sufficiently charged.
• BLACK: Insufficient charged.
• TRANSPARENT: Replace battery.
Check the Battery Terminals

Be certain that the battery is held securely in its
compartment. Clean the battery terminals and the battery
cable connectors. A solution of baking soda and water will
neutralize acid on the battery surface, terminals, and cable
connectors. Petroleum jelly or grease can be applied to the
connectors to help prevent corrosion.
Battery Replacement
When the charging indicator indicates transparency state, HAOU790L
replace the battery. The batteries should always be replaced Figure 130
in pairs.
Using an old battery with a new one will shorten the life
span of the new battery.
Fuses
1. The fuses in the fuse box are used to protect the
various electrical circuits and their components from
O X
being damaged. See Figure 131. The fuses used are
standard automotive type fuses.
2. The section on “Fuse Identification” on page 4-74, lists
the circuits and the fuse amperage required for each
circuit. If a fuse blows, determine the cause and repair
any faults or failures.
HAOC670L
3. Do not insert a higher amperage fuse into a lower
Figure 131
amperage slot. Serious damage to the electrical
components or fire can result.

4-72
CAUTION!
Before replacing a fuse, be sure to turn starter switch to
"O" (OFF) position.
Fuse Boxes
There are two fuse boxes (Figure 132) on the left side of
the heater box. The fuses prevent electrical devices from
overloading or shorting.
A decal attached to the inside of the fuse box's cover
indicates the function and amperage of each fuse.
Spare fuses are mounted on the inside of fuse box's cover.
(One each of a 10A, 15A, 20A and 30A.)
Change a fuse if the element separates. If the element of a
FG000110
new fuse separates, check the circuit and repair the circuit.
Figure 132
CAUTION!
Always replace fuses with the same type and capacity
fuse that was removed. Otherwise, electrical damage
could result.

4-73
Fuse Identification
Fuse Box (1) Fuse Box (2)
FG000542
Figure 133
Fuse Box One Fuse Box Two

No. No.
Name Capacity Name Capacity
1 Warning Light (Optional) 10A 1 Horn 10A
2 2-pump (Optional) 10A 2 Quick Clamp (Optional) 10A
3 Cigar Lighter 10A 3 Travel Alarm (Optional) 10A
4 12V Power 10A 4 Auxiliary Mode 10A
5 Wiper, Washer 10A 5 Check Connector 10A
6 Lower Wiper (Optional) 10A 6 Pilot Cutoff 10A
7 Stereo 10A 7 Memory Backup 10A
Starter Switch, Hour
8 10A 8 Room Light 10A
Meter
9 Spare 30A 9 Cabin Light (Optional) 30A
10 Air Conditioner, Heater 20A 10 Work Light 20A
11 Shear, Breaker (Optional) 15A 11 Fuel Heater 20A
Instrument Panel, Pressure
12 Seat Heater (Optional) 15A 12 15A
Sensor
e-EPOS, Booster, Travel
13 15A 13 Headlight 15A
speed changer, Booster
14 ECU 15A 14 Fuel Pump (Optional), Wiper 15A

4-74
ENGINE COOLING SYSTEM
GENERAL
Keeping an engine's cooling system in peak operating
condition, can have many benefits to keeping a machine in
good operating condition. A properly functioning cooling
system will; improve fuel efficiency, reduce engine wear, and
extend component life.
Always use distilled water in the radiator. Contaminants in
tap water neutralize the corrosion inhibitor components. If
tap water must be used, it should not exceed 300 ppm
hardness, or contain more than 100 ppm of either chloride
or sulfate. Water that has been treated with a water softener
also contains salt that will cause corrosion of components.
Water from creeks and stagnant pools usually contains dirt,
minerals and/or organic material that are deposited in the
cooling system and impair cooling efficiency. Distilled water
is the best.
Engine overheating is often caused by bent or clogged
radiator fins. The spaces between the fins can be cleaned
by use of air or water under pressure. When straightening
bent fins, use care not to damage the tubes or break the
bond between the fins and the tubes.
WARNING!
Pressure at air nozzle must not exceed 30 PSI (2.1
kg/cm2). Always wear goggles when using
compressed air.
Do not pour cold water into radiator when engine is
very hot and water level is below the top of the
tubes. Such action could result in damage to engine
cylinder heads.
Heavy duty diesel engines require a balanced mixture of

water and antifreeze. Drain and replace the mixture every
year or 2,000 hours of operation, which ever comes first.
This will eliminate buildup of harmful chemicals.
Antifreeze is essential in any climate. It broadens the
operating temperature range by lowering the coolant's
freezing point and by raising its boiling point. Do not use
more than 50% antifreeze in the mixture unless additional
freeze protection is required. Never use more than 68%
antifreeze under any condition.

4-75
Types of Antifreeze
There are two main classifications of antifreeze available on
the market today.
1. Ethylene Glycol - Standard Life Antifreeze
2. Propylene Glycol - Extended Life Antifreeze
Ethylene glycol (standard life antifreeze) has been on the
market for many years. Its chemical properties do not
provide the improved corrosion resistance that propylene
glycol (extended life antifreeze) does. Ethylene glycol is also
very hazardous to the environment, people and animals.
DOOSAN recommends that ethylene glycol be replaced with
propylene glycol.
The newer propylene glycol antifreeze comes in many
different colors. Some of the colors are pink, red, orange
and yellow. There are even some that come in a blue-green
color. The blue-green color makes it very difficult to tell the
difference of what type of antifreeze is in a cooling system.
The colors are only a dye added to the clear antifreeze. Do
not rely on color. Keep careful machine records of what
brand and type of antifreeze is used in the unit. If you are
unsure of what type of antifreeze is in the system, drain and
flush the system.
NOTE: Do not mix ethylene glycol and propylene glycol
antifreeze together. If the two are mixed, the
protection level will be reduced to the level of the
ethylene glycol.
ANTIFREEZE CONCENTRATION TABLES
Ethylene Glycol - Standard Life Antifreeze

(1,000 Hour / 6 Months)
Ambient Temperature Cooling Water Antifreeze
-10°C (14°F) 80% 20%
-15°C (5°F) 73% 27%
-20°C (-4°F) 67% 33%
-25°C (-13°F) 60% 40%
-30°C (-22°F) 56% 44%
-40°C (-40°F) 50% 50%
Propylene Glycol - Extended Life Antifreeze

(2,000 Hour / Yearly)
Ambient Temperature Cooling Water Antifreeze
-10°C (14°F) 78% 22%
-15°C (5°F) 71% 29%
-20°C (-4°F) 65% 35%
-25°C (-13°F) 59% 41%
-30°C (-22°F) 55% 45%
-40°C (-40°F) 48% 52%

4-76
FUEL TRANSFER PUMP
(OPTION)
WARNING!
Do not dry operate fuel pump for more than fifteen
seconds.
• Cooling and lubrication of pump is achieved
by fuel passing through pump. If pump is dry
operated, heat generated by moving parts will
cause damage to pump rotors, vanes and
seals. To prevent unnecessary wear and/or
damage to pump do not dry operate fuel pump
for more than fifteen seconds.
Do not operate pump for more than fifteen minutes at a
time.
• Continuous usage of pump over recommended
time interval will cause overheating of motor
and will result in causing motor damage.
Do not use refueling pump for other types of fuel or
fluids. (Use only for diesel fuel.)
• Do not use refueling pump for other types of
fuel which have a low flash point.
• Do not use refueling pump for fuel
contaminated with water or high humidity.
Moisture in pump mechanism can cause rust
and can create pump failure.
Always operate pump using strainer installed on inlet
hose. This will prevent any foreign materials from being
introduced into pump. Always maintain pump and all of
its components in a clean condition.
• If dirt or other foreign materials enter pump, it
can become lodged between the rotor and/or
vanes and generate heat which can cause
pump damage.
• Do not remove strainer or use a strainer with
larger mesh to increase flow of fuel.
Be careful not to overfill or spill fuel.
Make sure direction of check valve is in line with flow
direction of fuel.
If any pump parts or components become lost, damaged
or inoperable, immediately replace it with a new ones.

4-77
IMPORTANT
If there are any sign of leakage while operating transfer
pump, inspect the following components to prevent any
fires or hazardous fuel spills.
• Check all hoses leading to and from the
transfer pump.
• Check all hose clamps.
• Check transfer pump inlet port.
The transfer pump is used to transfer fuel from a refueling

source to the fuel tank. A check valve is installed in the
inlet hose to prevent fuel from flowing back from fuel tank to
source. A strainer is installed in inlet hose to prevent any
foreign material from being introduced into transfer pump or
fuel tank.
A thermal limiter, built into the motor, will automatically shut off
power if motor is overheating to protect it from being damaged.
FUEL
4 3 2 5
FUEL TANK
IN OUT
FG000161
Figure 134
Reference Reference
Number Number
1 Body 4 Strainer Cap
2 Check Valve 5 Inlet Hose
3 Strainer

4-78
1. Remove strainer cap (4, Figure 134) from strainer (3)
on end of inlet hose (5).
NOTE: Keep strainer cap (4, Figure 134) in a safe
location to reseal strainer (3) after refueling is
complete. I
O
2. Insert inlet hose (5, Figure 134) into refueling tank.
3. Turn fuel pump switch (Figure 135) inside of battery
box on front side to "I" (ON) position.
NOTE: Transfer pump rate of flow is approximately 35
FG003379
liters/minute (9.24 U.S. gpm). Use extra care
Figure 135
not to overfill fuel tank so that fuel does not over
flow.
4. Once fuel transfer is completed, immediately turn
switch to "O" (OFF) position to stop pump.
5. Lift inlet hose (5, Figure 134) from fueling source and
turn switch to "I" (ON) position for two - three seconds
to drain remaining fuel from hose to fuel tank.
6. Install strainer cap (4, Figure 134) on inlet strainer (3)
and return hose (5) to storage position.

4-79
HANDLING OF ACCUMULATOR
WARNING!
Even though the engine is stopped, the hydraulic
accumulators for the pilot system are still charged. Do
not disconnect any pilot system hoses until accumulator
pressure has been released from the circuit. To release
pressure, turn the starter switch to the "I" (ON) position
and operate all hydraulic control levers and forward/
reverse travel levers. Even though the engine is
shutdown hydraulic actuated components may move
while releasing pilot pressure. Keep all personnel away
from excavator while performing this operation.
• Set safety lever on "LOCK" position after
stopping engine.
• DO NOT mishandle accumulator(s). They are
very dangerous because they contain
high-pressure nitrogen gas.
• DO NOT punch a hole or apply heat or fire to
an accumulator.
• DO NOT weld on accumulator, or try attaching
anything to it.
• When replacing an accumulator, contact a
DOOSAN distributor or sales agency so the
gas can be properly released.
• Wear safety goggles and protective gloves
when working on an accumulator. Hydraulic oil
under pressure can penetrate the skin and
cause serious injuries.
Release pilot accumulator pressure using the following

procedure;
2. Set safety lever on "RELEASED" position.
3. Turn starter switch to the "I" (ON) position.
4. Fully stroke work and travel levers in all directions.
FG001443
6. Turn key to "O" (OFF) position and remove from starter
switch. Figure 136
7. Remove accumulator by unscrewing it slowly.

4-80
TRACK TENSION
WARNING!
Safely measuring track tension requires two people. One
person must be in the operator's seat, running the
controls to keep one side frame in the air, while the
other person makes dimensional checks. Take all
necessary precautions to make sure the machine won't
move or shift position during service. Warm up the
engine to prevent stalls, travel the excavator to an area
that provides level, uniform ground support and/or use
support blocks when necessary.
The track adjusting mechanism is under very
high-pressure. NEVER release pressure too suddenly.
The grease cylinder valve should never be backed off
more than one complete turn from the fully snugged
down position. Bleed off pressure slowly and keep your
body away from the valve at all times.
Track shoe link pins and bushings wear with normal usage,
reducing track tension. Periodic adjustment is necessary to
compensate for wear and it may also be required by
working conditions.
1. Track tension is checked by jacking up one side of the
excavator. See Figure 137. Place blocking under frame
while taking measurement.
90 ~ 110
FG006994
Figure 137
2. Measuring the distance (A, Figure 138) between the

bottom of the side frame and the top of the lowest
crawler shoe. Recommended tension for operation over
most types of terrain is 320 - 340 mm (12.60 -
13.39 in)
NOTE: This measurement can be thrown off if there is
too much mud or dirt or other material in the A
track assembly. Clean off the tracks before
checking clearance.
3. Too little sag in the crawler track (less than 320 mm
FG000162
(12.60 in) clearance) can cause excessive component
Figure 138
wear. The recommended adjustment can also be too
tight causing accelerated stress and wear if ground

4-81
conditions are wet, marshy or muddy, or if the ground
is hard and full of rocks or gravel.
4. The increased clearance recommended for muddy
ground conditions is between 340 - 370 mm (13.39 -
14.57 in). The clearance should be approximately
370 mm (14.57 in) for operation over gravel, rocky
terrain, or over sand or snow.
WARNING!
The track adjusting mechanism is under very
high-pressure. NEVER release pressure too
suddenly. The grease cylinder valve should never
be backed off more than 1 complete turn from the
fully snugged down position. Bleed off pressure
slowly and keep your body away from the valve at
all times. If there is problem in the fitting thread,
the valve or fitting might be ejected at high speed
to cause fatal wound.
5. Track tension adjustments are made through the

grease fitting (1, Figure 139) in the middle of each side
frame. Adding grease increases the length of an 2
adjustment cylinder (2). The longer the adjustment
cylinder, the greater the pressure on the tension spring
pushing the track idler wheel outward.
6. If there is not enough slack or clearance in the tracks
and the adjustment is too tight, the idler wheel and
adjusting cylinder can be retracted by bleeding off 1
grease through hole in valve (3, Figure 139) by 3
loosening valve slowly (3, Figure 139). FG000163
NOTE: After track tension is adjusted by loosening Figure 139

valve, be sure to tighten valve (3, Figure 139)
with 14 kg•m (137 Nm, 101 ft lb).
WARNING!
Do not loosen or remove the grease fitting (1,
Figure 139) until the pressure is entirely bleed off
by loosening valve (3, Figure 139) slowly.

4-82
VENTING AND PRIMING
HYDRAULIC SYSTEM
Main System Pump

NOTE: If pump is run without sufficient oil in the main
hydraulic pump, damage can occur. Always vent
pump of air after draining hydraulic system.
1. With the engine stopped, remove vent plug (Figure
140) to see if any oil is present.
2. If oil is not present, fill pump with oil through port
(Figure 140).
3. Install vent plug (Figure 140) first. FG000158
Figure 140
4. Start engine and run it for several minutes at low idle
engine speed. This will pressurize the hydraulic oil tank
and system.
5. Slowly loosen vent plug (Figure 140) several turns, until
hydraulic oil flows out of plug. This shows that air has
been released.
6. Tighten the plug (Figure 140).
Hydraulic Cylinders
IMPORTANT
If cylinders are operated in high idle after the hydraulic
system has been drained or the cylinder has been
rebuilt, damage to piston packing and seals may occur.
Always vent air from cylinders at low idle and at a slow
speed.
1. Run engine at low idle. Extend and retract each

cylinder to within 100 mm (4 in) of fully stroking it 4 -
5 times.
2. Operate fully extend and retract each cylinder 3- 4
times.
3. Repeat procedure until cylinders extend and retract
smoothly.

4-83
Swing Motor
IMPORTANT
If the air is not vented from the system, it will cause
damage to the swing motor and bearings.
NOTE: Perform this only when oil has been drained from
swing motor. FG006995
1. Shut down engine. Figure 141
2. Disconnect drain hose and fill swing motor case with

hydraulic oil.
3. Connect the drain hose.
4. Start engine and set throttle at "LOW IDLE" and swing
upper structure slowly two full revolutions to the left
and right.
Travel Motor
NOTE: Perform this only when oil is drained from travel
motor
1. Shut down engine
2. Disconnect drain hose (Figure 142) and fill motor case
with hydraulic oil.
3. Connect drain hose.
4. Start engine and set engine speed control dial to "LOW FG006998
IDLE." Run the engine for one minute and slowly drive
Figure 142
excavator forwards and backwards.
General Venting
1. After venting air from all components, shut the engine
down and check the hydraulic oil level. Fill hydraulic oil
tank to "H" mark on sight gauge.
2. Start engine and operate all controls again, run engine
for five minutes to ensure all systems have been vent
and purged of air. Set engine speed to "LOW IDLE,"
and check hydraulic oil level again. Add oil as
necessary.
3. Check for oil leaks and clean all fill and venting
locations.

4-84
LONG TERM STORAGE
Perform the following if storing the excavator for more than
one month.
Conditions Maintenance Required

Cleaning Pressure wash the undercarriage and track assemblies.
Inspect for damage or loose or missing parts.
Lubrication Perform all daily lubrication procedures.
Apply a coating of light oil to the exposed plated metal
surfaces, such as hydraulic cylinder rods, etc.
Apply a coating of light oil to all of the control linkages and
control cylinders (control valve spools, etc.).
Battery Remove the battery from the excavator or remove the
battery leads from the battery to fully charge and store.
Cooling System Inspect the coolant recovery tank to make sure that the
antifreeze level in the system is at the correct level.
Every 90 days, use a hydrometer to measure the protection
level of the coolant. Refer to the antifreeze/coolant
protection chart to determine the amount of protection the
cooling system requires. Add coolant as required.
Hydraulic System Once a month, start the engine and follow the "Hydraulic
Oil Warm-up" procedures listed in this manual.

4-85
MAINTENANCE IN SPECIAL
CONDITIONS
NOTE: See “Operation Under Unusual Conditions” on
page 3-43 for other recommendations.
Conditions Maintenance Required

Operating in mud, water or rain. Perform a walk around inspection to check for any loose
fittings, obvious damage to the machine or any fluid
leakage.
After completing operations, clean mud, rocks or debris
from the machine. Inspect for damage, cracked welds or
loosened parts.
Perform all daily lubrication and service.
If the operations were in salt water or other corrosive
materials, make sure to flush the affected equipment with
fresh water.
Operating in an extremely dusty or hot Clean the air intake filters on a more frequent basis.
environment. Clean the radiator and oil cooler fins to remove embedded
dirt and dust.
Clean the fuel system intake strainer and fuel filter more
frequently.
Inspect and clean as required the starter and alternator.
Operating in rocky terrain. Check the undercarriage and track assemblies for damage
or excessive wear.
Inspect for loose or damaged fittings or bolts.
Relax track tension.
On a more frequent basis, inspect the front end
attachments for damage or excessive wear.
Install a top guard and front guard as required for
protection against falling rock.
Operating in extreme cold. Use the proper fuel for the temperature conditions.
Using a hydrometer, check the antifreeze to make sure that
it is providing the proper cold weather freeze protection.
Verify the condition of the batteries. In extremely cold
weather remove the batteries at night and store them in a
warmer area.
Remove mud buildup as soon as possible to prevent it
from freezing to the undercarriage and causing damage.

4-86
OP000485
5Transportation
Obey all local, state or federal regulations for the transportation
of the excavator. If unsure of regulations check with local
authorities.
Check the intended route for road width, overhead clearances,
weight restrictions, and traffic control regulations. Special
approval or permits may be required.
LOADING AND UNLOADING
Warning for Counterweight and Front

Attachment Removal
DANGER!
DOOSAN warns any user, that the removal of the
counterweight from the machine, front attachment or any
other part, may affect the stability of the machine. This
could cause unexpected movement, resulting in death or
serious injuries. DOOSAN is not liable for any misuse.
Never remove the counterweight or front attachment unless
the upper structure is in-line with the lower structure.
FG006999
Never rotate the upper structure once the counterweight or
Figure 1
front attachment has been removed.
Transportation OP000485
5-1
WARNING!
When transporting the machine, know the width, height,
length and weight.
Loading or unloading the machine can be a dangerous
operation. Make sure to run the engine at the lowest speed
setting, and travel at the slowest speed possible.
Make sure that the ramp being used can handle the weight
of the machine. If required, add blocking under the ramp for
additional support.
Make sure that the ramp surface is free of grease or mud
that could cause the machine to slip or slide.
Make sure that the trailer is parked on firm, level ground
before attempting to load/unload the excavator.
If it is required to turn the machine while it is on the trailer,
make sure to do this at the slowest engine and travel
speeds possible.
Make sure to secure the excavator onto the trailer as
required by local transportation laws.
Total Height Total Width Total Length Weight Remarks

3,100 mm 3,200 mm 10,560 mm 24.6 metric tons 5.9 m Boom
(10' 2") (10' 6") (415.8 in) (27.1 tons) 3.0 m Arm
600 G Shoe
1. Make sure that the trailer is parked on firm, level ground.

See Figure 2.
2. Make sure that the ramps that are being used are designed
to handle the weight of the excavator. If required, add
90 ~ 110
blocking under the ramp to provide additional support.
3. The ramp angle should be less than or not exceeding a 15°
angle. Ramps steeper than this may cause a problem
when loading or unloading.
15 FG007000
Figure 2
5-2
4. Set the travel speed selector switch to "O" (OFF) position.
See Figure 3.
O
I
II
FG000023
Figure 3
5. Turn "OFF" auto idle selector button (1, Figure 4). The
indicator light (2) will not be lit. 2
1
6. Set engine speed to "LOW IDLE."
POWER
AUTO
1 2 3 4
ESC
5 6 7 8
FG000164
Figure 4
7. If the machine is equipped with work equipment, set the

work equipment at the front, and travel forward to load it.
90 ~ 110
15 FG007000
Figure 5
8. The unit does not require disassembly for normal

over-the-road transportation. If the boom and arm need to
be removed, the counterweight will place more weight on
the rear of the machine. Make sure to back the excavator
onto the trailer so that the counterweight end of the
excavator is positioned on the ramp first. See Figure 6.
15
FG007002
Figure 6
5-3
9. Extend bucket and arm cylinders to maximum length and
then lower the boom slowly.
FG007003
Figure 7
Unlock
lock
FG001091
Figure 8
11. Shut down engine by turning key to "O" (OFF) position

(Figure 9). O I
12. Remove key from starter switch.
FG000175
Figure 9
13. Make sure to secure the excavator onto the trailer before
transporting. Place blocking (1, Figure 10) in front of
and behind each track. Use chains or cable tie-downs
(2) as required by local transportation laws.
14. Refer to the Dimensions for Transportation table and
1 1
drawing for overall machine height and width
measurements. Make sure to position the excavator as
shown. If not transported in this position, the height
measurements may be different. 2
FG007001
Figure 10
5-4
LIFTING WITH SLING
WARNING!
Improper lifting can allow load to shift and cause injury or
damage.
1. Refer to “Specification” on page 7-1 of this manual for

information on weight and dimensions.
2. Use properly rated cables and slings for lifting.
3. Position machine for a level lift.
4. Lifting cables should have a long enough length to prevent
contact with the machine. Spreader bars may be required.
NOTE: If spreader bars are used, be sure that cables
are properly secured to them and that the angle Figure 11
of the cables is factored into the lift strength.
5-5
5-6
OP000013
6Troubleshooting
Anytime that a malfunction occurs, take immediate corrective
action. Check for and investigate the cause of the malfunction. A
schedule maintenance program can prevent malfunctions from
occurring by doing preventative maintenance. A systematic
approach should be taken to troubleshooting, since several
overlapping malfunctions may give the appearance of a problem
that does not exist. If cause for the malfunction cannot be
determined, contact your DOOSAN distributor. Never perform an
adjustment of or disassembly of, hydraulic components,
electrical and electronic components, without first consulting a
DOOSAN distributor.
ELECTRICAL SYSTEM
Problem Cause Remedy
Battery will not hold a Low battery power. Clean and retighten.
charge.
Alternator belt loose or bad. Tighten or replace belt.
Loose or corroded terminals. Tighten or replace as required.
Alternator faulty. Repair or replace as required.

Low battery power. Internal battery short. Replace battery.
Short circuit in wiring. Repair as required.

Engine speed is not Speed control dial failed. Replace control dial.
controllable.
Throttle controller failed. Replace controller.
Speed control motor failed. Repair or replace as required.
Blown fuse. Replace fuse.
Wiring harness damaged. Repair or replace as required.
Connector failed. Repair or replace as required.

Power mode selector does Blown fuse. Replace fuse.
not work.
Power mode selector switch failed. Replace switch.
Connector failed. Replace connector.
e-EPOS controller failed. Repair or replace as required.
Troubleshooting OP000013
6-1
Working mode selector does Blown fuse. Replace fuse.
not work.
Working mode selector switch. Replace switch failed.
Connector failed. Replace connector.
e-EPOS controller failed. Repair or replace as required.
ENGINE
Starter does not operate. Low battery power. Charge battery.
Poor terminal contact. Clean and tighten connections.
Starter switch failed. Replace switch.
Starter relay failed. Replace relay.
Starter controller failed. Replace controller.
Wiring harness faulty. Replace harness.
Battery relay failed. Replace relay.

Starter engages, engine Fuel gelled in cold weather. Replace fuel.
does not start.
Fuel filters plugged. Replace filters.
Water or dirt in fuel system. Clean system and add new fuel.
Air in fuel system. Purge air from system.
Engine stop control failed. Contact your DOOSAN dealer.
Engine stop relay failed. Replace relay.

Engine starts, runs only at Engine oil viscosity incorrect. Change oil.
low speed or shuts down.
Clogged or dirty fuel injectors. Clean injectors.
6-2
Engine knocks, runs Low engine oil. Refill.
unevenly or surges.
Plugged air intake system. Clean system and replace filter.
Injection pump out of adjustment. Contact your DOOSAN dealer.
Plugged fuel filter. Replace fuel filter.
Water or dirt in fuel system. Clean system and add new fuel.

Engine has poor power. Plugged air intake system. Clean system and replace filter.

Engine speed control cable out
Readjust.
of adjustment.
Injection pump out of adjustment. Contact your DOOSAN dealer.
Valve backlash faulty. Adjust backlash.

Engine runs hot. Low coolant level. Add coolant.
Thermostat faulty. Replace thermostat.
Radiator cap faulty. Replace radiator cap.
Radiator core plugged. Clean radiator.
Oil cooler core plugged. Clean oil cooler.
Fan belt loose or damaged. Tighten or replace as required.
Temperature sensor faulty. Replace sensor.
HYDRAULIC SYSTEM
None of the controls Hydraulic pump failed. Contact your DOOSAN dealer.
function (loud noise from
pumps). Low hydraulic oil level. Add hydraulic oil as required.
Suction line plugged or damaged. Clean or replace as required.

None of the controls Pilot pump failure. Contact your DOOSAN dealer.
function (no noise from
pumps). Cut off solenoid valve failed. Replace solenoid.
Pilot cutoff switch is ON. Adjust pilot cutoff switch clearance.
6-3
All actuators have low Low hydraulic oil level. Add hydraulic oil as required.
power.
Suction filter clogged. Clean filter.
Hydraulic pumps faulty. Contact your DOOSAN dealer.
Main relief pressure too low. Contact your DOOSAN dealer.
Hydraulic pumps excavating. Bleed air from hydraulic pumps.

Only one or two actions Overload relief pressure too low. Reset pressure.
have little or no power.
Makeup check valve leaking. Clean or replace as required.
Control valve spool faulty. Replace valve spool.
Dirt in valve spool. Clean or replace as required.
Actuator failed. Repair or replace as required.
Cylinder seal failed. Repair or replace as required.
Cylinder rod damaged. Repair or replace as required.
Remote control valve failed. Replace control valve.
Wrong pilot line connection. Reconnect pilot lines.

Oil temperature too high. Oil cooler faulty. Contact your DOOSAN dealer.
Fan belt loose. Tighten fan belting as required.
SWING SYSTEM
No swinging motion. Swing brake valve faulty. Replace brake valve.
Hydraulic timer faulty. Replace timer.
Low brake release pressure. Adjust pressures.
Swing motor failed. Replace swing motor.
Remote control valve failed. Replace control valve.

Swing motion jerky. Swing gear worn. Replace swing gear.
Swing bearing damaged. Replace bearing.
Improper lubrication. Add grease.
6-4
TRAVEL SYSTEM
Travel motion does not Center joint leaking. Repair or replace as required.
function.
Parking brake will not release. Repair parking brake.
Travel motor failed. Repair or replace as required.
Remote control valve failed. Repair or replace as required.

Travel speed is too low. Track tension too high or too low. Adjust tension.
Damaged rollers or idlers. Repair or replace as required.
Track frame damaged. Repair as required.
Parking brake will not release. Repair parking brake.
6-5
6-6
OP000486
7Specification
STANDARD SPECIFICATION
SPECIFICATION
COMPONENT
METRIC ENGLISH
Bucket CECE 0.95 m3 1.24 yd3
capacity
PCSA 1.1 m3 1.44 yd3
Equipment weight 24.6 metric tons 27.1 tons
Engine Model DL06
Type Water cooled - 6 cylinders
Rated output 175 ps @1,900 rpm 173 hp @1,900 rpm
Maximum torque 78 kg•m @ 1,400 rpm 564 ft lb @ 1,400 rpm
Fuel tank capacity 410 liters 108 U.S. gal.
Hydraulic Type Axial piston
pump Discharging pressure 2 5,000 psi
350 kg/cm
Maximum discharge quantity 2 x 219 liters/min 2 x 57.9 U.S. gpm
Hydraulic oil Tank Level 150 liters 39.6 U.S. gal.
capacity System 240 liters 63.4 U.S. gal.
Performance Digging Bucket 16.1 metric tons 17.5 tons
capability Arm 12.1 metric tons 13.3 tons
Swing speed 10.0 rpm
High speed 5.2 km/h 3.2 MPH
Travel speed
Low speed 3.1 km/h 1.9 MPH
High speed 11 metric tons 12.2 tons
Traction force
Low speed 21.6 metric tons 23.8 tons
Gradeability 35˚ (70% slope)
Ground pressure 2 7.1 psi
0.5 kg/cm
Ground clearance 450 mm 17.7 in
Track shoe width 600 mm 23.6 in
Upper roller qty. 2 per side
Bottom roller qty. 10 per side
Specification OP000486
7-1
OVERALL DIMENSIONS
H A
I J B C
O G
F
N
M
K D
L E
FG007004
Figure 1
5.3 m (17.3 ft) BOOM 5.9 m (19.4 ft) BOOM

DIMENSION 2.0 m (6.6 ft) 2.5 m (8.2 ft) 2.5 m (8.2 ft) 3.0 m (9.8 ft) 3.5 m (11.5 ft)
ARM ARM ARM ARM ARM
9,555 mm 9,470 mm 10,100 mm 10,055 mm 10,080 mm
A
(31' 4") (31' 7") (33' 3") (33' 10") (33' 8")
B 2,995 mm (9' 3")
6,560 mm 6,475 mm 7,105 mm 7,060 mm 7,085 mm
C
(21' 2") (21' 5") (23' 1") (23' 7") (23' 5")
D 3,835 mm (12' 10")
E 4,625 mm (15' 8")
F 1,110 mm (3' 5")
3,410 mm 3,180 mm 3,183 mm 3,100 mm 3,290 mm
G
(11' 10") (10' 4") (10' 5") (10' 8") (10' 10")
H 2,710 mm (8' 11")
I 1,400 mm (4' 11")
J 1,310 mm (4' 11")
K 2,600 mm (8' 3")
L 3,200 mm (10' 11")
M 600 mm (1' 8")
N 450 mm (1' 9")
O 2,970 mm (9' 5")
7-2
WORKING RANGE
11
10
9
8
7
6
5
C
4
D
3
2
1
G.L 0
0 1 2 3 4 5 6 7 8 9 10 11
-1
-2
-3
-4 B
-5
-6
-7
-8
A
FG007005
Figure 2
5.3 m (17.3 ft) BOOM 5.9 m (19.4 ft) BOOM

DIM. 2.0 m (6.6 ft) 2.5 m (8.2 ft) 2.5 m (8.2 ft) 3.0 m (9.8 ft) 3.5 m (11.5 ft)
ARM ARM ARM ARM ARM
Max. digging 8,700 mm 9,070 mm 9,710 mm 10,195 mm 10,665 mm
A
radius (28' 6") (29' 9") (31' 10") (33' 5") (35' 0")
B
depth (17' 8") (19' 3") (20' 9") (22' 4") (24' 0")
C
height (28' 6") (28' 3") (30' 6") (31' 5") (32' 4")
Max. dump 5,990 mm 6,010 mm 6,645 mm 6,925 mm 7,160 mm
D
height (19' 8") (19' 9") (21' 10") (22' 9") (23' 6")
Min. digging 3,510 mm 3,580 mm 3,885 mm 3,845 mm 3,865 mm
E
radius (11' 6") (11' 9") (12' 9") (12' 6") (12' 8")
7-3
APPROXIMATE WEIGHT OF
WORKLOAD MATERIALS
IMPORTANT
Weights are approximations of estimated average
volume and mass. Exposure to rain, snow or ground
water; settling or compaction due to overhead weight
and chemical or industrial processing or changes due to
thermal or chemical transformations could all increase
value of weights listed in table.
LOW WEIGHT OR MEDIUM WEIGHT OR HIGH WEIGHT OR

DENSITY DENSITY DENSITY
MATERIAL 1,100 kg/m3 1,600 kg/m3 2,000 kg/m3
(1,850 lb/yd3), OR (2,700 lb/yd3), OR (3,370 lb/yd3), OR
LESS LESS LESS
401 kg/m3
Charcoal --------------------- ---------------------
(695 lb/yd3)
433 kg/m3
Coke, blast furnace size --------------------- ---------------------
(729 lb/yd3)
449 kg/m3
Coke, foundry size --------------------- ---------------------
(756 lb/yd3)
801 kg/m3
Coal, bituminous slack, piled --------------------- ---------------------
(1,350 lb/yd3)
881 kg/m3
Coal, bituminous r. of m., piled --------------------- ---------------------
(1,485 lb/yd3)
897 kg/m3
Coal, anthracite --------------------- ---------------------
(1,512 lb/yd3)
1,009 kg/m3
Clay, DRY, in broken lumps --------------------- ---------------------
(1,701 lb/yd3)
1,746 kg/m3
Clay, DAMP, natural bed --------------------- ---------------------
(2,943 lb/yd3)
1,506 kg/m3
Cement, Portland, DRY granular --------------------- ---------------------
(2,583 lb/yd3)
1,362 kg/m3
Cement, Portland, DRY clinkers --------------------- ---------------------
(2,295 lb/yd3)
1,522 kg/m3
Dolomite, crushed --------------------- ---------------------
(2,565 lb/yd3)
1,202 kg/m3
Earth, loamy, DRY, loose --------------------- ---------------------
(2,025 lb/yd3)
1,522 kg/m3
Earth, DRY, packed --------------------- ---------------------
(2,565 lb/yd3)
1,762 kg/m3
Earth, WET, muddy --------------------- ---------------------
(2,970 lb/yd3)
7-4
LOW WEIGHT OR MEDIUM WEIGHT OR HIGH WEIGHT OR
DENSITY DENSITY DENSITY
MATERIAL 1,100 kg/m3 1,600 kg/m3 2,000 kg/m3
(1,850 lb/yd3), OR (2,700 lb/yd3), OR (3,370 lb/yd3), OR
LESS LESS LESS
961 kg/m3
Gypsum, calcined, (heated, powder) --------------------- ---------------------
(1,620 lb/yd3)
1,522 kg/m3
Gypsum, crushed to 3 inch size --------------------- ---------------------
(2,565 lb/yd3)
1,810 kg/m3
Gravel, DRY, packed fragments --------------------- ---------------------
(3,051 lb/yd3)
1,922 kg/m3
Gravel, WET, packed fragments --------------------- ---------------------
(3,240 lb/yd3)
1,282 kg/m3
Limestone, graded above 2 --------------------- ---------------------
(2,160 lb/yd3)
Limestone, graded 1,362 kg/m3
--------------------- ---------------------
1-1/2 or 2 (2,295 lb/yd3)
1,522 kg/m3
Limestone, crushed --------------------- ---------------------
(2,565 lb/yd3)
1,602 kg/m3
Limestone, fine --------------------- ---------------------
(2,705 lb/yd3)
1,282 kg/m3
Phosphate, rock --------------------- ---------------------
(2,160 lb/yd3)
929 kg/m3
Salt --------------------- ---------------------
(1,566 lb/yd3)
529 kg/m3
Snow, light density --------------------- ---------------------
(891 lb/yd3)
1,522 kg/m3
Sand, DRY, loose --------------------- ---------------------
(2,565 lb/yd3)
1,922 kg/m3
Sand, WET, packed --------------------- ---------------------
(3,240 lb/yd3)
1,362 kg/m3
Shale, broken --------------------- ---------------------
(2,295 lb/yd3)
529 kg/m3
Sulphur, broken --------------------- ---------------------
(1,620 lb/yd3)
7-5
7-6
1INDEX
Numerics Cabin Work Light Switch 2-14
1,000 Hour / 6 Month Service 4-44 Ceiling Cover 2-63
10 Hour / Daily Service 4-14 Charge Warning Light 2-26
12,000 Hour / Six Year Service 4-58 Check and Confirmation After Stopping Engine
2,000 Hour / Yearly Service 4-51 3-12
250 Hour / Monthly Service 4-28 Cigarette Lighter 2-17
4,000 Hour / Biennial Service 4-57 Circuit Breaker 2-57
50 Hour / Weekly Service 4-25 Clock 2-25, 2-39
500 Hour / 3 Month Service 4-35 Cold Weather Hydraulic System Warm-up 3-10
Cold Weather Starting 3-6
Communication
A
Error Warning 2-30
Abnormal State Warning Symbols 2-31
Indicator 2-29
Adjust Valve Clearance 4-56
Component Locations 2-4
Air Intake System 4-22
Constant Speed Button 2-16
Outer Element of Air Cleaner 4-40
Coolant Temperature Warning Light 2-27
Replace Outer Air Cleaner Element 4-52
Cooling System
Alternator and Starter 4-56
Clean Radiator, Oil Cooler and Air Conditioner
Antifreeze Concentration Tables 4-76
Condenser Coil 4-39
Antivibration Shock Mounts 4-56
Engine 4-75
Ashtray 2-67
Engine Coolant Temperature Warning Light
Audio Control Panel 2-12
2-27
Auto Idle Mode 3-21
Oil Cooler Dust Net 4-20
Auto Idle Selector Button 2-35
Radiator Coolant 4-53
Auxiliary Mode Switch 2-11
Refill Cooling System 4-20
Cracks and Faulty Welds 4-23
B Cup Holder 2-69
Batteries 4-34 Cycle Time Tests 4-56
Battery 4-71
Box Door 2-70
D
Electrolyte Level 4-72
Description of Lubrication and Service Chart 4-10
Terminals 4-72
Digital Clock 2-25
Voltage 2-30
Display Selection 2-38
Bolt and Nut Inspection 4-60
Display Selector Button 2-37
Boom, Arm and Front Attachment Pins 4-25, 4-29 Door Side Latch 2-66
Boost Mode 3-22
Door Window Holder 2-69
Booster Button 2-19
Down Arrow Button 2-37
Booster Cable 3-7
Breaker Selection 2-47
Bucket 4-68 E
O-ring 4-69 Electrical System 4-71, 6-1
Teeth and Side Cutters 4-21 Engine 6-2
Tooth 4-68 Adjust Valve Clearance 4-56
Check and Adjust Engine 4-50
Check Warning Light 2-27
C
Coolant Temperature Gauge 2-24
Cabin Light 2-57
Coolant Temperature Warning Light 2-27
Cabin Storage Compartments 2-67 Cover 2-70
K1016584E Index
8-1
Emergency Stop Switch 2-11 Head Bolt Torques 4-56
Fan Belt 4-31 Headlight Switch 2-13
Head Bolt Torques 4-56 Heater and Air Conditioner 2-49
Oil and Filter 4-27, 4-36 Additional Operating Instruction 2-54
Oil Level 4-14 Control Panel 2-15, 2-50
Oil Pressure Warning Light 2-26 Filter 4-37, 4-48
Shutdown 3-11 Location of Controls and Vents 2-49
Speed 2-30 Memory Function of Used Mode 2-54
Speed Control Dial 2-10 Refrigerant 4-49
Start 3-4 System 4-59
Start and Stop 3-2 Horn Button 2-19
ESC Button 2-38 Hose Clamps 4-34
Excavator Rated Lift Capacity Tables 1-49 Hour Meter 2-26
Hydraulic System 6-3
F Flow Control 2-45
Fan Belt 4-27 Front Hydraulic Pump Pressure 2-31
Filter / Oil Info 2-40 General Venting 4-84
Filter State 2-31 Hydraulic Breaker 3-33
Flow Control 2-45 Hydraulic Hoses and Tubing 3-33
Flow Control Button 2-35 Oil and Filter 3-37
Front Operation 3-33
Bottom Window 2-65 Selection 3-33
End Attachments 4-34 Hydraulic Cylinders 4-83
Hydraulic Pump Pressure 2-31 Hydraulic Oil Exchange 4-54
Upper Windows 2-64 Hydraulic Oil Return Filter 4-33, 4-45
Windows 2-64 Hydraulic Oil Tank 4-15
Fuel Hydraulic Oil Temperature Gauge 2-25
Filter 4-42 Leaks in the Hydraulic System 4-16
Gauge 2-24 Main System Pump 4-83
Heater Switch 2-18 Oil Exchange 4-54
Level 4-16 Rear Hydraulic Pump Pressure 2-31
System 4-43 Swing Motor 4-84
Transfer Pump 4-77 Warm-up 3-9
Tank Drain Valve 4-27
Transfer Pump 4-77 I
Fuse Indicator
Boxes 2-58, 4-73 Communication Indicator 2-29
Fuses 4-72 Indicator Lights
Fusible Link 2-58 Charge Warning Light 2-26
Identification 4-74 Coolant Temperature Warning Light 2-27
Engine Check Warning 2-27
G Engine Oil Pressure Warning Light 2-26
Gauges Preheating Indicator Light 2-28
Engine Coolant Temperature Gauge 2-24 Work Light 2-28
Fuel Gauge 2-24 Inspecting Engine Before Starting 3-2
Hour Meter 2-26 Inspection, Maintenance and Adjustment 4-1
Hydraulic Oil Temperature 2-25 Instrument Panel 2-20, 2-22
Multifunction Gauge 2-25, 2-29 Intermittent Speed Button 2-16
General Venting 4-84
L
H Language 2-39
Handling a New Excavator 3-1 Leaks in the Fuel System 4-17
Handling of Accumulator 4-80 Leaks in the Hydraulic System 4-16
Hanger 2-68, 2-69 Levers
K1016584E Index
8-2
Adjusting Reclining 2-60 Overload Alarm Selection 2-48
Adjusting the Seat Forward 2-59 Overload Warning Switch (Optional) 2-18
Adjusting the Seat's Angle 2-59
Angle Adjustment of Armrest 2-60 P
Safety Lever 2-20 Panels
Lifting 3-41 Air Conditioner Control Panel 2-15
Lifting With Sling 5-5 Audio Control 2-12
Lights Heater and Air Conditioner 2-49
Cabin 2-57 Heater and Air Conditioner Control Panel 2-50
Loading and Unloading 5-1 Instrument 2-20
Locations of Safety Labels 1-5 Instrument Panel 2-22
Long Term Storage 4-85 Wiper Switch 2-15
Lubrication and filters 3-2 Parking Excavator 3-31
Lubrication and Service Chart 4-8 Password
Activated 2-23
M Set Password 2-43
Magnetic Clutch 4-59 Password Activated 2-23
Main Menu 2-36 Photo Sensor 2-21
Maintenance in Special Conditions 4-86 Pilot Cutoff Switch 2-57
Maintenance Intervals 4-12 Pilot Filter 4-33, 4-46
Miscellaneous Access Doors 2-70 Pins and Bushings 4-34
Mode Selection 3-20 Power Boost Selection 2-47
Mode Selector Buttons 2-34 Power Mode 3-20
Multifunction Gauge 2-25, 2-29 Power Mode Selector Button 2-34
Power Socket 2-17
N Preheating Light 2-28
Nuts and Bolts 4-34 Preliminary Work Machine Setup for Maintenance
4-4
Preventive Maintenance 4-1
O Pump Pressure
Oil Cooler Dust Net 4-20 Front Pump 2-31
Oil Level of Travel Reducer 4-32 Rear Pump 2-31
Opening the Window 2-64
Operating
Controls 2-1 Q
Instructions 3-20 Quick Clamp Operation Selection 2-48
Precautions 3-26 Quick Clamp Switch (Optional) 2-11
Techniques 3-41
Operation 3-1 R
Operation In Radiator Coolant 4-53
Extreme Cold 3-43 Rear Hydraulic Pump Pressure 2-31
Extreme Heat 3-44 Refill Cooling System 4-20
High Altitudes 3-46 Rotating Buttons 2-19
Rainy or Humid Conditions 3-45
Salt Water Areas 3-46 S
Operation of All Switches 4-23 Safety 1-1
Operation Selection Display 2-47 Safety Lever 2-20, 3-13
Operation Under Unusual Conditions 3-43 Safety Precautions 4-3
Operational Checks Before Starting Engine 3-3 Seat 2-59
Operational Controls and Panels 2-8 Seat Adjustment
Operator's Area 2-6 Adjusting Reclining 2-60
Operator's Compartment Light 2-57 Adjusting the Seat Forward 2-59
Outer Air Cleaner Element 4-52 Adjusting the Seat's Angle 2-59
Outer Element of Air Cleaner 4-40 Adjustment of Lumbar Support 2-60
Overall Dimensions 7-2
K1016584E Index
8-3
Air Suspension Seat 2-62 Cabin Work Light Switch 2-14
Angle Adjustment of Armrest 2-60 Cigar Lighter 2-17
Headrest 2-60 Constant Speed Button 2-16
Left ad Right Control Stand Location 2-61 Display Selector Button 2-37
Left and Right Control Stand Elevation Height Down Arrow Button 2-37
2-61 Engine Emergency Stop 2-11
Seat Belt 2-60, 4-22 Engine Speed Control 3-20
Seat Warmer Switch (Optional) 2-18 Engine Speed Control Dial 2-10
Selection Button 2-37 ESC Button 2-38
Selection of Flow Control Button 2-35
Breaker 2-47 Fuel Heater 2-18
Overload Alarm 2-48 Headlight Switch 2-13
Power Boost Selection 2-47 Horn Button 2-19
Quick Clamp Operation 2-48 Intermittent Speed Button 2-16
Shear 2-47 Overload Warning (Optional) 2-18
Serial Numbers 4-2 Pilot Cutoff Switch 2-57
Set Password 2-43 Power Mode Selector Button 2-34
Setting Clock 2-39 Power Socket 2-17
Shear Buttons 2-20 Quick Clamp (Optional) 2-11
Shear Selection 2-47 Rotating Buttons 2-19
Shutdown Seat Warmer (Optional) 2-18
Check and Confirmation After Stopping Engine Selection Button 2-37
3-12 Shear Buttons 2-20
Engine Shutdown 3-11 Starter Switch 2-10
Parking Excavator 3-31 Travel Speed Selector Switch 2-13
Side Door 2-70 Travel/Swing Alarm (Optional) 2-17
Specification 7-1 Trenching Mode Selector Button 2-35
Standard Specification 7-1 Up Arrow Button 2-36
Starter Switch 2-10 Warning Light 2-14
Starting Engine Using a Booster Battery 3-7 Washer Button 2-16
Start-up Wiper Switch (Lower) 2-15
Cold Weather Hydraulic System Warm-up 3-10 Symbols
Cold Weather Starting 3-6 Air Cleaner Clogged Warning 2-33
Engine Start 3-4 Hydraulic Oil Overheat Warning 2-32
Hydraulic System Warm-up 3-9 Overload Warning (Optional) 2-34
Inspection Before Starting Engine 3-2 Pilot Filter Clogged Warning 2-32
Operational Checks Before Starting Engine 3-3 Return Filter Clogged Warning 2-33
Starting Engine Using a Booster Battery 3-7
Stereo 2-55 T
Audio Control Panel 2-12 Table of Recommended Lubricants 4-6
Structural Damage 4-56 Towing Procedure 3-32
Suction Strainer 4-54 Track Assemblies 4-27
Sun Visor 2-68 Track Tension 4-81
Swing Transportation 5-1
Bearing 4-26 Travel 3-14
Gear and Pinion 4-35 Control Lever Operation 3-16
Motor 4-84 Instructions 3-17
Reduction Device 4-19, 4-28, 4-44, 4-51 Reduction Device 4-32, 4-33, 4-47
System 6-4 Speed Selector Switch 2-13
Switches System 6-5
Auto Idle Selector Button 2-35 Travel/Swing Alarm Switch (Optional) 2-17
Automatic Travel Speed Control 3-14 Trenching Mode Selector Button 2-35
Auxiliary Mode 2-11 Troubleshooting 6-1
Booster Button 2-19
K1016584E Index
8-4
U Weight of Workload Materials 7-4
Unloading and Loading 5-1 Window Washer Liquid 4-21
Up Arrow Button 2-36 Windows
Door Window Holder 2-69
Front 2-64
V
Front Bottom 2-65
Venting and Priming Hydraulic System 4-83 Front Upper 2-64
General Venting 4-84
Opening 2-64
Hydraulic Cylinders 4-83
Sun Visor 2-68
Main System Pump 4-83
Wiper Switch (Lower) 2-15
Swing Motor 4-84
Wiper Switch Panel 2-15
Work Levers (Joysticks) (ISO Style) 3-23
W Work Light Indicator Light 2-28
Warning Light Switch 2-14 Work Mode 3-21
Washer Button 2-16 Working Range 7-3
Water Separator 4-18
K1016584E Index
8-5

DX255LC: Doosan

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DX255LC

Operation and Maintenance Manual

K1016584E Operation and Maintenance Manual Copyright Doosan 2006

Operating Controls ....................................................................2-1

K1016584E Table of Contents

Inspection, Maintenance and Adjustment...............................4-1

K1016584E Table of Contents

K1016584E Table of Contents

Table of Contents K1016584E

Please respect the importance of taking responsibility for

Learn the Signal Words Used with the

There are several specific warning signs on this machine.

AVOID DEATH OR SERIOUS INJURY. - READ AND UNDERSTAND

Never get in under the machine while it is being jacked up

2. Warnings for High Voltage

When raising window,

Falling window can cause

4. Warnings for a High-pressure

6. Warnings for Leaving Operator's

Sudden and unwanted machine

Always make sure when leaving

Battery fumes can explode. Keep sparks and flames away

8. Warnings for High Temperature

HOT OIL CAN CAUSE INJURY OR

To prevent hot oil from spurting out:

HOT COOLANT CAN CAUSE INJURY

10. Warnings for Handling an

Keep away from flame.

Rotating par ts can cause

12. Warning Tag - Used When Inspection

14. Caution for Hood (190-00522)

16. Warnings for Front Attachments

To lift safely while in Digging Mode, the following items must

Always engage the "Digging Mode" control on the Instrument

Clothing and Personal Protective Items

Vibration Level Information

Recommendations for Limiting

Mounting and Dismounting

Precautions When Handling Fluids at

To prevent hot coolant from spurting out, shut down engine,

Injury from Work Equipment

Fire Extinguisher and First Aid Kit

Protection from Falling or Flying Objects

Never attempt to alter or modify any type of protective

Work Site Precautions

Minimum levels of insurance coverage, work permits or

Checks Before Starting Engine

Before Operating Machine

When Swinging or Changing Direction

Fold in work equipment so that the outer end of the boom

When using the machine, to prevent accidents caused by

Precautions for Operation

Voltage Minimum Safe Distance

Use these minimum distances as a guideline only.

Protecting Cabin from Falling Object

Operate Carefully on Snow, Ice and in

In addition, lower the bucket as far as possible, keep it

Never Let Anyone Ride on Attachment

Clean Before Inspection or Maintenance