DRD'S' 920937-9407 02-03

00 General
10 Chassis and cab
Technical 20 Electrical system

Handbook
ContChamp 30 Engine
DRD
S Transmission,
40 drive axle, brakes
This Handbook deals with the design
and maintenance of Kalmar machines,
type DRD-S for the handling of contai-
ners.
50
In addition, it gives details of trouble-
shooting and the most common
corrective maintenance.
Operation and other matters that are

primarily of interest to the operator are
included it the Instruction Manual.
60 Steering axle
Kalmar Industries AB
This handbook applies to
machines from and including
machine number T34107.0784 as
well as T34107.0621 and 70 Hydraulic system
T34107.0769, see next page.
80 Boom and attachment

We reserve the right to modify
our design and material specifi-
cations without prior notice.
Publ. Nr 920 937 9407 02-03

AdEra Dokument AB, Växjö 2002
90 Periodic supervision
This Handbook applies to machines from and including machine number
T34107.0784 as well as T34107.0621 and T34107.0769
These machines are of a new design that entails the following differences from older machines. The chang-
es do not apply to machines with combi-attachments or top-lift with pileslope.
1. The electrical system is equipped with a separate KDU for the top-lift, component number 791. The KDU
communicates with ECU 2 via a CAN bus.
2. The main valve of the top-lift is fed by a variable hydraulic pump.
The main valve is common for all of the top-lift’s functions.
3. The length adjustment of the top-lift is manoeuvred by means of a hydraulic motor and chain.
4. The top-lift rotation brake is manoeuvred completely hydraulically.
9407
ContChamp DRD-S 02-03
Technical Handbook Contents Group 00 P. 1
Contents
Group 00
Safety regulations..................................................................... 2
General...................................................................................... 6
Design – Overview .............................................................. 6
Component units ................................................................ 7
Supplementary books ......................................................... 9
Replacement system – Spare parts ................................... 9
Tools ................................................................................... 9
Tightening torques.............................................................. 10
System of units ................................................................. 12
9407
ContChamp DRD-S Safety regulations 02-03
Technical Handbook Group 00 P. 2
It is important that you read the instruction Safety regulations aimed at reducing the
manual. risk of personal injury and damage to
Incorrect handling can lead to personal injury or dam- loads or other property.
age to products and/or property. Therefore, read the in-
struction book very carefully before operating the truck. Intended of use
The instruction manual contains important information z The truck may only be used for the purpose for
about your Kalmar truck, about the operation of the which it was intended, namely, to lift and transport
truck, about safety during operation and about the goods, the weight of which does not exceed the
truck's daily maintenance. In addition, you will find use- maximum permitted load capacity of the truck.
ful information that will make operations easier for you z The truck may not, without specific permission
in your daily work. from Kalmar, be modified or re-built so that its func-
The instruction manual must always be kept in the ma- tion or performance is altered.
chine. If the manual should be lost, a replacement must z The truck may not be driven on public highways if
be immediately obtained. Never use a machine with a it has not been adapted to comply with national
missing instruction manual. road safety regulations.
Ask your foreman/group leader if there is anything in Operator requirements
the manual that you do not understand or if you feel that z The truck may only be driven by operators who
information is missing in any area. have been specially trained and who have the
company's authority to do so.
The symbol is used on our products in certain z Laws and other regulations relating to driving li-
cases and then refers to important information con- cence, operator ID, log book, etc., must be fol-
tained in the instruction manual. Make sure that warn- lowed at all times.
ing and information symbols are always clearly visible z The operator must be aware of and follow all local
and legible. Replace symbols that have been damaged safety regulations.
or painted over.
z It is always the responsibility of the operator to en-
In this instruction manual warnings are inserted that sure that the truck has approved fire extinguishing
apply to your own safety. Warnings point out the risk of equipment in accordance with currently applicable
accident that can cause personal injury. regulations.
Operation of the truck is prohibited:
z If any of the fitted safety equipment, such as rear
WARNING! view mirrors, headlights, reversing alarm (option-
al), does not function correctly.
Warns of the risk of serious personal injury, pos- z If there is a fault with the brakes, steering or lift
sible death and/or serious damage to product or equipment.
property if the regulations are not followed.
z If it has been repaired, modified or adjusted with-
out the approval of the work supervisor.
For technical warnings, that point out the risk of break z If the truck is fitted with tyres not approved by
down, the word IMPORTANT is used: Kalmar.
IMPORTANT! Continued on next page

Is used to draw attention to such occurrences
that can cause damage to the product or
property.
For information that facilitates the working process or

handling, N.B. is used:
N.B. Draws attention to useful information that

helps the working process.
Emergency exit
If the doors should not open in an emergency, open the
rear window for emergency exit.
A rear window that can be opened is standard on ma- KL749
chines with hydraulically moveable cab. Optional on

other machines.
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Continued from previous page must be emptied into the tank, with the help of the
Operating regulations special accumulator evacuation valve.
z Before starting, make sure that the cab is locked z Handle batteries and junction boxes with great
care. The batteries must always be protected over
in the rear-most position by means of the latches, the poles and connections.
one on each side. The latches must be secured
with spring pins. (Applies to manually moveable z Always rectify any damage or wear and tear that
cabs). can risk personal safety or that can affect the func-
tions of the truck or its service life.
z Before starting, always check to ensure that no-
body is in the way of the truck or its equipment. z Avoid touching oils and greases. Avoid inhaling
exhaust and oil fumes.
z The operator must always face the direction of op-
eration and take particular care in areas where z Always use steps and handrails when entering or
persons or other vehicles are likely to appear in leaving the machine - Never jump!
the vicinity. If visibility is limited by the load, the op- To avoid the risk of slipping, tread only on anti-slip
erator should operate the truck in reverse. surfaces. If the anti-slip protection has become
z It is prohibited to walk or stand underneath raised worn, loose or in any way less effective, it should
be replaced.
forks or other equipment, whether they are loaded
or not. z Welding painted steel produces poisonous gas-
ses. Paint should therefore be stripped before
z It is prohibited to transport passengers on the welding, good ventilation ensured and/or face
truck outside the cab or on the load. Passengers mask with filter used.
may be transported inside the cab only on condi-
tion that it is equipped with a fixed passenger z Mobile phones used in the cab must always have
seat. fixed connections to the machine’s electrical sys-
tem, with a fixed antenna outside the machine,
z It is prohibited to lift people if the truck is not mounted in accordance with the manufacturer’s
equipped with an approved lift cage. instructions. This will avoid interference with the
z It is prohibited to exceed the load capacity of the machine’s important electronic functions.
truck. See capacity plate and loading diagram.
Operating with attachments
z It is prohibited to transport loads in the raised po-
sition as this entails a risk of the truck tipping. All z The operator must always take the effect of the
transportation shall take place with the load in the wind into account when handling containers.
transport position. Avoid lifting with a wind strength in excess of 12
m/s (27 mph/40 feet per second).
z The operator must adapt the speed of the truck to
the character of the load, conditions of visibility, z Always drive carefully so as to avoid attachments
the character of the roadway/surface, etc. colliding with pillars, cables, etc.
z The operator shall avoid powerful acceleration z Carefully study the "Lift methods" section of the
and braking when turning. In addition, the opera- instruction manual.
tor shall always moderate the speed of the truck z The tensile strength of the top pane can be seri-
when turning so as to avoid the risk of lateral skid- ously weakened by exposure to elements that
ding or tipping. contain: Aromatic hydrocarbon, ketone, esters or
z The operator shall take particular care when oper- chlorinated hydrocarbon.
ating in the vicinity of electrical power lines, via- Regularly check the surface condition of the top
ducts, quay-sides, ramps, gates/doors etc. pane and clean only with screen wash or other
mild cleaning fluid. After cleaning, rinse thorough-
z Safety belts must always be worn, if fitted. In the ly with warm water. It is prohibited to modify or in
event of the truck tipping, always remain in the cab any other way make alterations to the top pane.
and grip the steering wheel securely. Never try to Immediately replace damaged top panes that
jump out of the cab. show signs of cracking or scratching.
z The parking brake can also be used as an EMER-
GENCY BRAKE. However, having been used for
emergency braking, the brake linings must be
checked and replaced if necessary. If the parking
brake has been mechanically released, it must
always be reset in order for the truck to regain the CE marking
parking brake function. All trucks and equipment (though not thoses fitted on
Interrupted operation, parking the truck or intended as spare parts) supplied from Ka-
lmar are CE marked, which indicates that they comply
z Always check that the gear lever is in the neutral with the requirements of the EU Machine Safety Direc-
position before turning the ignition key to restart or tive. In addition, each truck has a so called, “EU Dec-
to reset an emergency stop. laration of Conformity” which is the legal proof that the
z Never leave the operator's cab without applying truck complies with the “health and safety” require-
the parking brake (ON position). ments laid down in the Machine Safety Directive, the
z Always remove the ignition key if the truck is to be EMC directive (electro-magnetic compatibility) and the
left unattended. LVD directive (electrical equipment).
Other important points to remember
z The truck's hydraulic system includes high pres- Vibration standard
sure hydraulic accumulators. Always be extremely The truck complies with and is below the limits for vi-
careful when working with the hydraulic system
and avoid being unnecessarily close to the hy- bration standard EN 13059.
draulic equipment, lines and hoses. Before work-
ing on the hydraulic system, the accumulators
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Safety regulations
z Only authorized and qualified personnel may z Never run hands or fingers along any tubes,
work with the safety system. (ECS-system) pipes or hoses whilst investigating for possible
z If the overload safety system override function leaks as some of these lines (diesel fuel, hydrau-
has been used, there is a risk of forward tipping. lic, steering, etc.) operate at extremely high
The truck should be operated with extreme care pressures and even the most minute of leaks
to prevent accidents. can cause oil or fluid to penetrate the skin.
z Great care must be exercised at all times when z Under no circumstances may compressed air be
driving the machine. Always remember the great used to remove a hydraulic piston from its cylin-
height and width of the machine so that collision der.
with beams, cables etc. is avoided z Always attend to damage and wear that may be
z It is prohibited to start lifting a container if the of significance to the performance and useful life
warning light TWIST-LOCK UNLOCKED (red) is of the truck or to the safety of the personnel.
lit or if any of the warning lights TWIST-LOCK z Follow the safety rules whenever carrying out
LOCKED (green) or ALIGNMENT (orange) are service work on the air conditioner. The refriger-
extinguished. N.B. the ALIGNMENT warning ant is injurious to the skin and eyes. Only author-
light goes out once the lift has begun. ized service personnel may repair the system.
z If the safety system warning lamps are not func- z The truck’s hydraulic system includes high pres-
tioning, the system must be immediately re- sure hydraulic accumulators. Before working on
paired. To use a truck with faulty warning lamps the hydraulic system, the accumulators must be
is a great safety risk. emptied into the tank, with the help of the special
z Do not drive the truck with load raised high accumulator evacuation valve. Also valve B for
above the ground, since the truck may overturn. emergency pressure to servo system must be
The transport of heavy loads must be carried out opened.
with the load as close to the truck as possible, z Never carry out any service work on the boom or
i.e. with the boom retracted and lowered as far attachment when the engine is running.
as possible without obstructing vision, see pic-
ture below.
KL591
KL1103
Transport position A. Quick evacuation valve, accumulators

B. Valve for emergency pressure to servo system
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Safety instructions for working with tyres
z Tyre changing can be dangerous and should only be z Rim inspection

carried out by specially trained – Check rim components periodically for fatigue
personnel using proper tools and procedures. Fail- cracks. Replace all cracked, badly worn, dam-
ure to comply with these procedures may result in aged and severely rusted components.
faulty positioning of the tyre and/or rim and cause the – Always select the correct tyre size and construc-
assembly to burst with explosive force sufficient to tion matching the manufacturer’s rim or wheel rat-
cause physical injury or death. Never fit or use dam- ing and size.
aged tyres or rims. – Do not use over-size tyres, too large for the rims,
z Never attempt to weld on an inflated tyre/rim assem- e.g. 14.5 inch tyres with 14 inch rims or 16.5 inch
bly. tyres with 16 inch rims.
– Never use damaged, worn or corroded rims/
z Never let anyone assemble or disassemble tyres wheels or fitting hardware. Always verify that the
without proper training. rim is in a serviceable conditioning.
z Never run the truck on one tyre of a dual assembly. – Always clean and repaint lightly rusted rims.
The load capacity of a single tyre is then dangerous- – Never use a rim/wheel component that can not be
ly exceeded and operation in this manner may dam- identified. Check rim parts against multi-
age the rim. piece rim/wheel matching charts.
z Deflation and dismantling z Assembly and inflation

– Always block the tyre and wheel on the opposite – It is important that the inflation equipment is
side of the vehicle before you place the jack in po- equipped with a water separator to remove mois-
sition. Always crib up the blocks to prevent the ture from the air line in order to prevent corrosion.
jack from slipping. Check the separator periodically to ensure that it
– Always check the tyre/rim assembly for proper is working properly.
component seating prior to removal from the – Make sure that the lockring is in its right position.
truck. – Never mix different manufacturer’s parts since this
– Always deflate the tyre by removing the valve core is potentially dangerous. Always check manufac-
prior to removing the complete assembly from the turer for approval.
truck or dismantling any of the component. Before – Never seat rings with hammering while the tyre is
loosening mounting bolts, run a wire through the inflated. Do not hammer on an inflated or partially
valve stem to ensure that it is not blocked. Ice or inflated tyre/rim assembly.
dirt can prevent all the air from escaping. Deflate – Always double check to ensure that the rim as-
and remove valve cores from both tyres of a dual semblies have been correctly assembled and that
assembly. securing studs and nuts are tightened to the cor-
– Never position body in front of the rim during de- rect torque setting.
flation. – Never inflate tyres before all side and lockrings
– Always follow assembly and dismantling proce- are in place. Check components for proper as-
dures outlined in the manufacturer’s instruction sembly after pumping to approximately 5 psi (=34
manual, or other reconized industry instruction kPa, =0.34 bar)
manuals. Use proper rubber lubricant. – When adding air to a tyre on an industrial truck,
– Never use a steel hammer to assembling or dis- use a clip-on chuck and stay out of the danger ar-
mantling rim components – use a lead, brass or ea. If the tyres has been run flat then the rim must
plastic type mallets. The correct tools are availa- be dismantled and all parts inspected for damage.
ble through rim/wheel distributors. – Under-inflated tyres have a serious effect on the
– remove bead seat band slowly to prevent acci- stability of the truck and reduces the safe load
dents. support the band with your thigh and roll it handling capacity. Always maintain tyres at the
slowly to the ground in order to protect back and correct inflation pressures. Check inflation pres-
toes. sure daily. Do not over-inflate.
– Disassembly tools apply pressure to rim flanges – Inspect tyres regulary – every day if possible.
to unseat tyre beads. Keep your fingers clear. Look for and remove broken glass, torn pieces of
Slant disassembly tool about 10 degrees to keep tread, embedded metal chips etc. Inspect for une-
it firmly in place. Always stand to one side when ven or rapid tread wear, usually caused by me-
applying hydraulic pressure. Should the tool slip chanical irregularities, such as brakes out of
off, it may cause fatal injury. adjustment or excessive toe-in and toe-out. If dis-
covered, correct the irregularity immediately.
z When installing and tightening trail wheel bolts, ob-
serve the following:
– Ensure that trail wheel or hub mounting surfaces
and trail wheel fastener mounting surfaces are
clean and free from paint and grease.
– Tighten bolts to specified torque settings. use
staggered sequence; i.e. top bolt, bottom bolt etc.
9407
ContChamp DRD-S General 02-03
Design – Overview
Kalmar DRD420–450 model S diesel trucks are of sturdy design
for particularly heavy duty handling of 20-40' loaded containers.
They are built around a chassis which has high strength and tor-
sional stiffness and an extremely low centre of gravity.
The operator’s cab is provided with vibration isolation and sound
insulation and offers excellent all-round visibility.
There are many adjustments that can be made to the operator's
driving position. The position of the seat, back support and firm-
ness of the driving seat can be adjusted in a number of ways.
The trucks are equipped with a sliding cab. This puts the operator
in an exceptional position to superwise the top lift attachment and
offers excellent accessibility to the transmission and hydraulic
pumps. The engine is easily accessible through a removable run-
ning board.
To special order, the trucks are equipped with hydraulically pow-
ered sliding cab.
DRD420-60S5
KL586C
DRD420-65S5 with 20-40’ adjustable top lift

9407
The Volvo six-cylinder turbocharged engine, combined with a

four-speed gearbox with torque converter, provides smooth
power whenever needed.
The drive axle with hub reduction, oil-cooled hydraulic brake sys-
tem and pendulum-mounted steered axle with double-acting
steering cylinder satisfy very strict demands on strength and mo-
bility when travelling on irregular surfaces.
The hydraulic system is reliable and has high performance.
Component units
z Sound-insulated operator’s cab with excellent all-round visibil-
ity. The non-slip, substantial steps provide convenient access
to the cab. As an optional extra, a hydraulically movable cab
is available.
z ECS-system which controls the electric servo circuits and also
overload protection system. (With electronic balance, module
60 or 52, the loading conditions are indicated on a display on
the ECS-terminal in the operator’s cab.)
z Engine - Volvo TWD1031VE/TWD1231VE six-cylinder, four-
stroke, turbocharged diesel engine with direct injection and
thermostatically controlled water cooling.
The engine is equipped with:

– Injection pump with centrifugal governor that compensates
for load variations.
– Smoke limiter for reduced free acceleration and full load
smoke.
– Alternator.
z Gearbox with torque converter

– Constant-mesh gearbox changes by means of hydraulically
activated clutches which are electrically operated.
– Torque converter, which is a hydraulic coupling that ampli-
fies the output torque on an increase in load.Torque con-
version takes place smoothly and steplessly throughout the
engine speed range.
– Oil cooler connected to the engine cooling system for cool-
ing the oil in the gearbox and torque converter.
– Oil pump which supplies oil under pressure to the gearbox
and torque converter.
– Full-flow oil filter for effective cleaning of the gearbox oil.
z Drive axle with two-stage reduction - in the differential and the

hub reductions.
– Hydraulic, oil cooled disk brakes – wet disk brakes – for the
foot brake.
– Disc type parking brake applied by sturdy springs and re-
leased by hydraulic oil pressure.
9407
z Hydraulic system, that occurs in two versions:

1. With common tank for all hydraulic and brake circuits.
– a double variable hydraulic pump, feeds Lift 1, Extension 1,
hydraulic servo, steering system
attachment functions
– a fixed, wing type pump for the feeding of the brake system
– hydraulic fluid cooler for the brake system cooling circuit
2. With a separate tank for the working hydraulics and a separa-
te tank for the brake circuit.
hydraulic servo, steering system
attachment functions
– a fixed, wing type pump for the feeding of the brake system
– a hydraulic fluid cooler for the brake system cooling circuit
– a fixed, wing type pump for the circulation of the main tank’s
hydraulic fluid through a hydraulic fluid cooler
– hydraulic fluid cooler for the main tank
z Main valves for controlling the main hydraulics. The valves are
controlled by an electro-hydraulic servo system from the cab.
An electro-hydraulic servo system is available as an option.
z High pressure filters for effective cleaning of the hydraulic fluid
before it is returned to the tank.
z Priority valve giving priority to the steering system when re-
quired.
z Steering valve (Orbitrol) - flow-control valve which supplies hy-
draulic fluid to the steering cylinder.
z A hydraulic oil cooler with electrically powered fan
z Steered axle with pendulum mounting and double-acting

steering cylinder.
z Lift cylinders equipped with blocking valves, which eliminate
any undesirable sinking of the load. A regeneration system
gives high lifting speed at no load conditions.
z Boom of a slender, high-tensile steel construction. The boom
is pivot-mounted and comprises a fixed and a telescope sec-
tion manoeuvred by means of a double-acting extension cyl-
inder. The extension system is equipped with regeneration
system for quick boom-out speed at no-load conditions.
z Top-lift attachment, adjustable for handling 20 and 40 foot
containers.
9407
Supplementary books
In addition to the Instruction Manual and the Technical Hand-
book, the following books are delivered with every truck.
Spare parts catalogue

Instruction Manual for Volvo Industrial engines
Replacement system - Spare parts

Kalmar operates a system of replacement parts, repair kits and
gasket sets covering most of the vital components of the truck.
For the contents of these kits, see the Spare parts catalogue.
Tools
Kalmar offers a wide range of tools for truck maintenance work.
For further information, please contact Kalmar's service depart-
ment.
9407
Tightening torques
(According to Kalmar K Standards 20060.0001)
The tightening torques are applicable to steel bolts and nuts tight-
ened with a torque wrench under the following conditions:
Surface treatment
Condition Lubriation
Bolt Nut
1 untreated untreated oiled
bright galvanised untreated
2 bright galvanised bright galvanised dry or oiled
bright galvanised bright galvanised
3 hot-dip galvanised bright galvanised dry or oiled
The values specified inTable 1 are applicable to nut-and-bolt

joints, but can also be used for bolts fitted into tapped holes. How-
ever, in the latter case, the preloading force will be somewhat low-
er, depending on its depth of engagement.
When tightening by machine, the torque specified in Table 1
should be reduced by approx. 5%, due to the increased scatter
and to prevent the bolt from being tightened beyond its yield
point.
Quality 8,8 10,9 12,9

Tightening torque, Nm
Condition
Thread
M fin 1 2 3 1 1
M8×1 27 24 30 39 46
M10×1,25 54 48 61 76 91
M12×1,25 96 85 108 135 162
M16×1,5 230 205 260 323 388
M18×1,5 330 294 373 466 559
M20×1,5 460 409 520 647 777
M24×2 786 700 888 1100 1330
M30×2 2660 1388 1763 2200 2640
M36×3 1560 2367 3005 3730 4480
9407
To reduce the risk of settlement of the material and the

associated reduction in the preloading force if the hardness of the
surface supporting the bolt head or nut is lower than 200 HB, a
washer should be fitted under the bolt head and nut. This is not
applicable if flanged bolts or flanged nuts are used.
When tightening is carried out, the specified torque should be ap-
plied without pause, to ensure that the torque wrench will not be
tripped by the static friction before the joint has been tightened to
the specified torque.
Quality 8,8 10,9 12,9

Condition
Thread
M 1 2 3 1 1
4 3,2 2,9 3,6 4,6 5,5
5 6,4 5,7 7,2 9,1 11
6 11 9,8 12,5 16 19
8 26 24 30 38 45
10 52 47 59 74 89
12 91 81 103 128 154
16 220 198 250 313 375
20 430 386 49 620 732
24 750 668 848 1050 1270
30 1480 1317 1672 2080 2500
Quality 8,8 10,9 12,9

Condition
Thread
UNC 1 2 3 1 1
1/4 12,5 11,1 14,1 17,6 20
5/16 25 22,3 28,3 35 42
3/8 44 39 50 62 73
7/16 70 62 79 100 118
1/2 107 95 121 151 178
9/16 153 136 173 216 255
5/8 210 187 237 298 353
3/4 370 390 418 524 619
7/8 594 528 671 839 990
1 889 791 1005 1260 1480

1 1/8 1260 1120 1424 1780 2100
1 1/4 1760 1565 1990 2490 2940
1 3/8 2320 2065 2620 3280 3870
1 1/2 3060 2720 3455 4320 5100
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Quality 8,8 10,9 12,9

Condition
Thread
UNF 1 2 3 1 1
1/4 13 11 14 19 22
5/16 26 23 29 37 44
3/8 47 42 53 67 79
7/16 75 66 85 107 126
1/2 114 101 128 162 191
9/16 164 145 185 231 273
5/8 227 202 256 321 379
3/4 396 352 447 559 661
7/8 629 560 710 889 1050
1 937 834 1058 1320 1560

1 1/8 1350 1200 1525 1900 2250
1 1/4 1860 1655 2100 2630 3110
1 3/8 2500 2225 2825 3530 4170
1 1/2 3260 2900 3680 4610 5450
System of units
The SI system of units is employed in this handbook:
The conversion factors are as follows:
Pressure
megapascal bar Kilogram-force per Pound-force
square centimetre, per square
kpf/cm² inch,
Atmosphere, at psi
1 10 10,2 145
0,1 1 1,02 14.5
0,098 0,98 1 14.2
Torque
Newton- Kilogram force-metre Pound-force foot
meter kgf m lbf ft
Nm
1 0,102 0.74
9,81 1 7.23
Power
Kilowatt Horsepower (metric) Horsepower

kW hp hp
1 1,36 1.34
0,735 1 0.986
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Group 10
Chassis and cab
Specification .............................................................................. 2
Chassis...................................................................................... 3
Description ........................................................................... 3
Chassis............................................................................ 3
Support jacks................................................................... 3
Operator’s cab................................................................. 4
Steering column .............................................................. 9
Hydraulics control unit ................................................... 10
Service ............................................................................... 11
Changing the fresh air filter ........................................... 11
Check and lubrication of brake pedal ............................ 11
Windscreen wipers ........................................................ 12
Air conditioning unit ................................................................. 13
Description ......................................................................... 13
Service ............................................................................... 16
Checking the air conditioning unit ................................. 16
9407
ContChamp DRD-S Specifications 02-03
Air conditioner
z Cab unit
Circulated air flow 500-600 m3/h
Electric power consumption approx. 350 W
z Compressor
Max. speed 4000 r/min
Refrigerant R134a *)
Electric power consumption approx. 50 W
Oil capacity Zexel PAG SP-20 1.5 dl
z Condenser
Electric power consumption 250 W
z Cooling effect 6-8,5 kW

z Heating effect approx. 11 kW
*) Refrigerant R12 is no longer in production due to legislation

9407
ContChamp DRD-S Chassis 02-03
Technical Handbook Description Group 10 P. 3
Chassis
The chassis consists of:
z A unit construction frame built up around two box- sections for
best possible strength.
z Mountings for the drive axle, steered axle, telescope-boom,
lifting cylinders and transmission.
z The necessary counterweights to provide a very low centre of
gravity. Moreover, the steered axle is designed to serve as an
additional counterweight.
The hydraulic oil tank and the fuel tank are produced as separate
units and are bolted to the side of the chassis. The tanks have a
low profile, which contributes to the good visibility.
Support jacks
Certain machines are equipped with support jacks to increase
the capacity in the third container row, see group 20.
KL1436
9407
ContChamp DRD-S Operator’s cab 02-03
Operator’s cab
The operator’s cab is a separate structure and rests on the chas-
sis on rubber dampers. The operator’s seat, steering wheel and
hydraulic control levers can be adjusted for best possible operator
comfort. Effective insulation minimises the vibrations and sound
level in the cab.
The standard heating system consists of a fan and heater for
heating the air in the cab by recirculation. Fresh air is drawn in
through a ventilation air filter. Full air conditioning, with cooling,
heating and dehumidification, is available to special order.
1. Steering column with control levers and switches, ECS-terminal

2. Heating system
3. Air filter
4. Electrical central unit
9407
3 1 4 5 2 6
F
4 3 2 1
L 0
R
R
4 5
KL1406
7 8 9 10 11 12 13
1. Gear selector 6. Control lever and control panel for hydraulic functions
FORWARD/NEUTRAL/REVERSE 1/2/3/4 7. Electrical central unit with fuses and relays
2. Lever DIRECTION INDICATORS/HORN 8. Brake pedals, normal driving brake
FRONT WINDSCREEN WASHER/ 9. Release clutch
FRONT WIPERS/MAIN BEAM 10. Accelerator pedal
3. Instrument panel 11. Steering wheel adjustment
4. Steering wheel panel 12. Servo circuit breaker
5. Starting switch 13. Parking brake
9407
21 22 23
KL581
37 38 39
35 36
34
33 40 41 42 43 44 45 46 52 53
32
31
30
29
28
27
26
25
24 47 48 49 50 51
54 55 56 60 59 KL582
66
F
4 3 2 1
L 0
R
KL580
R
1 2 3
4 5
57 58 64 61 62 63
21. Pressure gauge, gearbox oil pressure 40. Spare
22. Fuel gauge 41. Spare
23. Temperature gauge, engine coolant temperature 42. Warning lamp, battery charging
24. Switch, working lights 43. Warning lamp, low engine oil pressure
25. Switch, working lights 44. Warning lamp, low gearbox oil pressure
26. Switch, working lights 45. Warning lamp, low brake pressure
27. Switch, flashing beacon (accumulator pressure)
28. Switch, hazard warning lights 46. Warning lamp, low engine coolant level
29. Switch, driving lights 47. Indicating lamp, preheating
30. Spare 48. Warning lamp, high engine coolant temperature
31. Spare 49. Warning lamp, high gearbox oil temperature
32. Spare 50. Spare
33. Spare 51. Warning lamp, parking brake ON
34. Switch, compressor air conditioning 1) 52. Spare
35. Control, recirculation/fresh air 53. Spare
36. Control, defrost/cab 54. Spare (Green lamp TWIST-LOCKS LOCKED)
37. Switch, fan 55. Spare (Orange lamp ALIGNMENT)
38. Control, heat 56. Spare (Red lamp TWIST-LOCKS UNLOCKED)
39. Control, cold 1) 57. Spare (LOCK/UNLOCK TWIST-LOCKS)
58. Spare (LENGTH ADJUSTMENT 20-40')
59. Indicating lamp, headlights
60. Indicating lamp, direction indicators
61. ECS terminal
62. Switch, windscreen wiper, rear
KL675 63. Switch, windscreen wiper, roof
64. Spare
65. Fuses
66. Hour meter
1) Optional
65
9407
1 2a 3 4 Joy-stick functions
2b 1. Tilt 1)
2. a. Locking of tilt 1)
b. Locking of levelling1)
3. Rotation
4. Side shift
5. Vertical lift 1)
6. Boom OUT/IN
5 6 7. Levelling 1)
8. Length adjustment 20'–40'
9. Unlocking of twist-locks
10. LIFT/LOWER
1)
Optional
7 8 9 10
Switch functions
13. Rotation limiting
15. AUT = Automatic locking of
twist-locks. The parking brake must
be OFF
MAN = Manual locking of
twist-locks (spring-back)
Unlocking off twist-locks,
see Joy-stick function 9 above
17. Stop at 30' and 35' 1)
18. Cab movement horizontal/vertical1)
19. Support jacks DOWN/UP 1)
20a. Red lamp, the support jacks have
left the upper position 1)
20b. Green lamp, support jacks down 1)
1) Optional
Button 17 for the connection and disconnection of N.B. When operating a machine
which is equipped with hydraulic-
the 30' and 35' stops ally moveable cab, the doors should
The position gives crawling speed the whole time during ex- be closed or the cab in its rear posi-
tension and retraction. In order to by-pass the 30' stop press tion otherwise all functions will be
and thereafter . The next stop will be 35'. broken.
It is practical to connect in once the 30' position has been
passed.
9407
A C
Lamp panel on the boom
Container handling
A. Twist-locks locked, green
B. Alignment, orange
C. Twist-locks unlocked, red
Lit lamps at container lift:

A+B
Go out after lift: B
KL20
Engagement and
disengagement
WARNING! of servo circuits KL 1407
Overriding of the safety Override

system is at one's own risk (Only in emergency situations)
and involves a risk of for- 1. Lower
ward tipping. 2. Container coupling
9407
Steering column
Surrounding the steering column are multi-function levers for
gear changing, indicators, windshield wipers, etc., as well as the
instrument panel with the ECS terminal. At the very foot of the
steering column is the steering valve (Orbitrol), activated by the
steering wheel via an angled gear. The steering column is
equipped with an adjustment knob for the alteration of steering
wheel height and rake.
.
F
4 3 2 1
L 0
R
R
1 1 2 3
2
4 5
3
KL580A
KL588
1. Gear lever 5
2. Multi-function lever
3. ECS terminal
4. Steering wheel adjustment
knob
5. Angled gear
6. Orbitrol steering valve
Column steering
9407
Hydraulics control unit

Control lever and switches used to manoeuvre the hydraulics
system are located on an adjustable console with comfortable
working position
The control lever is a joystick that is electrohydraulically connect-
ed to the main valves.
KL 1407
1 2 3 4
1. Control lever
2. Connection and disconnection of servo cir-
cuits
3. Control switches for attachment
4. Switch for overriding of safety system (for
use in emergency situations only). Affects
both overload protection and container con-
nection.
WARNING!
Overriding of the safety system is carried out at your own

risk as such overriding involves a risk of forward tipping.
9407
Technical Handbook Service Group 10 P. 11
Changing the fresh air filter

(every 200 hours or when needed)
1. Remove the filter casing retaining bolts and remove the filter
element.
2. Wash the filter insert with water and detergent or by using a
high pressure washer. Replace the insert if necessary.
3. Reinstall the filter insert.
Check and lubrication of brake pedal

(Every 1000:e hours)
1. Check and tighten the locking screws 3, so that the brake ped-
1 2 al is securely fitted in the console.
2. Lubricate the brake pedal shaft through the nipples 2.
3
4
1. Brake pedal
2. Lubricating nipple
3. Locking screw
4. Shaft
9407
Windscreen wipers
The wiper arms are fixed to the wiper motor shafts via conical
splines. The shafts are manufactured of hardened steel and the
wiper arm mounting of soft, pressed metal. When fitting, the nuts
must be tightened so hard that the splines are pressed well into
the mounting and function as a carrier.
Removal
1. Remove the wiper arms by loosening the nuts and thereafter
tapping and carefully rocking the arms to and fro.
Fitting
1. Check to ensure that the splines on the motor shaft are free
from the softer material from the wiper arm mounting.
1 If this is not the case, clean the splines so that they can
pressed fully into the wiper arm mounting.
2. Fit the wiper arms onto the motor shafts and tighten the nuts
to a torque of 16-20 Nm.
Hold the wiper arm to take up the torque pressure so that it is
not transferred to the motor, which could result in damage
.
IMPORTANT!
2
The nuts must be tightened sufficiently hard, otherwise
the shafts may start to slip inside the wiper arm mounting,
resulting in damage.
3
4
1. Wiper arm fitting

2. Securing nut, wiper arm
3. Grooved cone on motor shaft
4. Wiper motor
9407
ContChamp DRD-S Air conditioning unit 02-03
Air conditioning unit

The air conditioning unit consists of the parts shown in the illus-
tration and its function is to maintain the climate in the operator’s
cab as comfortable as possible. The air conditioning unit:
z heats the air when it is cold
z dehumidifies the air when it is humid
z removes impurities from the air
z cools the air when it is warm
The equipment is controlled by switches and controls on the in-

strument panel.
3
8
9
7
2
15 16
12 14
10
1. Heating control
2. Heat exchanger
3. Vapourizer
4. Expansion valve
5. To condenser
6. To compressor 11
7. Heating valve
8. From engine 13
9. To engine
10. Fan
11. Fan
12. Fan control
13. Fresh air filter
14. Air disperser
15. Control defrost/cab
16. Defroster outlet
The heating and ventilating system

9407
2
4
D C
E E
7 A B
6 1
G
1. Liquid receiver/filter dryer A High-pressure gas

2. Evaporator B High-pressure liquid
3. Fan C Low-pressure liquid
4. Expansion valve D Low-pressure gas
6. Condenser E Warm air in cab
7. Compressor F Cooled air to the cab
G Outside air for removing heat
9407
Compressor
The air conditioning system is driven by the compressor. This
performs as a pump, drawing cold, low-pressure gas from the
evaporator, compressing it and thereby raising its temperature,
and discharging it at high pressure to the condenser.
The compressor is driven by V-belts directly from the diesel en-
gine. Switching between operation and idling is controlled by an
electro-magnetic clutch which, in turn, is controlled by a thermo-
stat whose sensor is located between the fins of the evaporator
coil. The thermostat switches off the compressor at low tempera-
tures, to prevent icing of the evaporator.
Condenser
The function of the condenser is to convert the hot high-pressure
gas from the compressor into liquid form. The tubes and fins of
the condenser coil absorb heat, which is then removed by the air
delivered by the fan.
The temperature of the refrigerant in the condenser varies from
about +50°C to +70°C. The pressure varies between 12 and 20
bar, depending on the ambient temperature and the flow of air
through the condenser. When the refrigerant is condensed into
liquid form, it is transferred under pressure to the liquid receiver/
filter dryer.
Liquid receiver with filter-dryer

The function of the liquid receiver with integrated filter dryer is to
collect the liquid coolant, bind the moisture, and to filter and re-
move impurities. The receiver, which is located in the condenser
housing, also serves as the expansion vessel in the refrigeration
circuit.
After flowing through the dryer in the bottom of the liquid receiver,
the refrigerant flows through a riser tube. A sight glass enables
the operator to check that the liquid flows without the presence
of any bubbles, and that the system is filled with a sufficient
amount of refrigerant.
Expansion valve
The expansion valve throttles the flow and passes an optimised
quantity of refrigerant that the evaporator is capable of evaporat-
ing.
The expansion valve is also the part of the circuit which separates
the high- pressure side from the low-pressure side. The refriger-
ant flows to the expansion valve under high pressure and leaves
it under low pressure.
The amount of refrigerant which passes the evaporator varies,
depending on the thermal load. The valve operates from ’fully
open’ to ’fully closed’ and in-between searches for a point to give
optimum evaporation.
Evaporator
The heat necessary for evaporating the refrigerant is extracted
from the cab air which is circulated by a fan through the evapora-
tor coil. The cab air is thus cooled, and is distributed and returned
to the cab.
In the evaporator, the refrigerant reverts to the gaseous state and
returns to the compressor suction, thereby completing the cycle.
9407
The liquid refrigerant should be completely evaporated before it

is allowed to flow from the evaporator. The refrigerant is still cold
WARNING! even when it has completely evaporated. The cold vapour which
flows through what remains of the evaporator continues to absorb
heat, and then becomes overheated. This means that the
z If the refrigerant hose should fail or if temperature of the refrigerant has risen to above the point where
other refrigerant leakage should occur, it evaporates without changing the pressure.
switch off the air conditioner immedi- In an evaporator which operates at a suction pressure of 2 bar,
ately. the liquid refrigerant will have a temperature of –1.1°C. When the
z Refrigerant is injurious to the skin and refrigerant is subsequently evaporated through heat absorption
eyes. in the evaporator, the temperature of the gas will rise at the evap-
z Never release refrigerant in an en- orator outlet to +1.6°C. This represents a difference of 2.7°C be-
closed space. If released into a service tween the evaporation temperature and the temperature at the
pit, for instance, the gas may cause as- outlet. This is called overheating.
phyxia. All expansion valves should be adjusted at the plant in such a way
z It is forbidden by law to discharge re- that maximum evaporation with overheating is performed in the
frigerants into the airintentionally. air conditioning system.
z Never carry out welding on a charged
refrigeration system or in its vicinity.
z Only authorised service mechanics are
allowed to drain off and fill refrigerant in
the air conditioning system.
Only the prescribed refrigerant may be
used when refilling. Checking the air conditioning unit
If the unit is in continuous operation, this check should be carried
out every week from early spring to late autumn and during ex-
tended periods of high humidity during the winter.
If the unit is used very little during cold and dry winter periods, the
compressor should be run for a few minutes every week, to lubri-
cate the rubber hoses, couplings, seals and shaft seal.
1. Start the engine and start the air conditioner.

At an outdoor temperature below 0°C, the system cannot start
since the low-pressure relay breaks contact.
2. After 10 minutes of operation, check that no bubbles are
visible in the sight glass of the filter-dryer. (Bubbles should
occur only when the compressor is started and stopped.)
If there are any air bubbles, subsequent filling should be per-
formed by an authorised service mechanic.
3. Check that the condenser is not clogged. If necessary, clean
the condenser fins and the fans with compressed air.
4. Change the fresh air filter as necessary.
5. Check the V-belt tension and the compressor mounting.
6. Check that the magnetic coupling engages and disengages
satisfactorily.
7. Check that the condensate drain from the cooling element is
not clogged. Check for leakage.
9407
IN CAB UNIT CONDENSER UNIT
RD 1,5
RD 1,5
A
L GL 1,5
M SV 1,5
H RD 1,5
1 4 4
C
R R
8
BR 1,5
M
30 87
2 GL 1,5 85 86 BR 1,5
M M
BR 1,5
3
VT 1,5
7
HIGH
LOW
10
1. Fan switch
2. Cooler on/off
3. Anti-freeze thermostat
4. Resistor
5. Fan motor
6. Indicator lamp – cold (in push button)
7. High-/low-pressure monitor
8. Relay
9. Condenser fan
10. Compressor
9407
Group 20
Electrical system
Specifications.............................................................. 2 ECU 3
Electrical system......................................................... 3 Functions ............................................................... 66
Description ............................................................... 3 Circuit board .......................................................... 67
Checking the electrolyte level of the batteries .... 5 Module 54 Tilt ........................................................ 68
Fuses .................................................................. 5 Module 56 Cab movement..................................... 69
Relays ................................................................. 6 Module 61 Support jacks ....................................... 71
Bulbs ................................................................... 7 Diagrams
Starting from another battery .............................. 8 Gearchanging systems .......................................... 73
Air operated operator’s seat................................ 8 Components, A38630.0100 and A38630.0200...... 77
ECS-system ECS overview ........................................................ 78
Overview .................................................................. 9 Electrical diagram explanations ............................. 79
Terminal ................................................................ 10 Cable markings...................................................... 80
Menu structure .................................................. 10 Component list
Operating menues ............................................ 11 Electrical diagrams ECS top lift – page
Error messages................................................. 15 A24925.2000 - 1, 2, 3 A24925.2200 - 1
Service menues ................................................ 20 A24927.2000 - 1, 2 A24927.2200 - 1, 2
ECU-processor unit................................................ 22 A24929.2000 - 1, 2
Transmission data kit ........................................ 23 Electrical diagram, truck body.................... A08334.1000
Engine data kit .................................................. 23 Electrical diagram, inner, standard ............ A08333.1000
ECU 1 El-servo, singel ECU (S) ............................ A38630.0100
Functions................................................................ 24 El-servo, double ECU (S) .......................... A38630.0200
Circuit board........................................................... 26 Diagram attachment, 4 pages..............A38414.0100,1-4
01 Automatic gear changing ............................. 27 Feed ................................... A38414.0100, 1/4
04 Lever steering .............................................. 28 Indication ............................ A38414.0100, 2/4
07 Monitoring .................................................... 31 Servo .................................. A38414.0100, 3/4
Working lights ..................... A38414.0100, 4/4
ECU 2 Cable to twist-locks .................................... A38636.0100
Functions................................................................ 33 Cable feed KDU 791 .................................. A38415.0100
Circuit board........................................................... 34
Installation, boom ................................................... 35
Electric servo.......................................................... 36
Control lever...................................................... 37
Pressure sensors right and left lift cylinders ..... 41
Lift - regeneration - lower .................................. 42
Boom extension - regeneration......................... 45
Rotation............................................................. 49
Twist-locks ........................................................ 51
Side-shift ........................................................... 53
Length adjustment 20-40’ ................................. 54
Module 50 Mechanical Overload Protection .......... 56
Module 51 Vertical lift for Module 50...................... 59
Module 52 Vertical lift + Balance for Module 50..... 60
Module 57 Hydraulic Balance ................................ 61
Module 59 Limitation Height/
LC-distance for Module 50/60 ................................ 62
Module 60 Electronic Overload Protection............. 63
9407
Alternator rating 1920 W
Starting battery voltage 24 V (2 x 12 V)

capacity 140 Ah
earthing negative
9407
ContChamp DRD-S Electrical system 02-03
The system voltage is 24V and the supply is taken from two 12V
IMPORTANT! batteries connected in series and charged by an alternator
Always open the main switch when- across electronic rectifying and voltage stabilisation circuits.
ever work is to be carried out on the .
electrical system, if the truck is to
remain idle for some time and when- The negative and positive poles are both connected across a
ever welding work is to be carried out main switch. The negative pole is then connected to the chassis.
on the truck. Warning lamps and instruments are clearly arranged on the in-
strument panel. The central electrical unit with fuses and relays
is located on the lower section of the cab’s rear wall.
4
3
1. Main switch
2. 24 V battery
3. Running lights
4. Rear lights
5. Rotating warning light
9407
2 3 4 5 6 7 8 9
10
11
12 13 14 15
1. Sensor, outgoing revs (ECS or reversing block)

2. Sensor, gearbox oil temperature, warning lamp and meter
3. Sensor, gearbox oil pressure, warning lamp and meter
4. Main fuses 2 X 50A
5. Relay preheater
6. Sensor, engine oil pressure, warning lamp
7. Sensor, engine oil pressure, meter
8. Sensor, coolant temperature, warning lamp
9. Sensor, coolant temperature, meter
10. Starter motor
11. Sensor, coolant level
12. Alternator
13. Solenoid valve, stop engine
14. Throttle lever, injection pump
15. Solenoid valve for gear changing
Engine electrics
9407
Checking the electrolyte level of the batteries

N.B.
The starting batteries accompanying The batteries are fitted behind a cover on the left-hand side of the
the truck are of the maintenance-free truck. The electrolyte level should be about 10 mm above the
type, which implies that it should not cells. Top up with de-ionized water as necessary.
be necessary to top-up with electro-
lyte during the life of the batteries.
Relay box in cab – fuses
However, the level of the electrolyte Fuse Rating
should preferably be checked once or No. Circuit protected A
twice a year. Fill as required by add-
ing de-ionized water. S1 Wiper motor front, direction indicators,
seat buzzer, parking brake sensor............................... 10
S2 Ignition key, preheater, starter motor,
air conditioner, cab lighting ......................................... 15
S3 Container attachment, safety interlock ........................ 15
S4 Electric gear-changing ............................................... 5
S5 Warning lamps, instrument illumination, relay,
coolant level .................................................................. 5
S6 Brake lights, reversing lights, reversing alarm ............ 15
S7 Fan (Option: Air conditioning) 1) .................................. 25
S8 Spare (Option:Container lights) 1) ............................... 15
S1-6 7-12 13-18 19-24 S9 Working lights (15 A for 4 lamps) 1)
Hazard beacon ........................................................... 10
S10 Working lights, standard (15 A for 4 lamps) ............... 10
S11 Horn, screenwash motor, wiper rear and roof,
wiper front, intermittent relay ....................................... 10
S12 Driving lights (main fuse), rear lights
(main fuse), position lights 15
S13 Main beam, right-hand .................................................. 5
S14 Main beam, left-hand..................................................... 5
B S15 Dipped beam, right-hand............................................... 5
S16 Dipped beam, left-hand ................................................. 5
S17 Rear light, left-hand ....................................................... 5
S18 Rear light, right-hand..................................................... 5
S19 ECU11) ........................................................................ 10
S20 ECU2........................................................................... 10
S21 Voltage converter .......................................................... 5
S22-24 Spare............................................................................. –
1
)Optional equipment
B Miscellaneous fuses
A Main switch
B Main fuse, boom (1x25 A)
D Main fuse for truck electrical system
Fitted on the engine, 2x50 A
A KL593A
D
9407
Relays
305 Reversing light
314 Parking brake, disengagement
315 High power (Starting switch)
316 Wiper motor, front
320 Electric stop (ECS 07) 1)
322 Coolant level (ECS 07) 1)
323 Pulse relay, direction indicators
328 Gear shift (ECS 01) 1)
330 Starting block
331 Propulsion forward
332 Propulsion reverse
334 Clutch release (ECS 01) 1)
367 Lever steering (ECS 04) 1)
322-1 Coolant level
322-2 Coolant level (ECS 07) 1)
399 Spare
Miscellaneous
321-1 Intermittent relay wiper front
321-2 Intermittent relay wiper rear 1)
960 Reversing interlock
1) Optional equipment
KL 1541
9407
KL 1542
Bulbs
Rating
Description Watts Base
Instruments 3 BA7s
Indicating lamps 1,2 W2x4,6d
Cab lighting 10 S8,5
Rear lights, red 5 BA15s
Brake lights 21 BA15s
Direction indicators 21 BA15s
Position lights 5 SV8,5
Driving lights (full/dipped beam) 75/70 P43t-38
Reversing lights, white 70 PK22s
Working lights 70 PK22s
Hazard beacon 70 PK22s
9407
Starting from another battery

Make sure the auxiliary batteries are connected in series, so
that 24 V will be supplied.
N.B. Do not disconnect the truck-battery cables
Connect the jumper cables in the following order:

WARNING! 1. Red cable (+) to auxiliary battery
2. Red cable (+) to truck battery
Batteries emit oxyhydrogen which is 3. Black cable (–) to auxiliary battery
an explosive gas. A spark, for 4. Black cable (–) to a location some distance away from
example from incorrectly connected the truck battery, such as the negative cable connection on
starting cables, could cause a battery
to explode and result in serious injury the chassis.
and damage. Start the engine
Do not disturb the jumper cables while starting, as sparks
may otherwise be caused. Do not lean over either battery.
Disconnect the jumper cables in exactly the reverse order.
1. Motor and compressor

Installed in a box on the right hand
side of the machine or beneath the
cab
2. Pressure monitor
3. Fuse 3, 56.3
2
Air operated operator’s seat
9407
ContChamp DRD-S ECS 02-03
Technical Handbook Overview Group 20 P. 9
Kalmar’s ECS - Electronic Control System - is a modular control

and monitoring system to ensure optimum operational security
and total economy. It is possible to combine the system’s different
modules in a number of different ways.
All vital points of the trucks different systems are connected to
one or several central computer units, ECUs. A terminal display
in the operator’s cab shows current values and generates an
alarm if the values exceed the programmed tolerances.
DRD Container machines are equipped with ECS as standard.
Depending on how respective machines are equipped, one, two
or three ECU central units may be fitted.
ECU 1 is used for different additional modules, such as 01 Au-
tomatic Gear Changing, 04 Lever Steering, 06 Mini-steering, 07
Monitoring. See separate descriptions in respective sections.
ECU 2 is obligatory and is used to control the El-Servo cir-
cuits. See the El-Servo section. ECU 2 also functions as
overload protection and for the regeneration system.
ECU 3 is used for machines with modules according to the
table below.
ECU 1 1) ECU 2 ECU 3 1)

01 Automatic El-Servo Bottom lift
Gear Changing 1) 50 Mechanical over- 54 Tilt 1)
04 Lever Steering 1) load protection 55 Pile slope 1)
06 Mini-steering 1) Regeneration 61 Support jacks 1)
07 Monitoring 1) 51 Vertical lift 1)
52 Balance + vertical
lift 1)
53 Locking tilt 1)
57 Hydraulic
balance 1)
58 Container
counter 1)
1 59 Limitation Height/
LC-distance 1)
2 70 PC/Printer 1)
60 Electronic over-
load protection
ECU 3 Regeneration
Vertical lift
53 Locking tilt 1)
58 Container
counter 1)
59 Limitation Height/
DRD400-60S5
LC-distance 1)
70 PC/Printer 1)
1)
KL621b-c Optional equipment
The ECS:
– monitors the engine and gearbox to ensure reasonable
operating conditions
– monitors the components in the system, e.g., sensors, to
ensure their correct function
– provides torque controlled automatic gear changing
– interrupts hydraulic functions when overload of the steer-
ing axle occurs
– controls the regeneration function for boom extension and
lift cylinders
– controls vertical lift, balance, pile slope etc.
If a fault occurs:
– a red warning lamp blinks on the terminal
– an error message appears on the terminal display
– The ECS limits the functions of the truck in different ways
depending on the seriousness of the fault. Certain func-
tions are monitored on two levels, where level 2 limits the
functions of the truck. See the error messages on the ter-
minal display on the following pages.
9407
Technical Handbook Terminal Group 20 P. 10
Terminal functions
1. Arrow left is used to scroll between the different menus.
8 7 2. Arrow right is used to scroll between the different menus.
3. R is used to reset the display after an error message. All er-
rors, with the exception of certain level 2 errors can be reset
by pressing this button. The red warning lamp is then extin-
guished. The lamp begins to blink again after 3-10 minutes,
depending on the fault, if it has not been rectified.
4. - is used to decrease a value.
F
5. + is used to increase a value.
4 3 2 1
N 6. ENTER is used to access the service menus and to save
L 0
R
new values when setting up and calibrating the system.
KL580B
R
Access to the service menus also requires the use of special
1 2 3
codes, that are separately obtainable from Kalmar.
4 5
7. A red warning light blinks in the event of an error and is ex-
tinguished when reset by pressing button 3.
8. The terminal display has 4 lines with space for 20 characters
on each line. Graphical presentation of operating menus and
R error messages.
1 2 3
Menu structure
4 5
There are three types of menu:
1. Operating menus
6 The operating menus are accessible to the operator. The
menus that can be selected depend on how the truck is
equipped and are determined in SETUP. All operating men-
us are part of a connected loop. Use arrow RIGHT/LEFT to
move around the loop. The loop also contains:
1.a Overload indicator
Depends on the selected overload protection, module 50/
60.
2. Error messages
Displayed automatically and have priority over other menus.
3. Service menus
The operating menu loop always contains the KALMAR IN-
DUSTRIES SERVICE main menu.The service sub-menus
under this main menu require access to codes that can be
found on a special list from Kalmar. If ENTER is pressed by
mistake in the service menu and the ENTER CODE menu is
displayed, return to the operating menu by pressing ENTER.
For further information, refer to the respective headings.
1.
1. 1.
1.
KL1409
1.
Enter
2.
1.
1a.
1a.
3.
9407
Operating menus
The menus that are displayed on the terminal depend on the
modules with which the truck’s ECS is equipped. The overview
below shows the possible combinations. Use either arrow
RIGHT/LEFT to switch between menus. All operating menus are
01 Automatic gear changing in a connected loop.
07 Monitoring
50 Mechanical overload protection system Access to the sub-menus under the service menu requires an ac-
60 Electronic overload protection system cess code. If ENTER CODE is displayed by mistake, return to the
operating menu by pressing ENTER.
N.B. Additional menus may occur as a result of adaptation to spe-

cific customer requirements.
50
6
5
2
1
01.50
6
5
3
1
1 10
07.50
01.07.50
6
5 9
4
7 8
KL1410
Explanations, see next page
Operating menus with mechanical overload protection, module 50

9407
Operating menus, module 50
1. Main menu KALMAR INDUSTRIES SERVICE

1
2. Normal operating condition, module 50

2
a. 1750rpm Engine speed, r/min
a
a
3 b 3. Normal operating condition,
module 50 + module 01
c
a. 1750rpm Engine speed, r/min
b. F3 Current gear
c. 14 km/h Current speed
a
4. Normal operating condition,
4 b
module 50 + module 01 + module 07
c a. 1750rpm Engine speed, r/min
d b. F3 Current gear
d. Fuel level. The tank is full when the indicator is filled to
the right.
5 5.
Red lamp blinks
The steering axle is overloaded.
It is not possible to switch to other menus until the overload
is rectified.
6 6. The system interrupts operation. The red warning lamp lights

continuously.
The machine has forward overload.
is rectified.
a
7 7. a. 75 °C Engine coolant temperature
b. 3.8 bar Engine oil pressure
b
a
8 8. a. 75 °C Gearbox oil temperature
b. 3.8 bar Gearbox oil pressure
b
a
9. a. 24.5 v Battery voltage
9
b b. 75 °C Hydraulic oil temperature
a
10. a. 28756:21.54h Total operating time, tim: min. sek.
10 b. 130h Time to next service, tim
b
9407
60
2 1
4
01.60
3 1
4
07.60
01.07.60 8
9 7
1 6
5
3 4
KL1411
Explanations, see next page
Operating menus with electronic overload protection, module 60

9407
Operating menues, module 60

Module 60 overload protection function, under normal conditions,
functions as a balance and gives a continual reading of the size
1 and position of the load.
1. Main menu KALMAR INDUSTRIES SERVICE
2. Normal operating condition, module 60.

a. 1750 rpm Engine speed, r/min
c. 3.0 m Distance between the front edge of the
wheels and the centre of gravity of the load.
a d. 25.5 t Current load in tonnes
2 c e. Indicator showing steering axle load, fills the display to the
d left for 95-100% of the permitted load. When the indicator
reads full, the system interrupts operation due to overloading
e of the steering axle. The red warning lamp blinks.
f It is not possible to switch to other menus until the overload
is rectified.
a f. Load indicator, fills the display to the right for 0-100%
3 loads. When the load indicator reads full, the system inter-
b
c rupts operation due to forward overload.
The red warning lamp lights continually.
d
has been rectified.
e
f 3. Normal operating condition,
module 60 + module 01 + module 07
a a. 1750 rpm Engine speed r/min
4 b. F3 Current gear
b
c c. d. e. f. See menu 2 explanation above.
d 4. a. 10.38 t Current load in tonnes
b. 1.07 m Boom extension
c. 3.08 m Lc-distance. Distance between drive axle
a centre and load centre.
5 b d. 23.0 ° Boom angle
c
d 5. a. 1750 rpm Engine speed r/min
b. F3 Current gear
a d. Fuel level. The tank is full when the indicator is filled
6 to the right.
6. a. 75 °C Engine coolant temperature

b b. 3.8 bar Engine oil pressure
a
7
7. a. 75 °C Gearbox oil temperature
b. 3.8 bar Gearbox oil pressure
b
8 a
b 8. a. 24.5 v Battery voltage

b. 75 °C Hydraulic oil temperature
a
9
9. a. 28756:21.54 h.Total operating time, h: min. sec.
b b. 130h Time to next service, h
9407
Error messages
In order of priority. If two faults occur at the same time, the termi-
nal displays the fault with the highest priority. Error messages al-
ways have a higher priority than normal menus.
01 = Automatic gear changing
Errors 01-08 are level 2 errors and cannot be reset prior to the
04 = Lever steering
fault being rectified.
06 = Mini Steering
The first two figures to the left of the menu pictures show to which
07 = Monitoring
module the error message relates.
50 = Mechanical overload protection
(These figures do not appear on the display)
60 = Electronic overload protection
01, 07 01 01. Battery voltage very low/high

Stop as soon as possible and contact service.
02. Faulty signal from accelerator sensor.

01, 07 02 Engine speed reduction.
03 03. Faulty signal from injection pump motor sensor.

01, 07
Engine speed reduction.
01, 07 04
04. Gear lever not functioning.
07 05 05. Engine oil pressure extremely low.

07 06
06. Coolant temperature extremely high.
07 07 07. Gearbox oil pressure extremely low.

07 08
08. Gearbox oil temperature extremely high.
9407
01, 07 09 09. Faulty signal from engine rev sensor.

07 10 10. Low engine oil pressure.

Check oil level and top up as required.
07 11 11. High coolant temperature.

Check coolant level and top up as required.
07 12 12. Low gearbox oil pressure.

07 13
13. High gearbox oil temperature.
07 14 14. Fuel level extremely low.

Fill the tank to avoid air in the system.
07 15 15. Low coolant level.

Top up the coolant fluid.
16. High hydraulic oil temperature.

07 16
Operation possible.
Contact service.
07 17 17. Faulty signal from fuel gauge sensor.

Operation possible.
Contact service.
07 18
18. Faulty signal from gearbox oil pressure sensor.
Operation possible.
Contact service.
9407
07 19 19. Faulty signal from engine oil pressure sensor.

Operation possible.
Contact service
07 20 20. Faulty signal from coolant temperature sensor.

Operation possible.
Contact service.
21 21. Faulty signal from gearbox oil temperature sensor.

07
Operation possible.
Contact service.
07 22 22. Faulty signal from hydraulic oil temperature sensor.

Operation possible.
Contact service as soon as possible.
23 23. Service interval exceeded.

07
24. Faulty signal from prop shaft rpm sensor

01, 07 24
04 25 25. Steering lever fault.

Switch off the steering system.
26. Faulty signal from steering sensor.

04 26 Switch off the steering system.
06 27 27. Faulty signal from mini steering sensor.

Switch off the steering system.
07 28
28. Warning! Low brake pressure.
9407
- 31 31. System fault ECU 1.

- 32 32. System fault ECU 2.

50 50. Battery voltage very low/high.

07 Contact service as soon as possible.
60 51
51. Communication with ECU 3 broken.
60 52 52. Communication with ECU 1 broken.

First try switching off and then re-starting the engine!
If the fault remains, contact service as soon as possible.
53 53. Faulty signal from angle sensor

60 Stop as soon as possible and contact service.
60 54
54. Faulty signal from length sensor.
Stop as soon as possible and check the sensor wire.
Contact service if the fault remains.
50, 60 55 55. Faulty signal from regeneration sensor.

The regeneration is discontinued.
Contact service.
50, 60 56
56. Faulty signal from hydraulic pressure sensors for left lift cyl-
inder. (There is a sensor in both feed and return lines)
50, 60 57 57. Faulty signal from hydraulic pressure sensors for right lift cyl-
inder. (There is a sensor in both feed and return lines)
9407
50 58
58. Faulty analog signal from joystick.
All boom functions are interrupted.
50 59 59. Faulty signal from sensor for end position damping

60 60. Faulty signal from twist-locks sensors.

- Applies to both locked and unlocked position.
The signal from one or more sensors remains on for more
than 60 sec after unlocking of twist-locks.
Check that the contact pins can move freely up and down.
Contact service as soon as possible if the fault remains.
60 61
61. System fault.
Load curve is missing.
60 62 62. Each one of the Module 60 errors will activate error menu 62.
When error menu 62 is activated:
Warning lamp on the ECS-terminal lights up
When pressing RESET:

Menu 62 starts blinking, 5 sec ON and 5 sec OFF
The hydraulic functions LIFT/LOWER and BOOM OUT/IN
are operative but at a lower speed.
9407
Service menus
All service sub-menus are accessible from the main KALMAR IN-
DUSTRIES SERVICE menu, thereafter, a code must be regis-
tered. There are four different codes, codes 1, 2, 3 and 4.
Code 1 leads to the SETUP, INITIATION and CALIBRATION
Detailed descriptions of SETUP, of the modules in ECU1.
INITIATION and CALIBRATION can be
Code 2 leads to the INITIATION of the El-servo in ECU 2.
found in the separate
ECS SERVICE Handbook Code 3 leads to the CALIBRATION of module 60 in ECU 2.
Contact Kalmar Code 4 leads to the DIAGNOSIS menu.
Definition of terms:
SETUP is the setting of the basic values of the machine, defining,
for example, the modules with which the machine is equipped.
This determines which operational menus then appear.
INITIATION is the basic setting of the different modules’ parame-
ters.
CALIBRATION is the individual adjustment of the max. and min.
values of the different modules’ signals. Calibration is unique for
each machine.
The illustrations below and on the following page provide an over-
view of all available service menus. All of them are accessed from
the KALMAR INDUSTRIES SERVICE main menu.
Code 1
R E T U R N T O M A I N M E N U C A L I B R A T I O N
S T E E R I N G L E V E R A N D
W HE E L P O S I T I ON
E N T E R E N T E R
S E T U P I N I T I A T I O N MO D U L E 0 4
L E V E R S T E E R I N G
E N T E R E N T E R
S E R V I C E I N T E R V A L C A L I B R A T I ON
2 0 0 ( + / - ) I N J E C T I ON MO T O R AN D
T I ME T O N E X T S E R V I C E I N I T I A T I O N MO D U L E 0 1 A C C E L E R A T O R P E D AL
E N T E R A U T OM A T I C G E A R E N T E R
C H A N G E
E N T E R
1 2 14 1 2 3
13
5 4
12 INITIATION
SETUP ECU1 3
MODULE 04 5
11 6
4 10 9 8 7
12 1 2 7 1 2
11 3
INITIATION CALIBRATION
10 4 6 3
MODULE 01 MODULE 01
9 5
8 7 6 5 4
7 1 2
CALIBRATION
6 MODULE 04 3
Service menus
KL722-C 5 4
under Code 1
9407
Code 2 Code 3
Code 4
19 20 1 2 3 15 16 1 2 3
18 4 14 4
17 5
16 SETUP EL-SERVO 6 13 CALIBRATION 5
ECU2 MODULE 60
15 7 6
12
14 9 8 11 7
13 12 11 10 10 9 8
KL723-C
10 1 2 3
9
DIAGNOSIS 4
8 5
7 6
Detailed information about the different

service menu paths can be found under re-
spective section descriptions.
The connected loops then appear as
shown in the adjacent picture.
The arrows beside the menus show the
switch paths between menus. Use RIGHT/
LEFT arrow keys.
Service menus
under Codes 2, 3 & 4
9407
Technical Handbook ECU - Processor Unit Group 20 P. 22
ECU - processor unit

The computer processor unit receives signals from connected
sensors, processes the signals and transmits them to the sys-
When replacing the EPROM, always tem’s different controlling organs, such as valves, motors, etc.
use Kalmar’s special tools Each ECU contains two identical micro-processors. Each micro-
processor has its own EPROM that contains the relevant pro-
gram-ware and parameters for the machine in question. These
EPROMs are marked with the same number as the last three
numbers of the corresponding micro-processor number. These
1
three numbers are used to ensure that the EPROM is fitted in the
correct location to match the corresponding micro-processor
when an EPROM replacement is carried out.
Example: The micro-processor has number 80C592. The corre-
KL678 sponding EPROM is then number 592 and must be fitted adja-
cent to 80C592.
Each EPROM has notch at one end and this should be matched
with the corresponding notch in the EPROM socket.
Analogue OUT-signals and digital IN-signals are indicated by red
or green LEDs (light emitting diodes). Analogue IN-signals are
not indicated. The LEDs are marked LE1-LE42 and are used for
fault finding. For each ECU there is a table listing the relevant
2
junction box pins, the corresponding signal, LEDs and machine
KL679
functions. See respective sections.
In the event of a fault, first investigate the IN-signals. If an IN-sig-
nal is incorrect, the fault lies with the sensor and/or cables. If, on
the other hand, the IN-signal is correct, the fault lies in the proc-
essor.
N.B. The only permissible action to be taken with the ECU is

the replacement of the EPROM. If this does not rectify the
problem, then the complete ECU, including the housing,
must be replaced with an exchange unit from Kalmar.
3
EPROM = Erasable Programmable Read Only Memory
Kalmar special tools

1, 2 and 3 below, are parts of the ECS kit, art. no. 425817.8068.
1. Extractor.
KL680 Art.nr 923827.0002
2. Fitting tool.
Art.nr 923827.0001
3. Anti-static mat.
The mat should be connected to earth and to one wrist.
Art.nr 923830.0001
4. The EPROM pack.
This must always be used for the transportation and storage
4 of the EPROM. The pins should be pressed into the plastic
which neutralizes any static electrical charge.
Art.nr923830.0002
KL681
9407
Technical Handbook ECU - Processor Unit Group 20 P. 23
Transmission data kit

Data kit Truck Gearbox No. of Wheel Wheel Pulses Comments
no. gears dimensio radius per rev
ns
8 DRD 36 000 4 18.00x25 0.73 50

40 000
9 DRD 21.00x35 0.93
10 DRD 18.00x33 0.83
Engine data kit

Data kit Truck Engine Model Pulses per Factor Comments
no. engine rev
1 DRD VOLVO TD/TWD 30 1023 Volvo-engines without

frequency controll
4 Scania DSI 11 158 194
6 VOLVO TWD1231VE 30 1023 Frequency control
7 VOLVO TWD1031VE 30 1023 The control motor operates

inverted
8 Scania DSI 9 22.7 1352 W-connection alternator 65A
9 Scania DSI 11 21.1 1457 W-connection alternator65A
10 Scania DSI 9 30.3 1014 W-connection alternator 90A

11 Scania DSI 11 28.1 1093 W-connection alternatorr 90A
13 Scania DI 12 21.1 1457 W-connection alternator 65A
14 Scania DI 12 28.1 1093 W-connection alternator 90A

9407
ContChamp DRD-S ECU 1 02-03
Technical Handbook Functions Group 20 P. 24
ECU 1 functions
ECU Signal LED Function Module
Pin 01 04/06 07
40 Analogue IN 1. 0-10V Steering lever/Mini-steering signal A x
42 Analogue IN 2. 0-10V Accelerator pedal 2 x
64 Analogue IN 3. 0-10V Wheel return wheel position, steering axle x
65 Analogue IN 4. 0-10V -
66 Analogue IN 5. 0-10V -
67 Analogue IN 6. 0-10V Servo motor throttle return x
52 Analogue IN 7. 0-10V Accelerator pedal 1 x
1 Analogue OUT 1 LE5 Steering valve left x

3 Analogue OUT 2 x
4 Analogue OUT 3
5 Analogue OUT 4 -
47 Analogue OUT 5 LE38 (+37) Steering valve right x
69 Analogue OUT 6 LE36 (+35) Servo motor throttle control (pulses to servomotor) x
8 Digital IN 1 LE14 Gear position 1 x x x
11 Digital IN 4 LE23 Gear position F x x x
31 Digital IN 5 LE13 Gear position R x x x
32 Digital IN 6 LE16 Brakes/Parking brake active x
33 Digital IN 7 LE19 Level monitor engine cooling system x
34 Digital IN 8 LE22 Seat rotation x
55 Digital IN 9 LE15 Brake pressure x
56 Digital IN 10 LE18 Lever steering ON/OFF. LE18 lights up when the x
button for lever steering is in the ON position - a
check that the cable is OK
57 Digital IN 11 LE21 Manual gear change down x
58 Digital IN 12 LE14 Manual gear change up.(Shift MAN/AUT, option) x x
2 Digital OUT 1 LE6 Valve 1 gear changing x x x
26 Digital OUT 4 LE8 Valve F gear changing x x x
48 Digital OUT 5 LE9 Valve R gear changing x x x
49 Digital OUT 6 LE11 Alarm 1 x
50 Digital OUT 7 LE12 For electric trucks x
22 Digital OUT 8 LE32 (+31) Control for changing between steering wheel/lever x
steering and K lamp contact. LE32 lights red when
lever steering is connected. LE31+LE32 shows
weak light when normal steering is connected (i.e.,
lever steering disconnected)
46 Digital OUT 9 LE34 (+33) Direction of servo motor throttle control. LE34 and x
33 alternate depending on the direction of the mo-
tor. When the motor stands still, e.g., when the ac-
celerator pedal is in the upper position, both light
up “weakly” without alternating. Depress the accel-
erator and check that the LEDs light alternately
9407
ECU Signal LED Function Module

Pin 01 04/06 07
6 NTC 1 Engine coolant temperature x
7 NTYC 2 Gearbox oil temperature x
30 NTC 3 Hydraulic fluid temperature x
53 NTC Ambient temperature x
35 Pulse sensor 1 LE28 Engine revs., functions only on Perkins engines x x
59 Pulse sensor 2 LE27 Drive shaft revolutions x x x
60 Pulse sensor 3 + LE25 Steering wheel revolutions, anti-clockwise x
36 Pulse sensor 3 - LE26 Steering wheel revolutions, clockwise. LE25 and x
26 will light up alternately, with overlap, when the
steering wheel is turned. Wheel turned anti-clock-
wise: LE25 lights up first. Wheel turned clockwise:
LE26 lights up first. If not: Check the sensor and
activator on the steering column
27 Rheostat 1 Fuel level x
28 Rheostat 2 Engine oil pressure 10 bar x
51 Rheostat 3 Gearbox oil pressure 25 bar x
9407
Technical Handbook Circuit Board Group 20 P. 26
LE1 Should always be lit,indicating a LE39 shows communication from the terminal
5V feed from the voltage and since ECU 1 is “slave” under ECU 2, LE39
transformer should be extinguished.
LE29 Not used LE40 shows communication to the terminal
LE30 Not used and should blink on all ECUs. If it lights contin-
LE39, LE40 show communication with the ECS ter- uously or is extinguished, the program will not
minal. (Applies to the ECU that is connected to start, i.e., something is wrong, for example, the
the terminal). EPROM or electrical supply.
ECU 1 circuit board

9407
Technical Handbook 01 - Automatic gear changing Group 20 P. 27
Module 01 - Automatic gear changing, is designed for gearboxes

with torque converters. The system controls up and down
changing of gears, simplifies operation and extends the service
life of the transmission equipment.
See electrical diagrams.
The system
Prevents the gears from being engaged if engine revolutions
exceed 1100 rpm
Prevents changing between forward and reverse gears if the
speed of the truck exceeds 3 kpm
Locks the present gear if the signal from the prop shaft rev-
olution sensor is incorret or absent
Reduces engine revolutions when changing to a higher gear
so that the speed of the truck remains constant
Disengages the gearbox if the operator brakes and the
speed of the truck is lower than 3 kph
Provides the required engine revolutions based on the posi-
tion of the accelerator pedal
Continually shows the currently engaged gear on the ECS
terminal display
Function
The point at which the gearbox changes gear is optimized to the
truck’s transmission equipment. The torque in the torque convert-
er initiates the change of gear. The system changes to a lower
gear when the torque is higher than a pre-programmed value -
and vice versa.
The operator can limit gear changes from 4 to 3, 2 or 1 by moving
the gear selector to the corresponding position. If the selector is
in the 2nd gear position, the system changes automatically be-
tween 1st and 2nd gears.
1
2
5
1. Injection pump motor
2. Electronic accelerator pedal
3. Sensor, gearbox disengagement
4. Sensor, engine revolutions
5. Sensor, propeller shaft revolutions
Fitting and adjustment, see group 40
4 01 Automatic gear changing, included units

9407
Technical Handbook 04 - Lever Steering Group 20 P. 28
04 Lever Steering
4ab 5
See electric diagrams.
The lever steering module is an electrical system for the steering
2 of the truck by means of a linear steering lever. The steered wheel
3
deflection is inversely proportional to the speed of the truck, i.e.,at
low speeds, the steered wheel deflection is greater than at higher
1 speeds. The system is available with or without wheel return.
With the wheel return system, when the operator releases the le-
ver the steered wheels return to a central position.
6 The steering valve is electronically controlled with one magnet for
right and one for left. This feeds the flow of hydraulic fluid to and
from the steering cylinder. The magnets receive analogue signals
from ECU 1.
The standard steering wheel is equipped with two inductive sen-
sors that sense any movement of the steering wheel. The sen-
sors are used to disconnect the lever steering function if the
operator is faced with an emergency situation. As soon as the
standard steering wheel is used, the lever steering disconnects.
This satisfies the
relevant safety requirements for a wheel-return system.
The sensor that returns the wheels to a central position is located
KL1405
under a hood adjacent to the steering axle’s left hand king pin.
The lever steering module includes a steering lever console .
9 24031
1. Steering lever 5. Switch for activating

2. Rocker switch F-N-R lever steering
3. Signal horn 6. Extra function
4. Switch for gear changing 7. Sensor, steering wheel
a. Up speed
b. Down 8. Control valve, steering
(excluded if the truck is 9. Steered wheel sensor
equipped with Module 01) 46-49 = Electrical connections
04 Lever steering, included units

9407
Technical Handbook 04 Lever Steering Group 20 P. 29
Lever steering characteristics

Also applies to Module 06, Mini-steering
The maximum wheel displacement from maximum lever move-
ment is determined by the speed of the truck. Wheel displace-
ment decreases when speed increases. The reduction in
BP1 displacement follows a curve with three break points, see dia-
100%
gram.
BP2 This curve determines the steering sensitivity of the truck. The
65% standard factory setting is as shown in the diagram, i.e., full wheel
displacement at 5 kph, 65% displacement at 10 kph and 40% dis-
BP3 placement at 15 kph. All of these levels corresponding to full
40%
movement of the steering lever.
It is possible to alter the break points and the displacement, see
INITIATION MODULE 04. One reason for altering lever steering
characteristics can be that a new operator would like less wheel
0 5 10 15 Km/hr. displacement at a certain speed - the truck feels “smoother” to
steer. A more experienced operator, on the other hand, may like
a quicker steering response, which allows a faster pace of oper-
Wheel displacement at full lever ation.
movement.
Values as per INITIATION 04, WARNING!
menus 3-7
If wheel displacement is set too high at higher speeds,
there is a risk of the truck tipping. Any alteration of lever
1 steering characteristics must be made with great care.
Alteration of the Steering lever output signal
It is possible to alter the output signal from the Steering Lever to
2 follow two different curves - linear or logarithmic
The logarithmic curve provides less sensitive steering.
7 7 In the ECS SERVICE Technical Handbook, under Initiation Mod-
8 ule 04, a description can be found as to how to choose between
8 the two curves.
3 Alteration of the Mini-steering device output signal
The number of turns that corresponds to normal steering wheel
6 movement can be set, see Technical Handbook ECS SERVICE,
5 Initiation Module 06.
4
1. Output signal Monitoring of steering lever & wheel angle sensor
2. Stop voltage If a fault occurs in the lever steering system - sensor, steering le-
3. Start voltage ver, cables - an alarm is generated by the ECS. Lever steering is
4. Middle position frozen, i.e., the wheels remain at the current steering angle and
5. Free-play zone the operator must therefore use the steering wheel. After such a
6. Lever movement fault, re-calibration must be carried out in accordance with the in-
7. Linear output signal structions in the Calibration section.
8. Logarithmic output signal
Checking the sensors and activator on the steer-

ing column
Two sensors on the steering column monitor steering wheel
movement. The senors are activated by an activator with four
cams on the steering column. See the illustration of included
units. When a certain movement of the steering wheel occurs, le-
LE25
ver steering is disconnected.
The sensors and activator must be regularly checked during
LE26 service. If a fault occurs with the sensors, there is a danger that
the truck will go straight forward.
1. Open ECU 1 so that the LEDs are visible.
2. Locate LE25 and LE26, see ECU 1 Circuit board.
Anti-clockwise turning: LE25 lights first
3. Turn the steering wheel and at the same time, check LE25 and
Clockwise turning: LE26 lights first LE26. They should light alternately, with a certain overlap, as
per the curve.
9407
Technical Handbook 06 Mini-Steering Group 20 P. 30
Fitting/Adjustment of wheel angle sensor

Applies only to wheel return system
1. Adjust the wheels so that they are parallel to the truck.
1 2 3 4 5
2. Remove the cover of the left hand steering knuckle.
3. Lift off the carrier 3.
4. Loosen the locking screw 4, remove the connections to the
potentiometer and lift it out.
5. Connect a multimeter between the centre pin of the potenti-
ometer and one of the outer pins.
6. Turn the potentiometer until the instrument shows 2,5 kohm.
Re-connect the potentiometer.
7. Slide the potentiometer back into the axle 5. Fit the carrier
and tighten the locking screw 4. Fit the cover and seal with
1. Cover
sealing compound.
2. Potentiometer Calibrate as per Technical Handbook ECS-SERVICE, Calibration
3. Carrier Module 04.
4. Locking screw
5. Axle
48 = Electrical connections
Module 06 Mini-Steering
The Mini steering module is an electrohydraulical system for
N.B. comfortable steering of the truck with the arm on the armrest. The
Module 06 Mini-steering has a great deal in steered wheels follow the position of the Mini steering device. If
common with Module 04 Lever steering. the operator releases the Mini steering device, both the steering
See section 04 Lever steering. device and the steered wheels remain in the set position.
The standard steering wheel is equipped with inductive sensors
that sense the movement of the steering wheel. The sensors dis-
connect the Mini steering if the operator is faced with an emer-
gency situation and starts using the standard steering wheel.
When the Mini steering is disconnected, the lamp in switch 2, see
below, is extinguished.
3 6
1. Mini steering device
2. Direction switch F/N/R. The lamp in the switch is alight when
the lever steering is activated
Forwards position = F. Centre position = N
2 Backwards position = R
b 3. Signal horn
1 4
a 4. Switches for gear changing, a=UP, b=DOWN
(Excluded if the truck is equipped with module 01 Automatic
gear changing) Press 4a to shift gears 1-2-3-(4) (once for
every gear) and 4b to shift down. The gear changing always
5 starts with gear 1 on starting and after the direction switch
has passed the N position.
5. Switch for activating Mini steering
Condition: The truck speed must not exceed 3 kph. If the
speed exceeds 3 kph it not possible to activate the Mini
steering. The lamp in switch 2 is alight when the Mini steer-
ing is activated
6. Extra function
KL1404
9407
Technical Handbook 07 - Monitoring Group 20 P. 31
Module 07 Monitoring
See electrical diagrams.
The monitoring module checks that the engine and gearbox op-
erate within reasonable limits and thereby prevents a major
breakdown from occurring. The module also monitors the correct
function of the different system components, such as sensors,
etc.
Values, such as oil pressure and temperature, that are of vital im-
portance when it comes to wear and tear and the risk of break-
down, are monitored on two levels. A red warning lamp lights and
an error message appears on the terminal display. If the reason
for the fault is not rectified, the system limits the truck’s functions.
The most serious faults lead to a reduction in engine revolutions.
DRD420-60S5
KL586C
10 11
8 1 6 5 7 9
1. Sensor, drive shaft revolutions 6. Sensor, gearbox oil temperature

2. Sensor, engine revolutions 7. Sensor, engine oil pressure
3. - 8. Sensor, coolant level
4. Sensor, brake pressure 9. Sensor, coolant temperature
5. Sensor, gearbox oil pressure and oil 10. Sensor, hydraulic fluid temperature
temperature 11. Sensor, fuel level
07 Monitoring, included units

9407
Technical Handbook 07 - Monitoring Group 20 P. 32
The following signals are monitored:

1. Battery level, min. <14.4 Volts
2. Engine oil pressure, min. level 1 <1.0 bar
3. Engine oil pressure, min. level 2 <0.5 bar
4. Coolant temperature, max. level 1 >98°C
5. Coolant temperature, max. level 2 >103°C
6. Gearbox oil pressure, min. level 1 <12-15 bar
(dependent on selected transmission data kit)
7. Gearbox oil pressure, min. level 2 <10 bar
8. Gearbox oil temperature, max. level 1 >130°C
9. Gearbox oil temperature, max. level 2 >134°C
10. Fuel level, min.
11. Hydraulic fluid temperature, max. >100°C
12. Coolant level, min.
13. Operating time, max. service interval period, shows the time
remaining to the next service and generates an alarm when
operating time has been exceeded.
14. Brake pressure
The following sensors are checked:

1. Engine revolutions
2. Gear lever
3. Accelerator pedal
4. Fuel injection pump motor
5. Fuel gauge
6. Gearbox oil pressure
7. Engine oil pressure
8. Engine oil temperature
9. Gearbox oil temperature
10. Hydraulic fluid temperature
With non-permissible levels of any of the signals, an alarm is ac-
tivated - a red warning lamp lights and the terminal display shows
in clear text which signal is incorrect. If any signal begins to ap-
proach level 2, engine revolutions are reduced, following a de-
fined curve, to a lower rate of rpm.
The different levels are pre-programmed into the ECU and cannot
be altered.
9407
ECU 2 Functions
Pin no. Signal LED Function
ECU 2
S2
8 Digital IN I/O LE14 Working lights, top-lift
9 ” LE17 Control lever, side-shift Right (15)
10 ” LE20 Control lever, side-shift Left (16)
11 “ LE23 Control lever, vertical lift
31 “ LE13 Control lever, twist-locks release (8-9)
32 “ LE16 Twist-locks locking/Auto
33 “ LE19 Control lever, doors OK
34 “ LE22 Warning for overloading of steering axle
55 “ LE15 Sensor, activating stop at 30-35’
56 “ LE18 Sensor, activating locking, tilt
57 “ LE21 Overload, mechanical system
58 “ LE24 By-pass connection of safety system
2 Digital OUT PNP I/O LE6 Activating top-lift/loading of hydraulic pump
24 “ LE10 Indication of alignment, on steering wheel panel
25 “ LE7 Indication of twist-locks released, on steering wheel panel
26 “ LE8 Indication of twist-locks locked, on steering wheel panel
48 “ LE9 Regeneration BOOM OUT
49 “ LE11 Regeneration LIFT
50 “ LE12 Blocking valves, lift cylinders
22 Digital OUT PNP/NPN
46 “ Buzzer, overload and warning of overloaded steering axle
40 Analogue IN 0-10V Boom length
42 “ Control lever LIFT/LOWER P1
64 “ Pressure sensor, right lift cylinder, piston side (mod 60)
65 “ Pressure sensor, right lift cylinder, piston rod side (mod 60)
66 “ Control lever, BOOM OUT/IN P2
67 “ Control lever, ROTATION P3
52 “ Boom angle Min=2V, Max=8V
43 Analogue IN 4-20 mA Pressure sensor, right lift cylinder, piston side (mod 57) +
Pressure sensor, left lift cylinder, piston rod side
(mod 52, 60)
63 “ Pressure sensor, left lift cylinder, piston side (mod 50, 60)
27 Analogue IN 0-196 OHM End position BOOM OUT (mechanical system)
28 “ End position BOOM ANGLE (mechanical system)
51 “ Separate bottom lift (disconn. of tw-locks and 20-40’ funct.)
6 Analogue IN 70-120°C
7 “ -20-120°C
30 By-pass of rotation stop
53 “ 70-120°C
1 Analogue OUT pwm PNP1 LE5 Boom IN
3 I1 Boom LIFT
4 I2 Boom LOWER
5 “ PNP4 LE4 Boom OUT
17
18
35 Pulse transmitter 1
59 Pulse transmitter 2
36 Digital IN Rotation stop, counter-clockwise
60 Digital IN Rotation stop, clockwise
23 Battery plus 24V
13 Battery plus 24V
37, 70, 12 Battery minus
9407
Technical Handbook Circuit board Group 20 P. 34
A B
LE1 Should always be lit,indicating a LE39 shows communication from the terminal and
5V feed from the voltage transformer should always blink.
LE40 shows communication to the terminal and
A Extra circuit board should blink on all ECUs. If it lights continuously
B Switches, all should be in the ON postion or is extinguished, the program will not start,
i.e., something is wrong, for example, the
EPROM or electrical supply.
ECU 2 circuit board

9407
Technical Handbook Installation boom Group 20 P. 35
X410
KL1533b KL1534
KL1533a
KL1535
791 Electronic central unit for top-lift, KDU

1. 10 pole connection box
KDU 791 2. 42 pole connection box
3 3. Indicator lamp POWER, green.
4 lit with 24V feed
5 4. Indicator lamp SYSTEM, green
6 lit when the program registers a
system voltage of 20-29 V
5. Indicator lamp MODE, yellow
Blinks once a second if the communication
with ECU 2 via CAN bus is correct
6. Indicator lamp STATUS, red
lit when any fault is active.
See error code on the ECS display.
X70 Connection block on boom mounting
KL1536 X400 Connection block
X401 Connection block
X405 Connection block
2 1 X410 Box with relays for emergency stop.
For safety reasons, there are two relays connected
N.B. in parallel. The relays are controlled from the emer-
The permitted load on KDU 791 is limited. gency switch, see 36 on the servo diagram (S)
Therefore, connection of extra equipment 562 Indicator lamp, red, TWIST-LOCKS RELEASED
to the KDU is not allowed. 563 Indicator lamp, green, TWIST-LOCKS LOCKED
564 Indicator lamp, orange, ALIGNMENT
Electrical installation ECS, boom

9407
Technical Handbook Elservo Group 20 P. 36
El-servo
The el-servo system includes:
Control lever functions for boom movement
All attachment functions
Overload protection
Cab movement
Support jacks
The references in the following descriptions relate to components
in the el-servo diagrams (diagrams marked S), if nothing to the
contrary is stated.
El-servo (S) A38630.0100 (ECU 2)
El-servo (S) A38630.0200 (ECU2 + ECU 3)
For top-lift circuits, refer to separate diagram.
When following the circuit descriptions, first select an S diagram

and an top-lift diagram that correspond to the machine in ques-
tion.
Example: S7 shows component no. 7 on the el-servo diagram,

i.e., the main valve in the hydraulic system.
S50-S65 show the connectors for ECU 2 under operator’s seat.
ANA IN = Analogue IN signal
ANA OUT = Analogue OUT signal
DIG IN = Digital IN signal
DIG OUT = Digital OUT signal
LE1-LE43 = LEDs, with green or red light. These can be located
on the overview illustration of the ECU 2 circuit board.
9407
Control lever
The control lever regulates electrical signals which operate elec-
trohydraulic converters which in turn feeds hydraulic servo pres-
sure to the main valve sections.
The lever handle is equipped with potentiometers P1–P4 and four

finger-tip controlles switches T1–T4.
The plus feed from the control unit is delivererd via sliding shoes
when manoeuvring the machine.
When manoeuvring, the potentiometer setting is altered, and

thus the output signal, in proportion to the lever movement. The
output signal is amplified in the control unit ECU 2 and thereafter
used for controlling the hydraulic servo output from the converter.
T1 Side shift
1=Left, 2=Right
T2 Unlocking of twist-locks
T3 1=Locking of tilt
2=Locking of levelling
T4 Vertical lift
P1 Lift/Lower
P2 Boom out/in
P3 Rotation
P4 Tilt (Optional)
1. TILT (analogue) 16. SIDE-SHIFT RIGHT/20-40 outwards

4. Boom OUT/IN (analogue) 17. Locking of pile-slope
8. LIFT/LOWER (analogue) 18. Locking of forward tilt
9. 0-ref. LIFT, EXTENSION, ROTATION 19. Vertical lift
10. 10 V feed LIFT, EXTENSION, ROTATION 20. Twist-locks release
11. ROTATION CLOCKWISE/ANTI-CLOCKWISE
(analogue)
14. SIDE-SHIFT LEFT/40-20 inwards
15. Feed 24V
9407
Converter
The converter is a electrically controlled pressure reducing valve
for the remote control of hydraulic functions. The output signal is
a porportional hydraulic servo pressure which is used to control
the spools of the main valves.
The converter consists of a solenoid and a pilot valve. It is con-
nected to the main valve spool actuator block.
The solenoid exerts a proportional force on the pilot valve. The
end of the unit is provided with a vent screw and a pushbutton for
emergency manual operation.
The control pressure output delivered by the pilot valve to the
spool actuator of the main valve is practically proportional to the
input current.
The pilot valve is closed in the neutral position.
1. Vent screw
2. Push button, manual operation
3. Solenoid
4. Pilot valve
5. Main valve
6. Spool actuator
7. Control current
8. Inlet servo pressure
9. Return servo pressure
A given control current is results in a definite

servo pressure at the spool actuator
Converter
9407
Control lever feed

1. The LIFT/LOWER, BOOM OUT/IN and ROTATION functions
are fed with 10 V from ECU2, contact S2 (70 pole junction
box on ECU2), pin 45 of connector S55 pin 12. From there
via cable S33 to the D sub-contact S42 on the control lever
S32.
2. Earth reference to the 10V is fed from S2 pin 44 to connector
S55 pin 13. From there via cable S33 to S42 on the control
lever S32.
3. When the lever is in the neutral position P1, P2, P3 and P4
supply 5V to S42 and from there, on to connector S55. The
end positions provide 0V and 10V respectively.
4. The SIDE-SHIFT, LOCKING TILT/PILE SLOPE, STRAIGHT
LIFT AND RELEASE TWIST-LOCKS functions are fed with
24V from fuse 3 of the central electrical unit S1. Via the cen-
tral electrical unit’s connector 32 pin 3 to the el-servo con-
nector S55 pin 11. Via cable S33 to S42 pin 11. From there,
feed to switches T1, T2, T3 andT4.
5 6 7
2
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 S2
4
1. Control lever 6. CAN bus for communication between ECUs 1-2-3
2. D sub-contact for control lever(S42) 7. Relays
3. Cable (S33) S2. 70 pole contact for ECU2 (S2)
4. Connectors for ECU2 under operator’s seat
5. Earth connections
Technical Handbook
ContChamp DRD-S
S42
Cable S33 of the el-servo system
ECU 2
Elservo
KL 1547
FB = Front legs, bottom lift U = Lamp, support jacks up 30 = Stop at 30-35’

BB = Rear legs, bottom lift VS = By-pass connection, rotation stop TW = Twist-locks
K = Clamping TP = By-pass connection, Max hight/Min LC-dist S42 = D-sub contact at control lever
HS = Cab movement N = Lamp, support jacks down
SB = Support jacks S = By-pass connection safety system
9407
Group 20 P. 40
02-03
9407
Sensor in the feed line to left lift cylinder. Pressure sensors right and left lift cylinders
Out signal: 4-20 mA N.B. The pressure sensors are different for different modules.
(768-10 and 11 are identical. 768-12, 13 and 14 are identical)
See also the el-servo diagrams (S).
Sensor in the feed line

to right lift cylinder.
Out signal: 4-20 mA
N.B. Module 57, apart

from sensor 768-14,
also includes sensor
768-12 from Module 50
Module 50 Module 57
Sensor in the feedline and returnline to

right and left lift cylinder.
Out signal right sensor: 1-10 V
Out signal left sensor: 4-20 mA
Module 60 (52)
9407
LIFT
See el-servo diagram (S)
S7 1. Control lever used for LIFT, P1 gives a 5-9V analogue signal
via 42.8, via cable S33 to X55.1
2. ANA IN S2.42. No indication in ECU2 for analogue IN sig-
nals.
3. ANA OUT S2.03. 24V, varies with lever position.
4. X63.1
5. Main valve converter S7.1 opens for servo pressure.
Simultaneous feed of servo pressure to S7.8
6. Main valve sections S7.1 and S7.8 opens for LIFT
S7.1
KL700
Conditions:
1. DIG IN S2.7. LE19 lit, which means:
Cab in rear position
If the cab is in the forward position, doors closed
With remote control - contact OK
Twist-locks either LOCKED or RELEASED
Signal from 791. Control: DIAGNOS, menu 4(8)
X69 No front overload, no steering axle overload. (Module 50:
LE21 shall be lit. Module 60: No overload indication on the
display)
Regeneration, LIFT
1. 24V to X62.8
2. Connector X69.8, see illustration
KL701-D
Module 50
Conditions for regeneration:
Connects when pressure in lift circuit <85 Bar
Disconnects when pressure is approx. 185 Bar
3. Pressure sensor 768-12.3 in lift cylinder feed IN 24 V, see il-

lustration
4. Pressure sensor 768-12.2 OUT, 4-20 mA, corresponds to 0-
250 bar pressure in lift circuit
5. X69.5
6. X62.5
7. ANA IN S2.63 (no indication)
(cont’d p.14 next page)
.
KL1418c
9407
Module 60 (or module 52)

Connects when pressure in lift circuit <85 Bar
Disconnects when pressure is approx. 185 Bar
8. Feed right sensor: 24V over X69.1 to 768-10.3 and 768-11.3.

Ref.voltage =0V from X69.2.
9. Feed left sensor: 24V over X69.1 to 768-12.3 and 768-13.3
10. Out signal right pressure side 768-10.2: 1-10V to S19.3
to X62.3, to S2.64 ANA IN (no indication)
11. Out signal right return 768-11.2: 1-10V to X69.4
12. Out signal left pressure side 768-12.2: 4-20 mA to X69.5
KL1418b to X62.5, to S2.63 ANA IN (no indication)
13. Out signal left return 768-13.2: 4-20 mA to X69.6
KL1418a
Modules 50,52,60
14. DIG OUT S2.49. LE11 lit (Lever movement >50%)
15. X62.8
16. X69.8
17. Regeneration valves S14, right and left, open and regenera-
tion starts.
The regeneration starts with a time-delay which is set in the
SET UP EL-SERVO ECU 2, see Technical Handbook ECS
SERVICE.
18. Earth signal back via X69.2
19. S62.2 to earth
KL702-C
S14
9407
LOWER
S7 S7.2 See el-servo diagram (S)
1. Control lever used to LOWER, P1 gives a 5-1 V analogue

signal via D sub-contact S42.8, via cable S33 to X55.1
2. ANA IN S2.42. No indication in ECU2 for analogue IN sig-
nals.
3. DIG OUT S2.50. (Opens the lift cylinders’ blocking valves
S15). LE12 lit.
4. 24 V to X62.7.
5. X69.7
6. 24 V to the blocking valves S15, right and left, that open.
KL700
7. ANA OUT S2.04 to X63.2

8. Varies 24V between X63.2 and X63.5.
9. Main valve converter S7.2 opens for servo pressure at the
same time servo pressure is fed to S7.8.
10. Main valve section S7.2 and S7.8 opens for LOWER
Conditions:
X69 No alignment indication from attachment, LE14 extin-
guished.
Dead man’s grip activated, LE19 lit.
No front overload, no steering axle overload (Module 50:
LE21 extinguished. Module 60: No overload indication on the
display).
KL701-D
Emergency lowering
In the event of an electrical fault that leads to the blocking valves
on the lift cylinders being unable to be opened, i.e., the boom
cannot be lowered, there is an emergency lowering function.
On the solenoid S15 for the blocking valves (right and left lift cyl-
inders) there is a knob, A in the illustration. Pull this straight out
and turn it one quarter turn and the boom will slowly lower.
NOTE: The emergency lowering applies to unloaded machine

only.
KL702-C
S15 A
9407
BOOM OUT
1. Control lever used to BOOM OUT, P2 gives a 5-9 V analogue
signal via S42.4, via cable S33 to X55.2
2. ANA IN S2.66.
S7 3. ANA OUT S2.05. LE4 lights depending on voltage.
4. X63.4
Simultaneous feed of servo pressure to S7.6.
6. Main valve sections S7.3 and S7.6 opens for BOOM OUT.
Conditions:
1. DIG IN S2.33, LE19 lit.
Safety system not by-passed (S37)
No front overload. (Module 50: LE21 lit. Module 60: no over-
KL700
load indication on the display).
S7.3
Regeneration, see next page.

9407
Regeneration, BOOM OUT

X69 See el-servo diagram (S)
1. 24V to X62.8
2. Connector X69.7, see illustration.
Module 50
Connects when the pressure in lift circuit <85 Bar
Disconnects when the pressure is approx. 185 Bar
.
3. Pressure sensor 768-12.3 for lift cylinder feed IN=24 V, see
illustration
4. Pressure sensor 768-12.2 OUT=4-20 mA, corresponds to 0-
250 bar pressure in the lift circuit.
5. X69.5.
6. X62.5.
KL1418c 7. ANA IN S2.63 (No indication)
(cont’d p.14 next page)
Module 60 (or module 52)

Connects when the pressure in lift circuit <85 Bar
Disconnects when the pressure is approx. 185 Bar
8. Feed right sensor: 24V over X69.1 to 768-10.3 and 768-11.3.

Ref.voltage =0V from S19.2.
9. Feed left sensor: 24V over X69.1 to 768-12.3 and 768-13.3
10.Out signal right pressure side 768-10.2: 1-10V to X69.3
11.Out signal right return 768-11.2: 1-10V to X69.4
KL1418b 12.Out signal left pressure side 768-12.2: 4-20 mA to X69.5
13.Out signal left return 768-13.2: 4-20 mA to X69.6
KL1418a
9407
Modules 50, 52, 60

14.DIG OUT S2.48. LE9 lit
15.X61.4
16.Connector X67.4, see illustration
X67
KL704-D
17.Connector X68.4, see illustration
X68
KL705
18. Regeneration valve S18 opens and regeneration

starts
The regeneration starts with a time-delay which is set in the
SET UP EL-SERVO ECU 2, see Technical Handbook ECS
SERVICE.
19.Earth signal to X68.
S18
KL703
9407
BOOM IN
See diagram S.
1. Control lever used for BOOM IN, P2 gives a 5-1 V analogue
S7 signal via S42.4, via cable S33)
2. X55.2.
3. ANA IN S2.66.
4. ANA OUT S2.01. LE5 lit
5. X63.3.
Simultaneous feed of servo pressure to S7.5.
7. Main valve sections S7.4 and S7.5 opens for BOOM IN.
Conditions:
KL700
S7.4 DIG IN S2.33, LE19 lit.

Module 60: No steered axle overload indication on the dis-
play.
9407
Rotation clockwise
X69
Electrical diagram attachments
(A38414.0100 Top-lift)
1. P3 signal 5-9 V out via S42.11.

2. X55.3.
3. ANA IN S2.67 (No indication)
4. ANA OUT S2.2 (LE6 lit)
5. X62.10.
6. X69.10.
7. Activate solenoid valve, top-lift S73 (loading of hydraulic
pump).
KL701-D
8. Signal from ECU 2 via CAN bus to KDU Attachment 791.
9. DIG OUT 791.2.2 to 6008
REF OUT 791.2.16 to 6008
Conditions:
6009
LE19 lit.
6008
No front overload. (Module 50: LE21 extinguished. Module
60: No overload indication on the display).
Rotation anti-clockwise
1. P3 signal 5-1 V out via S42.11.
2. X55.3.
3. ANA IN S2.67 (no indication)
4. ANA OUT S2.2 (LE6 lit)
5. X62.10.
6. X69.10.
7. Activate solenoid valve top-lift S73 (loading of hydraulic
pump).
8. Signal from ECU 2 via CAN bus to KDU Attachment 791.
9. DIG OUT 791.2.3 to 6009
REF OUT 791.2.17 to 6009.
Conditions:
KL727-D
LE19 lit.
No front overload. (Module 50: LE21 extinguished. Module
60: No overload indication on the display).
N.B.
In attachment function descriptions, the term CAN bus
occurs. The CAN bus in question effects communication,
in the form of a digital pulse stream, between the ECU 2
and 791 computers. These signals cannot be measured
without advanced specialised equipment.
9407
Feed, sensor
1. DIG OUT from 791.2.11 to X402.1, X403.1 and 404.1.
7202L 7202R
2. Earthing reference REF OUT from 791.2.38 to X402.2,
X403.2 and 404.2.
X404
T5655870-1
X403
X402
7203L 7203R
Indicator, ALIGNMENT
1. Signal from 7202R to X403.3 to X403.3.
2. DIG IN 791.2.40.
4. DIG IN 791.2.26.
5. Signal from 7202L to X404.3 to X402.7.
KL1535 6. DIG IN 791.2.13.
8. DIG IN 791.2.27.
9. Points 1-8 satisfied, gives DIG OUT 791.2.29 to X405.2.
10. Indicator lamp ALIGNMENT lit.
Signal from 791 via CAN bus to ECU 2.
Control: DIAGNOS 4(8).
9407
Twist-locks, automatic locking

1. Feed +24V from central electrical unit S1 connector X38.7.
X69 Condition: Parking brake RELEASED.
2. X51.7.
3. X56.11.
4. Signal in to switch S34, pin 3
5. Switch S34 in AUT position, signal out from pin 7
6. X56.1.
Condition: Signal for alignment from 791. Control: DIAGNOS
menu 4(8). Or signal from switch S37 for by-pass of safety
system (DIG IN S2.58, LE24 lit).
8. DIG OUT S2.2, LE6 lit.
9. X62.10
10. X69.10.
KL701-D 11. Activate solenoid valve, top-lift (loading of hydraulic pump).
12. Signal from ECU 2 via CAN bus to 791.
13. DIG OUT from 791.2.37 to 6039791.2.32 to 6040.
REF OUT from 791.2.36 to 6040.
6040 14. Hydraulic feed to twist-lock cylinder that turn the twist-locks
6039 to locked position.
Twist-locks, manual locking

1. Feed +24V from central electrical unit S1 fuse 3 to connector
X32.1.
2. X50.1.
3. X56.4.
4. Main switch S36, on through loop 567 via S35.
5. Switch S34 in MAN position, signal out from pin 2 as for point
6 above.
Twist-locks, release
1. Control lever switch T2 used.
2. 24 V to S42.20.
3. X55.10.
Condition: Signal for alignment from 791. Control: DIAGNOS
menu 4(8). Or by-pass of safety system with S37 (DIG IN
S2.58, LE24 lit) and no side-shift, i.e., no signal in to S2.09
(LE17 extinguished) or S2.10 (LE20 extinguished).
KL727-D
6. X62.10
7. X69.10.
8. Activate solenoid valve, top-lift (loading of hydraulic pump).
9. Signal from ECU 2 via CAN bus to 791.
10. DIG OUT from 791.2.23 to 6039.
REF OUT from 791.2.37 to 6039.
11. Hydraulic feed to twist-lock cylinder that turns the twist-locks
to the open position.
9407
Indicator, twist-locks locked

7204L 7205R
2. DIG IN 791.2.24.
4. DIG IN 791.2.23.
X404 5. Points 1-4 satisfied gives DIG OUT 791.2.39 to X405.3
6. Indicator lamp 563 Twist-locks locked lit.
T5655870-1
X403
X402
7205L Indicator, twist-locks released

7204R 1. Signal from 7204R to X403.4 to X402.4.
2. DIG IN 791.2.41.
4. DIG IN 791.2.22.
5. Points 1-4 satisfied gives DIG OUT 791.2.25 to X405.1
6. Indicator lamp 562 Twist-locks released lit.
KL1535
9407
Side-shift left
1. Control lever switch T1 is used for side-shift left.
X69 2. 24 v to S42.14.
3. X55.7.
Condition: S2.11 - LE23 extinguished, or S2.56 - LE18 lit,
and S2.31 - LE13 extinguished.
6. X62.10.
7. X69.10.
8. Activate solenoid valve top-lift (loading of hydraulic pump).
9. Signal out from ECU 2 via CAN bus to 791.
10. DIG OUT 791.2.31 to 6020
REF OUT 791.2.35 to 6020
11. 6020 opens for hydraulic feed to the side-shift cylinder. Side-
KL701-D shift left.
Side-shift right
1. Control lever switch T1 is used for side-shift right.
6021 2. 24 v to S42.16.
6020 3. X55.8.
Condition: S2.11 - LE23 extinguished, or S2.56 - LE18 lit,
and S2.31 - LE13 extinguished.
6. X62.10.
7. X69.10.
10. DIG OUT 791.2.30 to 6021
REF OUT 791.2.34 to 6021
11. 6021 opens for hydraulic feed to the side-shift cylinder. Side-
shift right.
KL727-D
9407
Length adjustment OUT

1. Control lever switches T1 + T4 are used.
X69
T1
2. T1 to the right.
3. Signal out to S42.16.
4. X55.8.
T4
6. T4 depressed.
8. X55.9.
KL701-D
10. DIG OUT S2.2. LE6 lit.
11. X62.10
12. X69.10
6019 14. Signal out from ECU 2 via CAN bus to 791.
6018 15. Conditions: Signal twist-locks released. Control: DIAGNOS
4(8).
Or signal for bypass connection of safety system with S37
(DIG IN S2.58, LE 24 lit)
16. DIG UT 791.2.4 to 6018
REF UT 791.2.18 to 6018
17. 6018 opens for hydraulic feed to the cylinder, length adjust-
ment OUT begins.
Length adjustment IN
1. Control lever switches T1 + T4 are used.
T1
2. T1 to the left.
4. X55.7.
T4
6. T4 depressed.
KL727-D 7. Signal out to S42.19.
8. X55.9.
10. DIG OUT S2.2. LE6 lit.
11. X62.10
12. X69.10
15. Conditions: Signal twist-locks released. Control: DIAGNOS
4(8).
Or signal for bypass connection of safety system with S37
(DIG IN S2.58, LE 24 lit)
16. DIG OUT 791.2.5 to 6019
REF OUT 791.2.19 to 6019
17. 6019 opens for hydraulic feed to the cylinder, length adjust-
ment IN begins.
9407
End-position damping for IN and OUT length

adjustment
1. Feed, sensor: DIG OUT 791.2.11 to X402.1
Reference voltage, sensor: REF OUT 791.2.38 to X402.2
2. Signal from 769 to X402.11
3. DIG IN 791.2.12 gives lowered speed at both end positions.
X402
769
T5655870-2
769 Sensor, damping

9407
Technical Handbook 50 Mechanical Overload Protection Group 20 P. 56
Module 50 Mechanical Overload Protection

The mechanical overload protection function:
monitors the forward load and generates an alarm on the
ECS terminal.
monitors the rear load on the steering axle.
controls the regeneration system for LIFT and BOOM OUT.
controls the end position damping for LIFT, LOWER and
BOOM OUT.
The mechanical overload protection system consists of (see illus-

tration below)
A pressure sensor, 768-12, in the left lift cylinder feed line.
Five inductive sensors for monitoring boom angle, boom ex-
tension and end position.
An inductive sensor on the steering axle suspension to indi-
cate forward overload.
S72 S4
S23a
S23b
S24
KL1051
S22
S21
ECU 2
DRD420-60S5
S2
S20
KL1418c
KL1058-C
768-12. Pressure sensor, feed line left See page 58 S24. Sensor, BOOM OUT
lift cylinder (page 41) S20. Sensor, steering axle overload S72. Relay box, relays for determina-
S21. Sensor, boom angle tion inner or outer boom position
See servo diagram (S) S22. Sensor, end position boom angle
S2. ECU2 S23a. Sensor, boom inner position
S4. ECS terminal S23b. Sensor, boom outer position
9407
Overload indicator
1. Normal operating condition.

1.
2. Steering axle overload
Monitored by two inductive sensors, 24 for boom extension
and 21 for boom angle. When boom extension is less than
1.5 m, the boom angle is greater than 35° and 3rd or 4th gear
is engaged both sensors interrupt and generate an alarm for
overload of the steering axle. A red lamp blinks and the buzz-
2. er sounds intermittently.
3. With forward overload, i.e., when approximately 33% of the
safety margin remains (remaining counter-weight), the red
warning light on the ECS terminal lights up, a buzzer sounds
and the ECS terminal display shows “overload”. At the same
time, the system interrupts the LIFT, LOWER and BOOM
OUT functions. Of these, it is possible to make a by-pass
3.
connection of the LOWER function, using the by-pass switch
on the side of the hydraulic console in the cab.
The signal for forward overload is supplied by the sensor on the

steering axle suspension. The rear steering axle suspension in-
cludes a flexibly mounted hinged linkage with pre-determined
1 amount of “play”. When the permitted load is exceeded and the
3 steering axle is the only remaining counter-weight, this play in-
creases the distance between the sensor and the angle-iron that
activates the sensor. When this play is at its maximum, the sen-
sor’s signal ceases, an overload warning is generated and LIFT,
LOWER and BOOM OUT functions are interrupted.
This means that the machine may become locked in position.To
rectify such a situation it is possible to make a by-pass connection
with the help of the by-pass switch located on the side of the hy-
S20 draulic console in the cab. Once the by-pass connection is made,
2 the BOOM IN and LOWER functions can be used.
Regeneration
Regeneration operates on the LIFT and BOOM OUT functions
and is a system that leads return fluid from the piston sides of the
4 lift and extension cylinders directly back to the cylinder feed. The
system is activated at hydraulic pressures lower than 8.5 MPa
and considerably increases the piston speed by increasing the
flow of hydraulic fluid. More rapid boom movement can thereby
be achieved on an unloaded machine. The greatest load which
will still allow the regeneration system to be activated is, for ex-
1. Chassis ample, an empty container in the first row. With a greater load,
2. Angle-iron activator, activates sensor LIFT and BOOM OUT function as normal.
Play > 5 mm sensor breaks The regeneration starts with a time delay which is set in the SET-
3. Hinged linkage UP EL-SERVO menus, see Technical Handbook ECS SERVICE
4. Steering axle
S20. Inductive sensor for overload
End position damping
End position damping reduces the speed of LIFT/LOWER and
BOOM OUT/IN functions in order to reduce jolting at stop posi-
tions.
Sensors 22 for boom angle and 23a+b for boom extension are ac-
tivated before the end positions. The system feeds out less cur-
rent to the main valves which provide a reduced hydraulic flow
and thereby, a reduction in speed.
9407
S20
S72
S21
S22
S23a
S23b
S24
S18
768-12.Pressure sensor, S23a.Sensor, boom inner position

feed line left lift cylinder S23b.Sensor, boom outer position
See also, page 40. S24. Sensor, BOOM OUT
S72. Relay box, relays for determination
See also page 40. inner or outer boom position
S18. Regeneration valve BOOM OUT
S19. Terminal bar
S20. Sensor, steering axle overload
S21. Sensor, boom angle
S22. Sensor, end position boom angle

9407
Technical Handbook 51 Vertical Lift Group 20 P. 59
Module 51, vertical lift for Module 50

Module 51 Vertical lift:
steers LIFT/LOWER and BOOM OUT/IN and coordinates
both of these functions so that the load moves completely
vertically both up or down.
numerically displays WEIGHT, BOOM EXTENSION,
LC-DISTANCE and BOOM ANGLE.
displays the Module 50 overload menus, as shown in the ad-
jacent illustration. The menus vary if additional modules are
selected, for example, Printer, Container counter, Automatic
gear changing.
Module 51 consists of: (see illustration below)

A potentiometer type length sensor S17 with wire to indicate
boom extension length.
An oil-filled potentiometer angle sensor S16 that indicates
the lift angle of the boom.
S16 and S17 replace S21, S22, S23a+b, S24 and S72 from
LC-Distance = 3.80 m, Distance between the module 50.
centre of the drive axle and the centre of When Module 51 is installed, ECU 2 must be initiated. Con-
gravity of the load
tact Kalmar to obtain the necessary parameters.
S4
S17
S16
DRD420-60S5
ECU
S2
2
KL1060-C
Ses servo diagram (S) See group 20 page 65

S2. ECU 2 S16 Angle sensor
S4. ECS terminal S17 Length sensor
9407
Technical Handbook 52 Vertical Lift + Balance Group 20 P. 60
Module 52, Vertical Lift + Balance for Module 50
Module 52 Vertical lift + Balance

steers LIFT/LOWER and BOOM OUT/IN and coordinates
both of these functions so that the load moves completely
vertically both up or down.
numerically displays WEIGHT, BOOM EXTENSION,
LC-DISTANCE and BOOM ANGLE.
numerically displays L-TP and current load in tons.
Note that graphic load indicator only appears on module 60.
displays the Module 50 overload menus, as shown in the ad-
jacent illustration. Overload is indicated by sensor S20 i the
steered axle suspension. The menus vary if additional mod-
ules are selected, for example, Printer, Container counter,
Automatic gear changing.
Module 52 consists of: (see illustration below)

A pressure sensor 768-10, 11, 12, 13 in each of the lift cyl-
linder lyftcylinderns feed and return line.
L-TP = 3.0 m, distance between the A potentiometer type length sensor S17 with wire to indicate
front edge of the wheels and boom extension length.
the centre of gravity of the load An oil-filled potentiometer angle sensor S16 that indicates
LC-DISTANCE = 3.80 m, distance S16 and S17 replace S21, S22, S23a+b, S24 and S72 from
between the centre of the drive module 50.
axle and the centre of gravity of
the load) When Module 52 is installed, ECU 2 must be initiated. Con-
tact Kalmar to obtain the necessary parameters.
S4
S17
S16
DRD420-60S5
ECU 2
S2
KL586C
KL1062-C
768-10, 11, 12, 13 Pressure sensor, left

and right lift cylinder, feedline and return
line. See page 41 Pressure sensor.
See servo diagram (S)

S2. ECU 2
S4. ECS terminal
KL1418a
See page 65 KL1418b
S16. Angle sensor

S17. Length sensor
9407
Technical Handbook 57 Hydraulic Balance Group 20 P. 61
Module 57 Hydraulic Balance

The hydraulic balance is included in the ECU 2 el-servo system.
The signal to the system comes from the 768-12 pressure sensor
in the left lift cylinder feed and from 768-14, right cylinder.
1. Calibration of the balance must be carried out in accordance

with the instructions in ECU 2 SETUP, points 20 and 21
2. Connect a loaded container to the machine
KL1418c KL1418d
3. Extend the boom until the red lamp lights.

4. Lift the boom approx. 20 cm over the position where the red
flags on the left lift cylinder are aligned with each other.
5. Lower the boom until the red flags are exactly aligned with
each other.
(By first lifting the boom too high and then lowering it to the
correct position, the regeneration system is prevented from
building up pressure that can affect the measurement)
6. Press the button for weighing

= the vertical lift button on the control lever
7. The result is shown on the ECS terminal display
KL1412
1. Inductive sensor for activation of red

lamp
2. Red lamp for weighing position
KL1419 3. Feed from the attachment lamp panel
2 768-12 Pressure sensor in the feed line
1 to left lift cylinder.
768-14 Pressure sensor in the feed line
to right lift cylinder.
9407
Technical Handbook 59 Limitation Height/Lc-distance Group 20 P. 62
Module 59 Limitation Height/LC-distance

for module 50/60
In certain cases it may be necessary to limit how high the boom
can be lifted, for example, for operations in areas with overhead
power lines, bridges, traverses, etc, or how close to the cab the
load can be moved.
The pre-set limitation of height or Lc-distance, A on the adjacent
illustration, can be by-passed using the switch on the hydraulic
control panel (S71)
The switch must be continually pressed in whilst the boom (height
limitation) moves through the area B (700 mm) or the load (limi-
tation of Lc-distance) moves inside limitation A.
Above height C (height limitation), the system functions as nor-
mal. In front of limitation A (limitation of Lc-distance) the system
functions as normal.
In parallel with switch S71, the switch for by-passing the safety
system (located on the side of the hydraulic control panel) can
also be used.
Module 59 consists of, see illustration below
Switch S71 for by-passing the limitation system (height or
Lc-distance)
boom extension length.
An oil-filled potentiometer angle sensor S16 that indicates
S16 and S17 replace S21, S22, S23a+b, S24 and S72 from
C
module 50.
When Module 59 is installed, the limitation A must be set,
see Technical Handbook ECS SERVICE, CALIBRATION
MODULE 60.
S4
S17
S16
ECU
S2
2
DRD420-60S5
S71
KL1093-C
See servo diagram (S) See page 65 S71 Switch, height limitation
S2.ECU 2 S16 Angle sensor system by-pass
S4.ECS-terminal S17 Length sensor
9407
Technical Handbook 60 Electronic Overload Protection Group 20 P. 63
Module 60, Electronic overload protection

The electronic overload protection:
monitors the front load and continually shows the results via
two different menus on the ECS terminal display, switch be-
tween menus using the arrow RIGHT/LEFT keys
monitors the rear load on the steering axle
controls the regeneration system for LIFT and BOOM OUT
includes vertical lift, as standard
includes completely electronic balance, as standard,
measurement precision ±0.5 tons over 80% of the complete
measurement area
controls the end position damping of LIFT/LOWER and
BOOM OUT/IN
Electronic overload protection (see illustration below) consists of:
A pressure sensor 768-10, 11, 12, 13 in each lift cylinder
feed and return lines
the length of extension.
An oil-filled potentiometer type angle sensor S16 to indicate
S4
S17
S16
1
S2 2 S
S3
DRD420-60S5
ECU 3
1. ECU 1
See servo diagram (S)
2. ECU 2
3. ECU 3
4. ECS terminal
See group 20 page 65

S16.Angle sensor KL1036-C
S17.Length sensor
KL1418a
KL1418b
See page 41 Pressure sensor

768-10, 11, 12, 13 Pressure sensor, left
and right lift cylinder, feed line and
return line
9407
Overload indicator
Under normal circumstances, the overload protection system
functions as a balance and gives a continual read-out of the size
and position of the load.
L-TP 4.22M = The distance between the front edge of the wheels
and the centre of gravity of the load.
23.5 T = Actual load in tons.
X = Load indicator, fills the display to the right for 0-100% loads.
When the load indicator reads full, the system interrupts opera-
Y X tion due to forward overload. There remains a safety margin of
approx. 33% (remaining counter-weight). The red warning lamp
lights continuously, the warning buzzer sounds continuously and
the LIFT, LOWER and BOOM OUT functions are interrupted. Of
these, it is possible to make a by-pass connection to the LOWER
function using the switch on the side of the hydraulic console in
Load the cab.
Area with 33% safety Load X, along the whole of the load curve corresponds to maxi-
remaining mum reading (100%) on the load indicator X (on the ECS termi-
nal display).
X Load curve
Steering axle overload
X
Y = Indicator for steering axle load, fills the display to the left for
95-100% of permitted load. When the indicator reads full, i.e.,
Distance with a load of 33 or 43 tons, depending on the type of machine,
centre of drive axle - centre of load
the red warning lamp on the ECS terminal blinks and the buzzer
sounds intermittently.
Regeneration
The regeneration function operates on the LIFT and BOOM OUT
functions and is a system that directs the return flow of hydraulic
fluid from the piston sides of the lift and extension cylinders, di-
rectly back to the cylinder feed. The system is activated at hy-
draulic pressures lower than 8.5 MPa and considerably increases
the piston speed by increasing the flow of hydraulic fluid. This
means that much more rapid movement is possible with the ma-
chine not under load. The greatest load that permits the regener-
ation system to be activated is, for example, an empty container
on the first row. With a greater load, the LIFT and BOOM OUT
functions operate normally.
The regeneration starts with a time delay which is set in the SET-
UP EL-SERVO menus, see Technical Handbook ECS SERVICE
End position damping

End position damping reduces the speed of the LIFT/LOWER
and BOOM OUT/IN functions to reduce jolting at stop positions.
The system supplies less current to the main valves which then
provide a reduced flow of hydraulic fluid/pressure and thereby re-
duce the speed of the above functions.
When calibrating Module 60 define and set the distance from the
stop positions where end position damping is to be activated.
9407
S18
S16 S17
S16. Angle sensor 768-10. Pressure sensor, feedline right lift cylinder
S17. Length sensor 768-11. Pressure sensor, returnline right lift cylinder
S18. Regeneration valve 768-12. Pressure sensor, feedline left lift cylinder
768-13. Pressure sensor, return left lift cylinder
9407
ECU 3 Functions
ECU Signal Size LED Function
Pin
8 Digital IN 1 I/O LE14 Parking brake (Remote control)
9 Digital IN 2 I/O LE17
32 Digital IN 6 I/O LE16 Cab movement, FORWARD
33 Digital IN 7 I/O LE19 Cab movement, BACK
34 Digital IN 8 I/O LE22 Cab movement, front and back end positions
57 Digital IN 11 I/O LE21 Remote control
58 Digital IN 12 I/O LE24 Support jacks, change load curve
2 Digital OUT 1 PNP I/O LE6
50 Digital OUT 7 PNP I/O LE12 24 V feed to switch for support jacks
22 Digital OUT 1 PNP NPN
46 Digital OUT 2 PNP NPN
40 Analogue IN 1 0-10V
42 Analogue IN 2 0-10V Lever TILT P4
43 Analogue IN 1 0-23mA
63 Analogue IN 3 0-23mA
27 Analogue IN 1 0-196ohm
6 Analogue IN 1 70..120°C
7 Analogue IN 2 -20..120°C
30 Analogue IN 3 -20..120°C
53 Analogue IN 4 70..120°C
1 Analogue UT PWM PNP 1 LE5 TILT OUT
3 Analogue UT PWM PNP 2 LE3 TILT IN
4 Analogue UT PWM PNP 3 LE2
5 Analogue UT PWM PNP 4 LE4
47 Analogue UT PWM PNP/NPN 1 LE38 Cab movement, FORWARD
69 Analogue UT PWM PNP/NPN 2 LE36 Cab movement, BACK
35 Pulse sensor 1
59 Pulse sensor 2
60 Counter
36
9407
Technical Handbook Circuit Board Group 20 P. 67
LE1 Should always be lit, indicates 5V feed to ECU3 LE39 Should be extinguished
from the voltage transformer LE40 indicates communication to the terminal and
LE29 Not used should blink.
LE30 Not used If it lights continuously or not at all, the program
will not start, i.e., something is wrong, for exam-
ple, the EPROM or power supply
ECU 3 Circuit Board

9407
Technical Handbook 54 Tilt Group 20 P. 68
Module 54 Tilt
1. 10V feed from S3.45 (ECU3) to connector S55.14
2. Via cable S33 to S42.3
3. Reference voltage 10V from ECU 3 S3.44 to connector
S55.15
4. Via cable S33 to S42.1
5. Signal from D sub-contact S42.2 to S55.4
6. ANA IN 2 S3.42
IN OUT
Tilt - OUT
7. Control lever P4 is moved downwards
8. If ANA IN 2 is 5-10V supplies ANA OUT S3.1. LE5 lit
9. S59.1
10. Via S29.13 to top-lift E56.37
11. To E46.11. The attachment tilts outwards
P4 Tilt - IN
12. Control lever P4 is moved upwards
13. If ANA IN 2 is 0-5V supplies ANA OUT S3.3. LE3 lit
14. S59.2
15. Via S29.14 to top-lift E56.38
16. To E46.12. The attachment tilts inwards
E46
9407
Technical Handbook 56 Cab movement Group 20 P. 69
Module 56 Cab movement

See diagram next page and the el-servo diagram S.
Conditions: The doors must be closed, otherwise it is only possi-
ble to move the cab 100 mm.
1. Connector S56.7 feeds 24 V to the cab movement system.

(See el-servo S).
2. 24 V to relay 1.28 pin 30.
3. S52.6 - S52.10
4. See circuit diagram for cab movement
5. To limit switch 3.
6. Current to S52.9.
7. Feed to relay S28.86.
8. Earth signal S52.1 - S52.5 - S52.12.
9. Conditions: Limit switches 4 and 5 break, i.e., The doors are
closed. Limit switch 3 breaks, i.e., the cab is not moved.
11. The cab movement button (2) forwards, voltage to the but-
ton’s connector, 7.
12. Feed to S53.11.
13. DIG IN M3.32, LE 16 lit.
14. ANA OUT M3.47. LE38 lit.
15. S63.13.
16. 24 V feed to hydraulic valve 6 that opens for hydraulic feed to
the cab movement cylinder. Cab movement forwards or
backwards.
17. The cab moving button (2) backwards, as above.
18. DIG IN M3.33, LE19 lit.
The safety system

1. The limit switch 3 breaks once the cab is moved 100 mm for-
wards.
3. Current to relay S.28.86, relay makes.
4. Hold circuit to S2.33 breaks, LE19 extinguishes.
5. Feed to cab movement breaks and the cab cannot be
moved.
6. If any of the doors are open, the earth signal is fed to relay
S28.85. If, at the same time, voltage is fed to limit switch 3,
relay S28 breaks the hold circuit to S2.33 and the feed to cab
movement is thereby also broken.
Starting and braking

Sensor 7 with an activator on the cab movement track provides
smooth starting and braking of the cab’s movements at the end
positions. Even if one of the doors is opened, the cab stops
smoothly.
(Signals Sensor 2 Relay 28 - M3.47, M3.69 must be defined)
1
4
Technical Handbook
ContChamp DRD-S
5
7 7
8
ECU 3
2 4
5
56 Cab movement
3
7
8
H38
6 6 (H37)
8
1. El-servo (S) 6. (H37) Control valve, feed to hydraulic motor H38

2. Cab movement switch 7. Inductive sensor, speed reduction at start and stop
3. Limit switch, makes when cab is moved 100 mm forwards 8. Activator for 7
4. Limit switch, makes when right door is open. H38. Hydraulic motor cab movement
5. Limit switch, makes when left door is open
9407
Electrical circuit, cab movement

Group 20 P. 70
02-03
9407
Technical Handbook 61 Support jacks Group 20 P. 71
Module 61 Support jacks

Certain machines are equipped with support jacks in order to in-
crease the capacity in the third container row. The support jacks
are controlled with a switch in the operator’s cab. A hydraulic cyl-
inder affects a linkage system which presses the support jack
down and thereby reduces the load center by 600 mm, which in-
creases the third row capacity.
As the support jacks have left their upper position, a red warning
lamp will light up simultaneously as the transmission is disen-
gaged. When the support jacks have reached the bottom position
a green lamp will light up. Furthermore, the overload safety sys-
tem changes load curve. As a result of this, the higher capacity
(+7 tonnes) in container row 3 can be utilized.
The upper and lower support jack positions are controlled by in-
ductive sensors which are connected to the overload safety sys-
tem.
If overload occurs, the support jacks can be lowered. On the con-
trary, the support jacks cannot be raised until the overload is neu-
tralized by disengaging the load or retracting the boom.
6.1-2 6.3-4
1. Hydraulic cylinder
2. Linkage system
3. Support jack
4. Bolt, fastening torque 2350 Nm
3
5. (oiled bolt)
6.1-2 Inductive sensor, support jacks up,
right and left
6.3-4 Inductive sensor, support jacks down,
right and left
Support jacks
4
5
Technical Handbook
ECU 3 ContChamp DRD-S
61 Support jacks
KL801
1. Red warning lamp, support jacks 45. Indication suppot jacks

raised lowered
2. Green lamp, support jacks lowered 6. Inductive sensors, activated 100
3. Switch support jacks RAISE/ mm prior to maximum travel
LOWER 1. Right support jack raised
6 4. Electrical central unit 2. Left support jack raised
5. Relays 3. Right support jack lowered
7 43. Control of support jacks at 4. Left support jack lowered
overload 7. Hydraulic valve, hydraulic cylin-
44. Indication support jacks der supply
raised
9407
Support jacks
Group 20 P. 72
02-03
9407
ContChamp DRD-S Diagrams 02-03
Technical Handbook Gear changing systems Group 20 P. 73
Manual electrical gear-changing system Clark

36000/40000
Components
The components shown in this diagram can also be found inte-

grated in the general electrical diagram in this handbook.
A. Gearbox control valve

B. Selected gear
C. Activated solenoids
D. To seat buzzer switch
F. To starter motor (50)
G. From starter switch
H. From alternator (D+)
J. To parking brake warning light
K. For gearbox
M. Included in engine wiring
1. Gear lever
3. Sensor for outgoing gearbox revolutions
4. Valve housing with solenoid valves
5. Central electrical unit
6. Switch for parking brake - ON when brake is released
7. Inching switch -OFF when inching
8. Relays
3. Wiper motor
4. Starter motor
5. Stop
6. -
7. Reversing lights
8. Inching
9. Reverse gear
10. Forward gear
9. Reversing inhibitor
Cable colours
Svart = Black
Grå = Grey
Röd = Red
Blå = Blue
Gul = Yellow
Grön = Green
Brun = Brown
Vit = White
Rosa = Pink
9407
G H
F
J
8
D
KL 1564
6
3
M
4
1
C
A
B
Clark 36000/40000
Manual electrical gear-changing system
9407
Automatic electrical gear-changing system Clark

36000/40000
Components
The components shown in this diagram can also be found inte-

grated in the general electrical diagram in this handbook.
A. Gearbox control valve

B. Selected gear
C. Activated solenoids
D. To seat buzzer switch
F. To starter motor (50)
G. From starter switch
H. From alternator (D+)
J. To parking brake warning light
K. For gearbox
L. ECU connections
M. Included in engine wiring
1. Gear lever
2. Revolution sensor on the torque converter (engine revs.)
3. Sensor for gearbox outgoing revolutions
4. Valve housing with solenoid valves
6. Switch for parking brake - ON when brake is released
7. Inching switch - OFF when inching
8. Relays
3. Wiper motor
4. Starter motor
5. Stop
6. -
7. Reversing lights
8. Inching
9. Reverse gear
10. Forward gear
9. Reversing inhibitor
Cable colours
Svart = Black
Grå = Grey
Röd = Red
Blå = Blue
Gul = Yellow
Grön = Green
Brun = Brown
Vit = White
Rosa = Pink
9407
J
GH
D
F
8
7
K
E
6
KL1565
5
3
1
4
C
2
4
B
A
Clark 36000/40000
Automatic electrical gear-changing
9407
Technical Handbook Component Lists Group 20 P. 77
El-servo (S)
A38630.0100/0200
Components
2. ECU2
3. ECU3
4. ECS terminal
5. PC connection (beside connectors under seat)
7. Main valve
1. LIFT
2. LOWER
3. BOOM OUT
4. BOOM IN
5. BOOM IN 2
6. BOOM OUT 2
7. LOWER 2
8. LIFT 2
8. Buzzer connected to the warning lamp on the display
Continuous tone for forward overload
Intermittent tone for steering axle overload warning
9. CAN bus, beside ECU 2 under seat
10. Relays
1. Overload and red warning lamp
2, 3. Warning, overload steered axle
14. Regeneration valves, lift

15. Blocking valves, right and left lift cylinders
With emergency lowering function
31. Cab movement

32. Control lever
33. Cable
34. Switch, Twist-locks
35. Switch, stop at 30-35’
36. Main switch for control panel
37. Switch, by-passing of safety locking
42. D sub-contact below the control lever

43. Solenoid valve, disconnection of hydraulic pump at
transportation
(See also Hydraulic diagram, 40)
73. Solenoid valve, activation of pump 3 for feeding of top lift
74. Valve section for TILT in top lift main valve, see also hydraulic
diagram top lift with tilt
9407
Technical Handbook Overview, ECS diagrams Group 20 P. 78
ECS Diagrams
The following pages contain the diagrams for the current circuits
in the ECS. Those diagrams that apply to a specific machine, are
combined in certain ways, depending on the modules with which
the machine is equipped. See the table below.
Module 01 = Automatic gear changing
Module 04 = Lever steering
Module 06 = Mini-steering
Module 07 = Monitoring
Module Variations Electrical

combination diagram
01 4 gears A24925.2000
04 Lever steering A24927.2000

06 Mini-steering A24927.2200
(Modules 04/06 in combi- 4 gears A24925.2200
nation with manual gear
changing)
01+07 Monitoring A24929.2000

4 gears A24925.2000
01+04+07 Monitoring A24929.2000
4 gears A24925.2000
50 Mechanical overload A38630.0100
protection system A38630.0200
60 Electronic overload A38630.0100
protection system A38630.0200
9407
Technical Handbook Diagram explanations Group 20 P. 79
Electrical diagram explanations

A H CL
A. Connector, located outside the central electrical unit circuit
board. The second figure denotes the pin number.
B. Cable marking. M1 shows that the cable goes between ECU
1 and the Central electrical unit.
C. Component marking, for more detailed explanation, see the
components list in the Technical Handbook, Group 20.
D. + feed after the ignition key.
E. Function, see tables under headings ECU 1 Functions and
ECU 4 Functions respectively.
F. Pin on the 70 pole coupling on the ECU.
G. Type of signal. see tables under headings ECU 1 Functions
and ECU 4 Functions respectively.
H. Cable marking, A shows that the cable is located inside the
central electrical unit.
H R N OM J J. Reference, the cable continues on diagram A08333.1000.
KL1085 K. Ignition key dependent feed, battery + 24V
L. Chassis connection
M. The cable continues on the same diagram, but on another
page P3 = page 3
K D C J H L N. Cable marking, the cable is located outside the central elec-
trical unit.
O. Cable colours
BK = Black
BN = Brown
RD = Red
OG = Orange
YE = Yellow
GN = Green
BU = Blue
VT = Violet
GY = Grey
WH = White
PK = Pink
P. Connection marking on the actual component.
Q. Cable M131B continues on diagram A24927, page 1
P1 = page 1
A M KL1084 1) = Only with Lever steering
R. Connector 5 on the circuit board in the central electrical unit
X = Connector
R C P K = Circuit board
5 = Connector number
A B E C F G D
KL1083
KL1081
KL1082
9407
Technical Handbook Diagram explanations Group 20 P. 80
Cable markings
All cables are marked with a number for identifying the terminal
points as follows:
Cable Destination
271 (657)
From To
P = Pressure Block component
T = Temperature 27 657
η = Coolant level
o = Fuel level Connection 1
on block 27
If there is a dot in the destination number it describes a terminal

block.
If the cable has a connector strap, e.g., a common cable for supp-
lying several functions, a capital letter is added to the cable num-
V = ON/OFF ber.
G = Variable sensor
Cable Destination
103A (26.1)
From Connection 1
block 10 on block 26
Connection 3 To block 26
on block 10
Connected to supply the next function
Jumper
9407
Group 30
Engine
Specifications ............................................................................ 2
Engine ....................................................................................... 3
Description ........................................................................... 3
General............................................................................ 3
Cooling system................................................................ 5
Fuel system ..................................................................... 7
Lubrication system ........................................................ 10
Combusting air system.................................................. 12
Service ............................................................................... 14
Coolant quality............................................................... 14
Lubrication oil quality..................................................... 14
Draining the water from the fuel tank ............................ 14
Inspection of air cleaner and changing
the filter element............................................................ 14
Changing the oil and oil filter ........................................ 15
Checking V-belt tension ................................................ 15
Checking and adjusting the valve clearances ............... 16
Changing the fuel filters................................................. 16
Preventive maintenance on turbo-charger .................... 17
Maintenance of exhaust-gas cleaner ............................ 17
9407
Manufacturer, type Volvo, TWD1031VE Volvo TWD1231VE

Coolant volume, litres 65 75
Rating ISO 3046 kW (hp) 235 (320) 275 (374)
at r/min 2100 2100
Torque ISO 3046, Nm 1500 1745
at r/min 1100 1100
Number of cylinders 6 6
Swept volume, litres 9,60 12
Valve clearance, cold engine
inlet, mm 0.40 0.40
exhaust, mm 0.70 0.70
Idling speed, r/min 675±25 600±25
(Adjust so that the engine runs
smoothly)
Injection pump timing 10°±0.5 BTDC 12°±0.5 BTDC
Thermostat
starts to open at °C 82 82
fully open at °C 95 95
Lubricating oil filter Full-flow, disposable paper elements with
by-pass valve
Lubricating oil pressure, kPa
running speed 300-500 350-500
idling speed 60 min 150 min
Lubricating oil grade See group 90
viscosity
Volume incl filters, litres 32 38
9407
ContChamp DRD-S Engine 02-03
General
The engine TWD1031VE or TWD1231VE is a 6-cylinder, inline,
4-stroke diesel engine with overhead valves. The engine is turbo-
charged, i.e. combustion air is supplied under pressure. As a re-
sult, the quantity of fuel injected can be increased, which
increases the engine output. The turbocharger is driven by the
exhaust gases and uses energy that would otherwise be lost .
1 2 3 4 5 6 7
1. Fan hub
2. Twin fuel filters of throw-away 8 9 10 11 12
type 16
13 14 15
3. Lift eyelet
4. Gear driven coolant pump
5. Air cooled exhaust manifold
6. Turbo-charger
7. Lift eyelet
8. Coolant pipe, inlet
9. Pump coupling guard
10. Smoke limiter
11. Injection pump
12. Fuel pipes for tank
connection
13. Relay for inlet manifold
heater
14. Intercooler
15. Cable iron
16. Coolant pipe, outlet
17. Flywheel housing, SAE 1
18. Starter motor
19. Crankcase ventilation
20. Full-flow oil filters of
spin-on type
21. Oil cooler
22. Vibration damper
23. Automatic belt tensioner
17 18 19 20 21 22 23
Volvo TWD1031VE engine

9407
The engine is pressure-lubricated and incorporates an oil pump

which delivers oil to all lubrication points. A full-flow oil filter
effectively cleans the lubricating oil. The fuel system is protected
against impurities by replaceable filters. The engine has
replaceable wet cylinder liners. The engine has separate,
mutually interchangeable cylinder heads for each cylinder.
1 2 3 4 5 6 7
1. Fan hub
8 9 12 10 11
2. Twin fuel filters of throw-away
type
3. Lift eyelet
4. Gear driven coolant pump
5. Air cooled exhaust manifold
6. Turbo-charger 13 14 15 16
7. Lift eyelet
8. Coolant pipe, inlet
9. Pump coupling guard
10. Smoke limiter
11. Injection pump
12. Fuel pipes for tank
connection
13. Relay for inlet manifold
heater
14. Intercooler
15. Cable iron
16. Coolant pipe, outlet
17. Flywheel housing, SAE 1
18. Starter motor
19. Crankcase ventilation
20. Full-flow oil filters of
spin-on type
21. Oil cooler
22. Vibration damper
23. Automatic belt tensioner
17 18 19 20 21 22 23
Volvo TWD1231VE engine

9407
The following description is valid for both TWD1031VE and

TWD1231VE if not otherwise stated.
Cooling system
The engine is liquid-cooled and equipped with a closed cooling
system consisting of the following main components:
z Coolant pump
z Radiator
z Thermostat
z Radiator fan
z Coolant passages
z Engine oil cooler
z Gearbox oil cooler
The coolant flows through a longitudinal passage into the engine

block. The opening into the cooling jacket of each cylinder is indi-
vidually sized to ensure that each cylinder will be supplied with
the same rate of coolant flow.
The coolant flows in the separate return lines converge into a
common pipe in the thermostat housing. The coolant then flows
to the coolant pump and then into the engine and to the oil cooler.
When the engine has reached its normal operating temperature,
the thermostat will open the circuit to the radiator.
The piston-type thermostat is capable of passing a high coolant
flow rate at a minimum of pressure drop, thus contributing to fa-
vourable coolant circulation in the engine.
The coolant pump is gear-driven with high capacity .
1. Cooler
2. Coolant pump
3. Thermostat housing
4. Oil cooler
9407
The cooling system is equipped with a sensor which activates the

”Low coolant level” warning lamp on the instrument panel, see
group 20.
The engine lubricating oil is cooled efficiently and reliably in a
separately mounted tubular oil cooler. The gearbox oil is also
cooled by the engine coolant, but in a separate shell-and-tube
cooler.
1. Oil cooler, engine oil

2. Thermostat housing
3. Oil cooler, gearbox oil
4. Thermostat, closed
5. Thermostat, open
Pump and thermostat

9407
Fuel system
The fuel circulates in two circuits - the high-pressure circuit and
the low-pressure circuit. When the engine is started, the feed
pump draws fuel from the tank and delivers it at relatively low
pressure through fine filters up to the injection pump. This then
delivers fuel at high pressure to the injectors which supply the fuel
in atomised form to the engine combustion chambers.
Excess fuel which is circulated in the low-pressure system is also
cleaned in the fine filters and is returned through a spill valve back
to the tank.
The fuel system includes the following components:

Fuel tank - a separate unit located on the left-hand side of the
truck. The fuel volume in the tank can be read on a gauge on the
instrument panel.
Feed pump - of piston type, supplies fuel at a certain pressure

and flow rate to the injection pump.
Spill valve - which restricts the fuel feed pressure and provides
continuous venting of the fuel system. Excess fuel flows through
the injection pump before returning to the tank, thus cooling the
fuel in the fuel chamber of the pump, which contributes to more
uniform distribution of the fuel to the various cylinders.
1. Fuel filter
2. Spill valve
3. Injector
4. Injection pump
5. Feed pump
6. Fuel tank
7. Suction strainer
Fuel system, principal

9407
Fuel filters - two filters connected in parallel and with a common

cover. The filters are of disposable type, with the filter elements
made of spirally wound paper.
Fuel filter
Injectors - each with a nozzle holder and a nozzle. When the fuel
pressure has risen to the preset value, the needle will lift and at-
omised fuel will be injected into the combustion chamber through
accurately calibrated holes in the nozzle sleeve .
1. Supply pipe coupling

2. Spill fuel pipe connection
3. Spacers for adjusting the opening
pressure
4. Compression spring
5. Thrust pin
6. Nozzle sleeve
7. Needle
Injector
9407
Injection pump - located on the left-hand side of the engine and

driven by gears. The pump is equipped with an RSV governor
which has a steep control characteristic at low engine speeds. As
a result, the engines appear more powerful and have a higher
tractive effort at low speeds .
1. Stop screw for maximum speed, sealed

2. Accelerator lever
3. Adjusting screw for idle speed
4. Adjusting screw for idle speed stabilizing
RSV centrifugal governor

9407
Lubrication system
The engine is pressure-lubricated, and the oil is supplied by a
pump in the oil sump. All lubricating oil flows through a double full-
flow filters.
The lubricating oil is cooled in an externally mounted tubular oil
cooler by the engine coolant.
The lubricating system includes the following main components:
Oil pump - of gear type, which draws oil through a coarse strainer
that arrests larger particles. The pump delivers oil through the lu-
bricating oil filters to the various passages of the lubricating sys-
tem.
Piston cooling - reduces substantially the piston temperature
which, in turn, contributes to a longer life of the piston rings, re-
duces the risk of carbon deposits and lowers the oil consumption.
The pistons are cooled by oil which is sprayed by nozzles into the
underside of each piston and into the cooling passages when the
piston is at the bottom dead centre.
Cooling is controlled by a piston cooling valve which shuts off the
cooling oil supply at low engine speeds. This ensures that the lu-
bricating oil flow will be a maximum when the engine is started
and when it is running at idling speed. The valve also restricts the
pressure of the piston cooling oil at high engine speeds, to make
more oil available for lubrication.
Piston cooling
1. Oil filter
2. By-pass valve
3. By-pass valve for oil cooler
4. Reducing valve
5. Oil cooler
6. Oil pump
7. Piston cooling valve
8. Oil under pressure to the lubrication
system
9. Oil under pressure for piston
cooling
Lubrication system, principal

9407
Reducing valve - located just before the filter. The valve will
open if the lubricating oil pressure is too high and will return
excess oil back to the sump.
Oil filter - of full-flow type, with a filter element of pleated filter pa-
per. To protect the engine against insufficient lubricating oil, a by-
pass valve is fitted in the oil filter bracket. The valve will open if
the lubricating oil pressure should rise above a certain pressure
due to clogging of the filter. When the valve is open, unfiltered oil
will flow to the engine. The filters are of disposable type and
should be scrapped after use.
Crankcase ventilation - prevents pressurising of the crankcase
and collects fuel vapour, steam and other gaseous products of
combustion. Crankcase ventilation is provided by a pipe connect-
ed to the crankcase inspection cover on the right-hand side of the
engine, between the starter motor and the oil filter.
.
1. Filter by-pass valve

2. Oil cooler by-pass valve
3. Oil cooler
4. Full flow filter
5. Oil pump
6. Suction strainer
7. Oil sump
Lubrication system
9407
Combustion air system

Large quantities of air are necessary for burning the fuel supplied
to the engine. Free, unrestricted flow of fresh air and exhaust gas-
es is therefore essential to allow the engine to run efficiently.
Air cleaner
The intake air is cleaned in a two-stage air cleaner, the first stage
of which collects coarse particles by cyclone action, and the par-
ticles are disposed of through a particle ejector. The second
stage consists of a filter element - the main filter element. A pres-
sure indicator shows red signal if the pressure drop in the filter ex-
ceeds approximately 500 mm water column. At this point the filter
insert should be replaced. A safety filter element is located on the
inside of the main element. The safety element prevents the in-
gress of impurities into the engine while the main element is be-
ing changed and if the main element should sustain damage
while the engine is running, e.g. due to incorrect installation.
1. Particle ejector
2. Air filter
3. Pressure drop indicator
Air cleaner
9407
Turbocharger
The turbocharger supplies more air to the combustion chambers
than the engine would be capable of drawing naturally. This ena-
bles the engine to burn more fuel which, in turn, increases the en-
gine output.
The turbocharger consists of a turbine wheel and a centrifugal
compressor impeller, each with a separate casing but mounted
on a common shaft.
The exhaust gases provide the energy necessary for driving the
turbine wheel which, in turn, drives the compressor.
The turbocharger is lubricated and cooled by the lubricating oil
from the engine.
Intercooler
In intercooling, the air that has been compressed and heated by
the turbo is cooled in an intercooler.
The intercooler increases the oxygen supply during combustion
so allowing the injected fuel to be burnt more effectively whilst re-
ducing fuel consumption as well as the level of exhaust emission.
Intercooling also reduces the thermal stressed on the engine, in-
creasing durability and reducing oil consumption.
Inlet manifold heater
Before the air is admitted into the combustion chamber, it flows
across an electrically heated starting element. This has a high
1. Exhaust gases to the engine silencer rating of 3 kW and heats the intake air sufficiently for the engine
2. Exhaust gases from the engine to start at low ambient temperatures. The heater element is ener-
3. Air to the engine intercooler gised when the starting key is turned to the heating position. Suit-
4. Intake air from the air filter able preheating time is about 50 seconds.
1. Air from the turbocompressor

2. To engine cooling system
3. Inlet manifold heater
4. Air to engine combustion
chambers
Intercooler
9407
Coolant quality
Throughout the year, the coolant should consist of a mixture of
60% of water and 40% of ethylene glycol. The coolant should be
changed and the cooling system should be flushed once a year.
Always add a corrosion inhibitor (Kalmar part No. 923.110.0003)
to the coolant, if the above mixture is not used in the cooling sys-
tem.
N.B. Never add a corrosion inhibitor if the cooling system con-
tains glycol, since this would cause foaming which seriously im-
pairs the cooling capacity.
Lubricating oil quality

See Group 90, Periodic supervision.
Draining the water from the fuel tank

Drain any water from the fuel tank by removing the drain plug. Im-
mediately refit the drain plug as soon as the flow of fuel is free
from water and other impurities.
Inspection of the air cleaner and changing the

filter element
Check the indicator when the engine is running. If it shows red,
the main filter element must be changed. The collecting efficiency
of the filter element will not be improved if the element is changed
too early. But if changing of the filter element is delayed, smoke
emission from the engine will increase, the engine may lose pow-
er due to insufficient supply of combustion air, and engine dam-
age may occur in certain cases.
The air pipe from the air cleaner to the engine should be checked
for tightness from time to time. Minor leakage, such as that
caused by loose hose clips, and damaged or porous hoses may
cause dust to be drawn into the engine, which will give rise to
costly engine wear.
Change the filter element as follows:

1. The engine must not be running.
2. Clean the outside of the air cleaner.
3. Remove and clean the dust receiver.
4. Release and carefully remove the main filter element. Do not
1. Main filter insert remove the safety filter element.
2. Safety filter element
5. Fit a new main filter element. Carefully check that it is not
damaged. Note on the safety filter element when the main el-
ement was replaced.
6. Change the safety filter element:
after the main filter element has been changed five times
- at least every other year
- if the indicator shows red after the main element has been
changed
- if the engine has been run with the main element damaged
The safety filter element must not be cleaned and reused. The
engine must not be run without the main filter element. If the main
element must be cleaned and refitted in emergency cases, don’t
use compressed air to clean it, since the filter element may be
damaged. Before refitting it, carefully check that the main filter el-
ement is undamaged.
9407
Changing the oil and oil filter

N.B. Before draining the oil, make sure that it is at normal
working temperature.
1. Remove the drain plug from the underside of the sump and
drain the oil.
2. Clean the area round the filters and place a tray under the fil-
ters to collect any spillage.
3. Remove and discard the filter canisters, which are of dispos-
able type.
4. Pour clean oil into the centre of the new filters, wait until the oil
has seeped through the filter paper and top up until the filters
are full.
5. Lubricate the canister seals with oil.
6. Fit the new filters and tighten them - by hand only.
7. Fill the engine with oil (see Group 90, Lubrication chart).
8. Run the engine and check that no oil leaks at the filters.
9. Stop the engine and check the oil level after a few minutes.
Top up as necessary to the MAX level on the dipstick.
N.B. To avoid serious damage to the engine, use only

genuine Kalmar filters.
Checking the V-belt tension

1. Check at regular intervals that the V-belts are correctly
tensioned. It should not be possible to depress the V-belt more
than 10 - 12 mm mid-way between the pulleys.
2. The engines are equipped with an automatic belt tensioner
which maintains the belt tension constant.
N.B. If the belt drive consists of two belts, always change

both belts.
9407
Checking and adjusting the valve clearances

N.B. Never attempt to check the valve clearances when the
engine is running. The engine must be stationary and cold.
1. Turn the crankshaft in its normal direction of rotation until the

inlet valve of No. 6 cylinder has just opened and the exhaust
valve of the same cylinder has not yet closed fully. Check the
valve clearances on No. 1 cylinder and adjust as necessary.
Valve clearances
Engine TWD1031VE TWD1231VE
Inlet 0,40 mm 0,40 mm

Exhaust 0,70 mm 0,70 mm
2. Check the other valves in accordance with the table below.

Check the valve clear- 1 5 3 6 2 4
ance of cylinder No
...when the inlet and ex- 6 2 4 1 5 3

haust valves of the fol-
lowing cylinders are just
changing over (are
moving simultaneously)
Changing the fuel filters

1. Clean the outsides of the filters.
2. Remove the filters and discard them.

3. Clean the filter head.
4. Check that the new filters are perfectly clean and that the
seals are in good condition.
5. Fit the new filter canisters and tighten them by hand until the
seal is in contact with the seating surface. Then tighten them
a further half a turn.
9407
Preventive maintenance on the turbocharger

The turbocharger may be damaged and, in the worst case, may
break down if the engine is not properly serviced.
WARNING!
1. Check that the engine air inlet system is in good condition, i.e.
Never run the engine with the air inlet that the air cleaner is clean, that none of the hoses are worn
or exhaust pipes disconnected from and that hose connections are not defective, which would al-
the turbocharger, since personnel low oil to seep past the seals on the compressor side and be
could then sustain injuries. entrained by the inlet air. The latter may lead to high exhaust
gas temperatures and overheating of the turbine shaft
bearing. If corrective action is then not taken, the turbo-
charger may break down.
2. Change the lubricating oil and filter at the specified intervals.
Check at regular intervals that the lubricating oil lines to the
turbocharger are in good condition and do not leak. Also
check regularly that the oil pressure is not too low, since this
could quickly lead to damage to the turbocharger.
IMPORTANT! 3. Ensure that the fuel system is serviced at the specified inter-
Adjustments on the injection pump are vals. Inadequate fuel supply caused by clogged fuel filters or
to be performed by authorized person- incorrect setting of the injection pump reduces the turbocharg-
nel only. er speed which, in turn, results in a lower engine output.
4. Check that there are no restrictions in the crankcase ventila-
tion. If the vent is blocked, pressure may build up and may
force oil into the inlet air system of the turbocharger and
engine.
Maintenance of the exhaust gas cleaner

The exhaust-gas cleaner of a well maintained engine needs hard-
ly any maintenance. Yet, an iterative check-up for carbonization
ought to be made, appr. twice a year. If necessary dismount and
clean the exhaust-gas cleaner as follows:
1. Loosen the tube clamps and remove the cleaner.
2. Dry-brush the cleaner on the intake-side.
3. Clean with pressured air from the exhaust-side.
4. Soak the cleaner in soap-water for, at least, one hour.
5. Clean with pressured air from the exhaust-side.
6. Clean with high-pressured water (0.3 MPa max.) from the ex-
haust side.
7. Dry with pressured air.

9407
Group 40
Transmission, drive axle,
brakes
Specification .............................................................................. 2
Transmission ............................................................................. 3
Description ........................................................................... 3
Torque converter ............................................................. 3
Gearbox........................................................................... 3
Oil circuit.......................................................................... 5
Service ................................................................................. 6
Oil level check ................................................................. 6
Changing gearbox oil and filter........................................ 6
Checking pressures in the Clark 36000 gearbox ............ 7
Drive axle................................................................................... 8
Description ........................................................................... 8
WDB-system ................................................................. 11
Parking brake system.................................................... 12
Service ............................................................................... 13
Changing the drive-axle oil............................................ 13
Parking brake – initial adjustment ................................. 14
Compensation of lining wear ......................................... 14
Inspection of dismountable rims................... see group 60

Safety test when changing tyres .................. see group 60
9407
Torque converter and gearbox

Model Clark - 15.5 HR 36432
Number of gears 4F - 4R
Oil capacity, total system, litres 57
Oil grade See group 90
Oil operating temperature, °C 82-93
Max permissible temperature, °C 120
Clutch pressure, bar 17-20
with parking brake applied, All clutch pressures should be equal to
oil temp. 82-93°C, engine idling within 0.4 bar as indicated on pressure
at 625 rpm gauge in cab
Clutch type Multiple disc, hydraulic. Automatic wear
compensation (no adjustment)
All clutches oil cooled and lubricated
Stall speed, r/min 1782±50, TWD1031VE/15.5 HR 36432
1923±50, TWD1231VE/15.5 HR 36432
Oil filtration Full-flow oil filter with safety by-pass, also
strainer screen in sump at bottom of
transmission case
Drive axle
Model Rockwell PRC 7534 W4H
Brake system Wet disc brakes
Parking brake system Spring-activated disc brake on drive axle
input shaft
Wheel dimensions, front/rear, in See data sheet
Tyre pressure, bar 9 bar (0.9 MPa)
Oil change capacities, litres Each hub 12
Differential 50
Oil grade See Group 90
Tightening torque
Drive axle mounting bolts, Nm 2350 (240 kpm)
Rim clamp nuts, Nm 402 Nm (41 kpm)
Universal drive axle joint, Nm
- against gear box 99 (109 kpm), oiled screw
- against driven axle 115 (12 kpm), oiled screw
9407
ContChamp DRD-S Transmission 02-03
The transmission consists of a torque converter integrated with

the gearbox, and a propeller shaft, driven axle with differential,
hub reductions and brakes.
The torque converter and gearbox run together, using a common
hydraulic system. The torque converter can be regarded as a hy-
draulic coupling and is located between the engine output shaft
and the gearbox input shaft.
Torque converter
The most important components of the torque converter are the
pump impeller, turbine wheel and stator. Engine power is trans-
IMPORTANT! mitted mechanically to the pump impeller. The impeller starts an
The machine must not be run at stall oil flow in the torque converter, and is comparable to a centrifugal
speed longer than 30 seconds at a time. pump which draws oil into the centre and discharges it at the pe-
The torque converter will otherwise riphery.
overheat, causing damage to the seals The turbine wheel is located opposite the pump impeller and is
and thus necessitating expensive over-
haul. connected to the torque converter output shaft. The oil enters the
turbine wheel at the periphery and is discharged at the centre.
The stator is located between the pump impeller and the turbine
wheel, at their inside diameter. The function of the stator is to
guide the flow of oil from the inside diameter of the turbine wheel
back to the inside diameter of the pump impeller in the best pos-
sible way.
Torque conversion takes place in the oil circuit of the torque con-
verter. When the load on the truck increases, i.e. when the torque
required increases, the turbine wheel slows down in relation to
the pump impeller, and the oil flowing through the stator then in-
creases the torque.
The output torque gradually increases as the speed of the output
shaft decreases and is a maximum when the output shaft and
thus also the turbine wheel are stationary, i.e. are stalled, see
Technical data.
Gearbox
The gearbox is of constant-mesh type. Gear-changing is carried
out by clutch plates for the various gears being hydraulically ac-
tuated.
The valve body mounted on the side of the gearbox includes
spool valves which guide the oil flow to the various clutches. The
spools are activated in turn by solenoid valves. These are activat-
ed electrically by the gear selector in the cab. As an optional extra
an automatic gear changing system is available. See Group 20.
The gearbox has four ratios in each direction and is also provided
with disengagement, which is actuated by the brake pedal and
comes into operation at a certain brake pressure.
9407
FORWARD
1ST =
2ND =
3RD =
4TH =
1. Pump impeller
2. Turbine wheel
3. Stator
4. Charging pump
5. Suction tube
6. From engine
7. Clutch plates
Gearbox Clark 36000

9407
Oil circuit
The function of the oil is:
– to transmit the engine output to the gearbox. The torque
converter can multiply the engine torque by up to three
times, but at the expense of the speed rotation.
– to apply the clutches in the gearbox.
– to dissipate the heat from the torque converter.
– to lubricate the gearbox and the torque converter.
– transport any solid particles to the filter.
When the engine is running, the oil pump draws oil through a suc-
tion strainer from the gearbox sump and then delivers it through
a fine filter to a pressure regulating valve.
The regulating valve delivers oil at the right pressure to the gear-
box valve body, which actuates the clutch plates for Forward/Re-
verse and 1st/2nd/3rd/4th. The clutches use only a small
proportion of oil delivered by the pump. The remainder is fed
through the torque converter circuit to the oil cooler, and returns
to the gearbox for lubrication.
1. Converter
2. Oil cooler
3. Converter safety valve
4. Lube manifold
5. Automatic clutch release valve
6. Suction from transmission sump
7. Filter
8. Clutch pressure regulating valve
9. For
10. Direction selector valve
11. Rev
12. Speed selector valve
13. Pump
Valve housing of the Clark 36000 gearbox

9407
Oil level check (transmission, incl. converter)

Check the oil level daily with the engine at idling speed and the oil
temperature between 82 and 93°C.
Maintain the oil level at the FULL mark.
Changing the gearbox oil and filter

This should be carried out when the oil is at normal working tem-
perature (82–93°C).
1. Remove the gearbox drain plug and drain the oil.
2. Release the suction strainer, withdraw it and clean the strainer
gauze. N.B. If metal particles are found in the strainer gauze,
investigate the reason before topping up with new oil.
3. Fit a new gasket to the suction strainer and fit the strainer.
4. Unscrew the filter bowl, remove the filter and fit a new filter el-
ement.
5. Fit the new filter and tighten it.
By-pass valve
6. Fit the drain plugs and tighten them.
7. Fill with oil to the MIN mark on the dipstick.
8. Start the engine and run it at 500–600 r/min until the oil has
reached working temperature, and the hoses, cooler and
torque converter have been filled with oil.
9. Keep the engine running at idling speed, check the oil level
and top up to the MAX mark on the dipstick.
IMPORTANT!
In the event of gearbox damage, always replace the oil
cooler – the damage may have been caused by the oil
cooler being faulty.
1. Suction strainer
2. Drain plug
Oil filter Oil filter

9407
Checking pressures in the Clark 36000 gearbox

The pressure should always be checked when the oil is at the
normal working temperature of 82–93°C and the gearbox is in
neutral.
IMPORTANT! Converter outlet pressure:
When the check is carried out under Above 1.7 bar at an engine speed of 2000 r/min, although the
identical conditions, the pressure pressure must not exceed 4.9 bar when the engine is running at
must not vary by more than 0.4 bar
between the various clutches. top speed.
Clutch pressure:
17 – 20 bar with parking brake set, oil temperature 82–93°C, en-
gine at idle (400-600 r/min) shift through direction and speed
clutches
1. Converter "out"
2. Clutch pressure port
3. 4th clutch pressure port
4. Fwd clutch
5. Rev clutch
6. Low (1st) speed clutch pressure port
7. 3rd speed clutch pressure port
Clark 36000 gearbox

9407
ContChamp DRD-S Drive axle 02-03
The drive axle features two-stage reduction (differential and hub).
Rockwell planetary axles permit the bevel or hypoid gearing of

the carrier and the axle shafts to carry only a nominal torsional
load while at the same time providing the highest practical gear
reduction ratio at the wheels.
The differential assembly employs a heavy duty hypoid drive pin-
ion and ring gear. The differential and gear assembly is mounted
on tapered roller bearings. The straddle mounted pinion has two
tapered roller bearings in front of the pinion teeth which take the
forward and reverse thrust and a third bearing behind the pinion
teeth to carry the radial load.
The hub reduction consists of a planetary gear. Each hub reduc-

tion consists of a sun wheel, three planet wheels which rotate
around the sun wheel, and a ring gear surrounding the planet
wheels.
The hub reduction consists of a planetary gear with sun gear,
three planet spur gears and a floating ring gear.
The spur teeth of the sun gear (which floats) mesh with the teeth
of the planet spur gears. The planet spur gears rotate on planet
pins which are mounted in a spider. The planet spur teeth, in turn,
mesh with the teeth of the floating ring gear.
Power is transmitted by the pinion and gear of the differential to
the axle shafts driving the sun gear of the second reduction,
through the revolving planet gears, and then to the planetary spi-
der which drives the wheel hub.
The axle is equipped with an oil-cooled brake system – the wet
disk brake system.
9407
2
6
1
5
1. Planet holder
2. Insert axle with sun wheel
3. Planet wheel
4. Axle end
5. Ring wheel
6. Ring wheel hub
7. Wheel hub
9407
7
6
2
3
1. Crown wheel
2. Radial roller bearing
3. Pinion
4. Tapered roller bearings for axial thrust
5. Parking brake assembly
6. Brake cylinder
7. Brake disc
Differential assembly
9407
WDB-system
The wet disc brake system is maintenance free, being immune to
wear. Neither are the brakes prone to the fading which normally
occurs under tough operating conditions. Furthermore, adjust-
ment of the brakes is not required.
The brakes consist of a series of stationary and rotary discs ar-
ranged alternately. The stationary discs are anchored (splined) to
the brake housing. The friction discs fit between the stationary
discs and revolve with the wheel hub. Hydraulic pressure sup-
plied by the accumulator when the brake pedal is operated moves
a large hydraulic piston outwards which in turn pushes the discs
together to slow the rotation of the re-volving friction discs. This
slows the motion of each wheel hub and stops the vehicle.
The system is fully enclosed, thereby effectively excluding all dirt
and contamination.
A cooling circuit is provided to dissipate the heat produced when
braking. The cooling circuit uses fluid from the general hydraulic
system, which means that the total volume of hydraulic fluid in the
truck participates in the cooling process.
1. Brake pressure from foot brake

2. Hydraulic piston
3. Disc arrangement
4. Hub to spindle seal
5. To vehicle hydraulic system
6. Cooling fluid from vehicle hydraulic system
7. Cooling fluid cavity
8. Lubricating fluid cavity
Wet-disc brake
9407
Parking brake system

The parking brake, which is of the disc type, is mounted on the
drive axle input shaft. The brake is operated by a heavy-duty
spring in the parking brake cylinder and is released by hydraulic
pressure, counteracting the spring force. The brake cylinder and
the calliper assembly form an integral unit. The hydraulic pres-
sure is applied via the parking brake control lever in the operator’s
cab.
The parking brake can also be used as an emergency brake.
Emergency braking causes heavy wear to the brake pads. There-
fore the brake pads have to be changed after two emergency
brake operations.
1. Cylinder and calliper assembly

2. Piston
3. Spring cap
4. Brake linings
6. Seal, large
7. Back up ring, large
8. Seal, small
9. Backup ring, small
10. Stud
11. Lock nut
12. Washer
13. Locking pin
14. Washer
15. Spring
Parking brake
9407
Changing the drive axle oil
IMPORTANT!
To assure that the wheel ends of planetary axles with a
common wheel end/housing bowl oil level are initially
lubricated, fill each wheel end directly with oil before ve-
hicle is put back into operation. DO NOT FILL THE AXLE
THROUGH THE DRIVE UNIT OR
HOUSING BOWL ONLY.
1. Drive the truck forward until the oil drain plug on one of the
wheel hub reductions is at its lowest point of travel.
2. Remove the oil plug and drain the oil. Refit the plug.
3. Repeat the procedure on the other wheel.
4. Remove the drain plug from the bottom of the differential and
drain the oil. Refit and tighten the drain plug.
5. Fill each reduction with fresh oil. The level indicator shall be
horizontal as shown on figure. Remove the filler plug and top
up with oil. Refit and tighten the filler plug Volume: See Spec-
ifications.
6. Remove the level plug from the differential and fill the differen-
tial with oil. Refit and tighten the level plug. Volume: See spec-
ifications.
7. Check that the oil level is up to the level holes. Top up as
necessary
Drive axle oil
Drive axle mounting bolts

Tightening torques, see Specifications
Rim clamp nuts
Tightening torques, see Specifications
9407
Parking brake - initial adjustment

Note! The spring cap (3) has a clock-wise thread and the stud
(10) has an anti- clockwise thread.
The parking brake can also be used as
an EMERGENCY BRAKE. Never try to screw the spring cap (3) in with springs in compres-
sion as the threads may be damaged.
WARNING! 1. Ensure that the spring cap (3) is fully engaged in the
housing (1).
After emergency braking the brake 2. Loosen the parking brake.
pads has to be checked and replaced if 3. Turn the nut (11) against the washer (12).
necessary..
4. Apply the parking brake.
5. Turn the spring cap (3) until the total clearance between the
disc and the lining (2) is 0.5 mm.
6. Loosen the parking brake.
7. Back up the nut (11) and lock it with the pin (13). The brake is
now ready for operation.
Compensation of lining wear

1. Apply pressure.
2. Turn the nut (11) against the washer (12).
3. Release the pressure.
4. Turn the spring cap (3), until the total clearance between the
disc and the linings (4) is reduced to 0,5 mm.
5. Apply pressure.
6. Back up the nut (11) and lock it with pin (13). The brake is now
operational again.
1. Cylinder and calliper assembly

2. Piston
3. spring cap
4. Brake linings
5. -
6. Seal, large
7. Back up ring large
8. Seal, small
9. Back up ring, small
10. Stud
11. Lock nut
12. Washer
13. Locking pin
14. Washer
15. Spring
9407
Group 60
Steered axle
Specifications ............................................................................ 2
Steered axle .............................................................................. 3
Description ........................................................................... 3
Service ................................................................................. 4
Replacement of steering cylinder .................................... 4
Replacement of knuckle pin bearings ............................. 4
Replacement of steering wheel bearings ........................ 6
Miscellanous.................................................................... 7
Inspection of dismountable rims...................................... 8
Safety test when changing tyres ................................... 10
9407
Tightening torques
Wheel nuts, Nm 400 (41 kpm)

Steered wheel bearing nuts, Nm 500 1)
Nuts for lower knuckle-pin

bearings, Nm 1750
Nuts for upper knuckle-pin
bearings, Nm 1500
Mounting screw, M24 670

Steering cylinder, Nm oiled bolt
1) Steered wheel bearings should be tightened during simulta-

neous rotation of the wheels. This makes the bearing rollers set
correctly.
Note that a jacked-up wheel gives a certain resistance when ro-

tated.
After tightening of steered wheel bearings, the truck should be

run for some 100 meters. After that the bearing nut should be
tightened again to 500 Nm. Then the bearing nut must not be
loosened.
9407
ContChamp DRD-S Steered axle 02-03
The steered axle is supported by a pendulum suspension and is

operated by a double-acting steering cylinder. The mechanism
includes the smallest possible number of moving parts to
minimise the number of service points and to simplify
maintenance.
The mounting in the chassis comprises entirely maintenance-
free rubber elements. On certain machines, the rear suspension
is fitted with a pivoted joint. This is used to indicate a too low load-
ing of the steered axle, i.e. the risk of tipping forwards. When only
the weight of the steered axle remains, a "gap" is created which
is indicated by a sensor. See further description under Group 20,
overload indication system.
The knuckle pins and wheel axles are mounted in taper roller
bearings. The hydraulic circuits of the steering system are de-
scribed in Group 70.
1. Pivoted joint
2. Rubber element
3. Steering cradle
4. Upper bearing
5. Knuckle pin
6. Lower bearing
7. Steering cylinder
8. Wheel axle
9. Link lever
9407
Replacement of steering cylinder

1. Disconnect the hydraulic connections from the steering cylin-
der, and protect the open ends of the cylinder and hoses by
means of caps or plugs.
2. Release and remove the piston rod pivot spindles.
3. Remove the bolts retaining the cylinder on the steering cradle.
4. Remove the cylinder.
5. Fit the new cylinder and coat the mounting bolts with LOC-
TITE.
6. Connect the piston rod ends to the link levers. Secure the pivot
spindles by means of the locking washers.
7. Connect the hydraulic hoses.
Replacement of knuckle pin bearings
Dismantling
1. Jack up the steered wheel end of the truck and block it up in a
safe manner.
2. Remove the retaining ring from the steered wheel and remove
2. Locking washer the wheel.
3. Spindle A trolley with a rest for holding the wheel securely will be
4. Mounting bolt, lock with LOCTITE needed for handling purposes.
5. Steering cradle
3. Secure a sling around the hub neck and lift until the hub is held
in position.
Use a trolley, pallet truck or the like provided with a rest.
4. Remove the protective cover from the upper bearing of the

knuckle pin.
5. Release the tabs of the tab washer. Remove the upper bear-
ing nut and remove the tab washer and plain washer.
6. Remove the protective cover from the lower bearing, remove

the split pin from the bearing nut and remove the nut. The in-
ner race of the bearing is loose and can be removed.
7. Remove the knuckle pin by tapping it upwards. The inner race

of the upper bearing will accompany the pin.
8. Use a trolley to lift out the wheel axle.
9. Remove the wipers from the steering cradle.
10.Remove the outer bearing races from the steering cradle by

means of an internal puller.
Note. If a suitable puller is not available, lugs for a pulling
tool may be welded to the inner race. The race will then
shrink and will be easier to remove.
9407
1. Upper bearing 10. Spacer 19. Inner bearing

2. Steering cradle 11. Lower bearing 20. Hub
3. Bearing nut 12. Split pin 21. Outer bearing
4. Cover 13. Cover 22. Washer
5. Bearing nut 14. Gaiter 23. Bearing nut
6. Tab washer, to be greased 15. Steering cylinder 24. Tab washer, to be greased
7. Plain washer 16. Wheel axle 25. Lock nut
8. Knuckle pin 17. Spacer 26. Cover
9. Wiper 18. Sealing ring 27. Wheel nut
9407
Assembly
1. Pack the outer races of the bearings with grease and press
them into the steering cradle.
Note that these are taper bearings. Fit the inner races so that
the larger inside diameter faces outwards.
A round plate should be made for each bearing size for press-
ing in the races. A heavy hammer can then be used to ham-
mer the plate for driving in the race. Don’t hammer the
bearings directly since they may not enter straight and may
become jammed in the housing.
2. Fit new wipers to the steering cradle, using a suitable ring to

tap them in. Tapping the wipers in with a hammer will damage
them.
3. Lift the wheel axle into position by means of a hand trolley or

hoist.
4. Make sure that the contact surface of the wheel axle is clean
and in proper contact with the knuckle pin.
Insert the knuckle pin, fit the spacer and lower bearing inner
race (packed with grease), and fit the bearing nut.
5. Fit the upper bearing inner race (packed with grease), the
plain washer and the tab washer in position. Grease the tab
washer to ensure that it will not be damaged by the bearing
nut.
6. Tighten the lower bearing nut, see Data, and secure it with a
split pin.
7. Tighten the upper bearing nut, see Data. Release the lifting
device as the nut is tightened to ensure that the lifting device
does not prevent tightening.
8. Coat the covers with sealing compound, pack them with

grease and top up with grease through the grease nipple
when the cover is in position and the sealing compound has
dried.
9. Check the tightening torques every 1000 running hours.
Replacement of steered wheel bearings
Dismantling
1. Jack up the steered wheel end of the truck and block it up in a
safe manner.
2. Remove the retaining ring from the steered wheel and remove
the wheel.
Note. A trolley with a rest for holding the wheel securely will be
needed for handling purposes.
3. Remove the hub cover.
4. Secure a lifting sling to the hub, preferably using one of the

hub bolts. Fit a nut to secure the bolt. Use a hand trolley, pallet
truck or the like for lifting the hub.
9407
5. Remove the tab washer, locknut and bearing nut. The plain
washer is loose.
6. Remove the hub off the wheel axle by means of the hand
truck. The inner race of the outer bearing will accompany the
hub.
7. Withdraw the inner race of the inner bearing from the wheel
axle.
8. Remove the seal, but leave the spacer in position.
Assembly
1. Pack the outer races of the bearings with grease and press
them into the hub.
Note that these are taper bearings. Fit the inner races so that
the larger inside diameter faces outwards.
A round plate should be made for each bearing size for press-
ing in the races. A heavy hammer can then be used to ham-
mer the plate for driving in the race. Don’t hammer the
bearings directly since they may not enter straight and may
become jammed in the housing.
2. Press a new seal into the hub. Use a suitable round plate for
this purpose. Tapping the seal itself with a hammer will dam-
age it.
3. Clean the spacer and pack it with grease.
4. Tap the inner race of the inner bearing onto the wheel axle, us-
ing a suitable tube. Pack the inner race with grease.
5. Lift the hub onto the axle, fit the inner race of the outer bearing
position and pack it with grease.
6. Fit the plain washer and bearing nut with the flat surface facing
inwards. Tighten the bearing nut, see Data.
7. Fit the tab washer and locknut. Grease the tab washer to pre-
vent damage by the nut. Tighten the locknut and lock both the
bearing nut and the locknut with the tabs.
8. Pack the outer bearing with grease, pack the bearing cover
with grease and fit it into position. Top up with grease through
the grease nipple.
Miscellaneous
The steered wheel alignment is not adjustable. If the link levers
have been deformed so that the wheel alignment has been dis-
turbed, the link levers must be replaced.
IMPORTANT!
1. Steering cylinder The orientation of the link levers must be correct, since they
2. Wheel axle will otherwise be damaged by the wheels when the steering
3. Link lever movements are large. The correct orientation of the levers is
shown in the figure.
9407
Inspection of dismountable rims

Due to special operating conditions for dismountable rims, theres
is a risk of excessive wear of the lock ring groove in the rim bead,
the lock ring itself and the 45° face on the beadseat or loose
flange. In extreme circumstances this can lead to breakage of the
rim bead which in turn has potentially dangerous consequences.
To minimize the risk of an accident the inspection should be car-
ried out on all EM-wheels (EM=Earth Moving) and dismountable
rims.
7
2
3
5 4
1. Lock ring
2. Beadseat
3. 45° surface on the beadseat or loose flange
4. Lock ring groove
5. Rim bead
6. O-ring
7. Support ring
Different parts of the dismountable rim

9407
Inspection procedure
1. Dismantle the rim according to the standard procedures, see
also Safety instructions when working with tyres, group 00.
2. Carefully clean the outside of the rim beadrim bead by using
a wire brush.
3. The wear of the lock ring on the rim bead outside diameter can
produce a mark A. The mark is located between the ends of
the lock ring, see picture.
4. Measure the depth of the wear at this point using av straight
A edge and feeler gauge. If the wear exceeds 0,5 mm, the
wheel, the lock ring, and the beadseat or loose flange must be
discarded and replaced with new .
5. If a wear mark is not possible to find, measure the circumfer-
ence of the rim bead using a measuring tape.
6. Calculate the diameter D = Circumference/3.14
7. If the diameter is below the minimum specified, the wheel, the
lock ring and the beadseat or loose flange must be discarded.
Information on the minimum diameter of your rim bead can be
recieved from Kalmar.
D
D
High stress areas, how to identify rim damage

1. High stress areas are marked with B on the illustration
2. Typical faults are: circumferential cracks, fretting, corrosion
pitting, distortion, wear.
3. Inspect above areas at each tyre change
B
B
B
9407
Safety test when changing tyres

The test is intended for detecting cracks in wheels. Cracks can
lead to safety risks if they are not detected and remedied.
Potential cracks that cause air leakage are not detected in the
test described here.
The test is carried out in two steps
1. Magnetic examination, which quickly indicates the crack.
2. The actual crack is then tested with penetrance.
Magnetic examination
1. Dismantle the loose componentes of the wheel
A
2. Clean area A on the the wheel totally for paint residue by us-
ing shot blasting.
3. Carry out magnetic examination by using e.g.:
Equipment: Yoke Tiede
Technique:a. Electricity AC
b. Contrast paint
Test medium:a. Wet
b. colour (E-G- Tiede ferrolux)
4. If no cracks are indicated in the magnetic examination, the test
is completed and the wheel approved. In case cracks are indi-
cated, carry out the penetrance test.
Penetrance test
1. Clean area B with cleaning fluid, part.no. 923626.0668.
2. Spray penetrance on the cleaned area and let the sprayed
area dry for approximately 10 minutes
Penetrance: Part no. 923626.0669
B 3. Clean off the penetrance by using cleaning fluid (Part.no.
923626.0668). All excessive penetrance should be removed.
4. Wipe off the cleaning fluid with a cloth, the remaining pene-
trance must evaporate.
5. Spray developer on the area B.
Developer: Part.no 923626.0670
6. Let the sprayed area dry for 1-2 hours.
7. Inspect the lock ring groove visually.
8. If the marked area B shows no linear or dot shaped cracks the
wheel is approved.
9. If the marked area B shows linear or dot shaped cracks, the
wheel must be rejected.
C = Linear split or crack

D = Dot shaped crack
C D
C = Linear split or crack

D = Dot shaped crack
9407
Group 70
Hydraulic system
Specifications .............................................................................2
Main hydraulics ..........................................................................3
Description ............................................................................3
Overview ..........................................................................3
Electro-hydraulic servo system, principles .......................3
Working hydraulics, feed..................................................4
Servo circuits..................................................................10
Lift ..................................................................................11
Boom extension .............................................................13
Service ................................................................................15
Hydraulic fluid.................................................................15
Hydraulic oil filter............................................................15
Breather filter..................................................................15
Hydraulic fluid filter for the servo hydraulics...................16
Hydraulic fluid filter for the brake cooling circuit.............16
Steering system........................................................................17
Description ..........................................................................17
Steering valve ................................................................18
Priority valve...................................................................20
Brake system............................................................................22
Description ..........................................................................22
Brake system ................................................................22
Cooling circuit.................................................................23
Main components of the brake system ..........................23
Brake system, feed ........................................................24
Hydraulic accumulators..................................................26
Accumulator charging valve ...........................................27
Hydraulic brake pedal ....................................................28
Parking brake .................................................................29
Parking brake valve........................................................29
Service ................................................................................30
Accumulators, checking the pre-charging pressure .......30
Hydraulic oil cooler.........................................................31
Adjusting the WDB brake system...................................33
Cab movement .........................................................................34
Tilt, attachment.........................................................................34
Hydraulic pumps.......................................................................35
Description ..........................................................................35
Variable axial piston pump .............................................35
Vane pump.....................................................................36
Service ................................................................................37
Setting the variable pumps.............................................37
Main valve ................................................................................39
Description ..........................................................................39
Service ................................................................................40
Hydraulic cylinders ...................................................................41
Service ................................................................................41
Repairs to leaking hydraulic cylinders............................41
Lifting cylinder ................................................................42
Telescoping cylinder, main boom...................................43
Damping cylinders, attachment......................................44
Diagrams
Hydraulic diagram, component list ......................................45
Hydraulic diagram, standard (H) ....................... A23056.0400
Hydraulic diagram, separate brake system tank (H)
..................................................................... A23056.0500
9407
See the hydraulic plate

where all present settings are specified.
4 5 6 7 8 9
1 2
1. Warning! High pressure accumulators.

Always empty the accumulators before working on the
system. Use the accumulator evacuating valve. Carefully
study the Instruction Manual and the Technical Handbook.
2. Charging pressure, accumulators.
Setting on the accumulator charging valve.
3. Hydraulic servo pressure. Not adjustable.
4. Hydraulic pressure to bottom lift. (optional)
5. Hydraulic pressure to toplift.
6. Pre charging pressure, nitrogen, accumulators
7. Hydraulic pressure, working hydraulics, main valve
8. Hydraulic pressure, brake system
9. Hydraulic pressure, steering system
9407
ContChamp DRD-S Main hydraulics 02-03
Overview
The numbers in the text preceded by an H, for example, H13, re-
fer to the hydraulic system diagram. The numbering in the differ-
ent illustrations is common with the hydraulic system diagram.
The hydraulic system consists of the following sub-systems:
z Working hydraulics that include:
– Servo hydraulics that supply pressure to the electro-hy-
draulic servo system
– Extension and retraction of the boom
– Lift and lowering of the boom
z Attachment hydraulics (see group 80)
– Rotation of the yoke (hydraulic motor)
– Length adjustment of top-lift (hydraulic motor)
– Side-shift of top-lift
– Locking/release of twist-locks
z Foot brake system
– WDB system, hydraulically controlled, oil-cooled multiple
brake discs with external cooling
z Parking brake system, disk brake on the drive axle's ingoing
axle, spring activated with hydraulic release.
z Steering system
Electro-hydraulic servo system, principles

The working hydraulics are controlled via an electro-hydraulic
servo system, the principle components of which are illustrated
on the next page.
All hydraulic system functions are controlled via three independ-
ent sub-systems:
– El-servo
– hydraulic-servo
– working hydraulics
The el-servo system is controlled by the ECU2 central computer
unit as part of the truck's ECS system. Descriptions of the servo
circuits can be found in group 20, under the ECU2 section.
From ECU2, digital or analogue signals are fed to the control le-
ver. The signals are affected by the degree of movement of the
control lever, after which they are fed back to and processed in
ECU2.
The out-signals for LIFT/LOWER and BOOM OUT/IN from ECU2
are fed to converters (H14 and H15) on the main valve H16. The
converters are electrically controlled pressure reduction valves
that convert the electrical signal to a proportional hydraulic pres-
sure - servo pressure.
The servo pressure affects the control slide in the main valve for
the function in question and from there, the main flow.
Main valve 13 has no converter but obtains its servo pressure
from the converter for the main valve 16.
The pressure regulator valve for the servo circuit obtains its hy-
draulic pressure from pump 2 and provides 30-35 bar servo pres-
sure to the converters on the main valves of the truck and
attachments and for release of the parking brake.
9407
Working hydraulics, feed, standard system

The trucks working hydraulics are fed from five different pumps.
Pumps H2 and H3 are double variable axial piston pumps that
feed the main valves for lift and boom extension as well as the
steering system's priority valve. Both pumps are connected to-
gether and can therefore be regarded as a single pump. The non-
return valve H6 ensures that the pumps cannot interfere with
each other.
The priority valve H10, ensures that there is always pressure to
the steering system and thereafter, that there is servo pressure
via the pressure regulator valve H10a and that the residual flow
goes to lift and boom extension.
Pump H3b feeds the different attachment functions.
Pump 5 is a fixed vane type pump that feeds the brake system's
brake and cooling circuits via an accumulator charging valve H21.
Both main valves are connected in parallel, both for servo and
main flows, which takes maximum advantage of pump capacity
for lift and boom extension.
The pumps draw fluid from the hydraulic tank that is located on
the right hand side of the truck. The pressurized fluid travels from
the pumps to the high pressure filter for cleaning prior to circulat-
ing in the system.
The hydraulic system is controlled, from the cab, with a joystick.
S32
S2 S3
Numbering corresponds with the
hydraulic system diagram (H)
1. Hydraulic tank
14 15 2. Double variable hydraulic pump, LIFT,
S7.3-4 S7.1-2 EXTENSION, STEERING SYSTEM,
SERVO
3. Double variable hydraulic pump, LIFT,
EXTENSION, ATTACHMENTS
13 16 47 5. Fixed hydraulic pump, BRAKE SYSTEM
6. Non-return valve
7. High pressure filter
8. Steering system
12 10. Priority valve, STEERING, residual flow
22 to SERVO, MAIN VALVES
11. Filter, servo circuit
11 13. Main valve
34
8 25 14. Converter, EXTENSION
10
15. Converter, LIFT
7 7 7 16. Main valve
21. Accumulator charge valve
22. Accumulator
21 29 23. Accumulator discharge valve
26
6 6 6 6 25. Valve for servo pressure
27 (Emergency lowering)
26. Filter, cooling circuit, brake system
41 27. Oil cooled brake discs
3 5 23
2 29. Service brake valve
34. Parking brake valve
1 41. Hydraulic oil cooler
KL1336-D 47. Main valve, attachment
(Hydraulic diagram, attachment)
For the following items,
see Electro-servo system (S)
S2 ECU 2
S3 ECU 3
S7.1-2 Converter LIFT
S7.3-4 Converter EXTENSION
S32 Control lever Hydraulic system, standard system, principal
9407
System with separate tank for brake system
Certain machines are equipped with a separate hydraulic tank for

the brake system. The brake system is fed, as with the standard
system, by means of the fixed pump 5 and is cooled by means of
the hydraulic fluid cooler 41.
Working hydraulics are complemented with a separate fixed
pump 44 for circulation in the cooling circuit through the hydraulic
fluid cooler 45.
Otherwise, the system works in the same way as the standard
system.
S32
S2 S3 hydraulic system diagram (H)
1. Hydraulic tank
EXTENSION, STEERING SYSTEM,
14 15 SERVO
S7.3-4 S7.1-2 3. Double variable hydraulic pump, LIFT,
5. Fixed hydraulic pump, BRAKE SYS-
TEM
13 16 47 6. Non-return valve
8. Steering system
10. Priority valve, STEERING, residual
22 34 flow to SERVO, MAIN VALVES
12
25 11. Filter, servo circuit
13. Main valve
11 14. Converter, EXTENSION
8 15. Converter, LIFT
10 41 29 16. Main valve
7 7 7 22. Accumulator
26 27
23. Accumulator discharge valve
25. Valve for servo pressure
45 (Emergency lowering)
6 6 6 6 26. Filter, cooling circuit, brake system
21 23
27. Oil cooled brake discs
29. Service brake valve
2 3 5 41. Hydraulic fluid cooler, brake system
44
43. Hydraulic fluid tank, brake system
1 43 44. Fixed hydraulic pump, cooling circuit
for working hydraulics
KL1562
45. Hydraulic fluid cooler, working
hydraulics
For the following items, 47. Main valve, attachment
see Electro-servo system (S) (Hydraulic diagram, attachment)
S2 ECU 2
S3 ECU 3
S7.1-2 Converter LIFT
S7.3-4 Converter EXTENSION Hydraulic system, system with
S32 Control lever separate tank for brake system, principle
9407
The double variable pumps H2 and H3 are controlled by load sig-

nals (LS). The flow requirement in each function determines the
degree of pump output. The outer pump H3b receives LS-signal
from the priority valve H10. In the H3 LS-line is a solenoid valve
H40 which, when deactivated, drains H3b LS-connection to tank.
(See hydraulic diagram and pictures following pages). This will
happen when any gear is engaged and the parking brake is OFF,
e.g., when the truck is transporting. During lifting, when the gear-
box is in neutral or when the gearbox is disengaged, the solenoid
valve H40 is activated and the pump H3b works normally.
Another solenoid valve, H42, loads pump H3b for feeding the
attachment when any of the attachment functions are affected,
regardless of whether the truck is standing still or in transport
mode.
3a
3b
2a 2b
5
1 KL 1579
The numbers correspond to the hydraulic diagram (H)
1. Hydraulic tank
2. Double, variable hydraulic pump, LIFT, EXTENSION, STEERING SYSTEM, SERVO
3. Double, variable hydraulic pump, LIFT, EXTENSION, TOP LIFT
4. -
5. Fixed hydraulic pump, BRAKE SYSTEM
Pumps, suction side and tank return,

standard system,
9407
System with separate tank for brake system

The fixed hydraulic pump 44 provides the circulation in the
cooling circuit of the working hydraulics.
Tank 43 is completely separate from the other hydraulics and
contains hydraulic fluid for the brake system’s brake and cooling
circuits.
IMPORTANT!
The hydraulic fluid in the separate tank for the brake sys-
tem must never contain any additives.
43 2a
2b 3a
3b
44
5
KL 1563

1. Hydraulic tank
2. Double, variable hydraulic pump, LIFT, EXTENSION, STEERING SYSTEM,
SERVO
3. Double, variable hydraulic pump, LIFT, EXTENSION, TOP LIFT
4. -
43. Hydraulic fluid tank, brake system
44. Fixed hydraulic pump, cooling circuit for working hydraulics
Pumps, suction side and tank return,

system with separate tank for brake system
9407
3a 3b
6
2a 2b
6
10 6
7
A 7
16
13
1

KL1566
Pumps, feed
A. Feed to attachment
1. Hydraulic tank working hydraulics,
2. Double variable hydraulic pump, LIFT, standard
EXTENSION, SERVO
6. Non-return valve
10. Priority valve
13. Main valve
16. Main valve
42
40
40. Solenoid valve, disconnection of pump KL1567

H3b feed to LIFT and EXTENSION
during transportation Working hydraulics
42. Solenoid valve, loading of pump H3b standard,
for feeding attachment
signal circuits
9407
3a 3b
6
2a 2b
6
10 6
7
A 7
16
13
1
Numbering corresponds with the hy- KL1568

draulic system diagram (H)
Pumps, feed
A. Feed to attachment
1. Hydraulic tank working hydraulics,
2. Double variable hydraulic pump, LIFT, separate tank for
EXTENSION, SERVO brake system
6. Non-return valve
10. Priority valve
13. Main valve
16. Main valve
42
40
KL1569
40. Solenoid valve, disconnection of pump
H3b feed to LIFT and EXTENSION
during transportation Working hydraulics,
42. Solenoid valve, loading of pump H3b separate tank for
for feeding attachment brake system,
signal circuits
9407
25
14
10a 15 22
14
14
15
14
11
1 16
13
Numbering corresponds with the hydraulic system diagram (H)
1. Hydraulic tank
10a. Pressure regulator valve SERVO, 30-35 bar
13. Main valve
14. Converter, EXTENSION
15. Converter, LIFT
16. Main valve
22. Accumulator
25. Valve for reserve servo pressure
Servo circuit
9407
Lift
Both lift cylinders are, on the piston side, provided with valve
blocks (H17) which contain blocking valves.
When the lift cylinder is in the bottom position and the lift lever is
768-11,13 not touched, the blocking piston is held in the closed position by
spring pressure as well as by blocking pressure through the
solenoid valve. When lifting, hydraulic fluid is fed to the inlet VA,
the piston opens and releases fluid through port C+ to the lift cyl-
inder. Opening pressure is 2.5 bar.
The valve holds the load by means of fluid pressure from the lift
cylinder to port C+. The pressure is choked as blocking pressure
and presses the piston towards the closed position.
(S14)H17d The blocking valves prevent communication between lift cylin-
ders, which, in turn, prevents any twisting of the boom with
uneven loads.
The lift cylinders are connected in parallel and are fed from both
main valves with the combined capacity from the hydraulic sys-
tems four variable pumps.
KL702-C
768-10,12 (S15)H17b Regeneration

For unloaded lift, i.e., low pressure in the lift circuit, the regener-
S15, S14, ation valve H17e opens. The return flow from the cylinder's rod
see el-servo diagram S side is re-routed and fed direct to the piston side. This provides
considerable additional lift speed as the flow to the cylinder in-
See Group 20
768-10. Pressure sensor, feed, right creases. With a certain increase in pressure in the lift circuit the
768-11. Pressure sensor, return, right regeneration valve closes and the system returns to normal lift.
768-12. Pressure sensor, feed, left A detailed description of lift and regeneration functions can be
768-13. Pressure sensor, return, left found in group 20 El-Servo.
Valve block, lift cylinder
16
18
13 17
18
17
1
1. Hydraulic tank
13. Main valve
16. Main valve
17. Valve block, lift cylinders
18. Lift cylinders
Lift system
9407
D Draining to tank
C+ Feed to lift cylinder
C- Return from lift cylinder
e T Tank return
f VA Feed from pumps
H17.Valve block, lift cylinders

d a. Blocking valve
b. Solenoid valve, control of blocking valve
c. Choke valve, 280 bar
c d. Solenoid valve, control of regeneration
e. Regeneration valve
f. Non-return valve
b
a
H17
e
T VA
C+
f a c
C–
d
Valve block lift cylinder

9407
Boom extension and retraction

The extension cylinder is fed with hydraulic pressure from a sec-
tion of each of the main valves. In this way advantage can be
taken of the flow from all four hydraulic pumps.
In each of the feed lines there is a lowering (retraction) brake
valve with pressure compensated choking, which prevents the
H19b(S18) boom from being retracted too quickly due to the load. This also
functions as hose protection.
H19
Regeneration
For unloaded lift, i.e., low pressure in the lift circuit, the regener-
ation valve H19c opens. The return flow from the cylinder's rod
side is re-routed and fed direct to the piston side. This provides
KL703
considerable additional boom extension speed as the flow to the
cylinder increases.
See also detailed circuit description in group 2 0.
Valve block, extension cylinder
16
19
13
20
13. Main valve

16. Main valve
19. Valve block, extension cylinder
20. Extension cylinder
Boom extension system

9407
c
e d
a a
H19
VA a VA VA
C+
e
b
d
VB
The numbers correspond to

the hydraulic diagram (H)
H19.Valve block, extension cylinder

a. Lowering brake valve with pressure
compensated choking
b. Solenoid valve, control of C–
regeneration valve
c. Regeneration valve
d. Restriction
e. Non-return valve
VA Feed from pumps
D Draining to tank
VB Tank return
C+ Feed to extension cylinder
C- Return from extension cylinder
Valve block, extension cylinder
9407
Hydraulic fluid
The hydraulic-fluid tank is located on the right-hand side of the
truck.
Check the fluid level on the fluid sight-glass, with all hydraulic pis-
tons in the bottom positions.
Top up the hydraulic fluid as necessary. See the Specification for
the oil grades.
If the truck has an oil-cooled wet disc brake system, any hydraulic
oil used for topping-up should contain 6% of Lubrizol additive
which is necessary for good performance of the brake system.
The additive is not consumed during normal operation and must
only be added at oil change and refill. Lubrizol may be ordered
from Kalmar Service department.
IMPORTANT!
Systems with separate tank for the brake system:
The hydraulic fluid for the brake system must never
contain any additives.
WARNING!
Hydraulic fluid is chemically

aggressive. Avoid extended contact with the skin.
1 2 3 4 5 6 7 Hydraulic oil filter

The high pressure filter for the hydraulic oil must be changed at
the intervals specified in the lubrication chart. In addition, the filter
must always be changed whenever work has been carried out on
the hydraulic system.
The filter contains a by-pass valve which opens at a counter pres-
sure of 7 bar in case the filter should be clogged by impurities.
1. Clean the outside of the filter and the area around it.
2. Place a vessel under the filter to collect any spillage.
3. Empty the filter bowl by unscrewing the drain plug.
4. Unscrew the filter bowl.
5. Slide off the filter cartridge.
6. Replace the two O-rings between the filter head and the filter
bowl.
The O-rings are included with the filter cartridge.
Moisten the O-rings with hydraulic fluid prior to fitting.
7. Remove the filter cartridge from its packaging and immedia-
tely fit it.
1. Filter head 8. Clean the filter bowl carefully and half fill it with hydraulic fluid.
2. By-pass valve, 7 bar opening pressure
3. O-ring 9. Screw back the filter bowl in position.
4. O-ring 10.Start the engine to purge the system of air, and check that the
5. Filter cartridge filter does not leak.
6. Filter bowl
7. Drain plug
Breather filters
IMPORTANT! Two breather filters on top of the hydraulic tank protect the hy-
The filter has an arrow on it indicating draulic liquid from impurities as air needs to enter and leave the
the direction of the flow. The filter must tank. The filters are of spin-on type.
therefore be fitted so that the arrow
points in the direction of the flow.
9407
Hydraulic oil filter for the servo hydraulics

The high-pressure filter filters the circulating servo oil to protect
the components downstream of the filter and prevent malopera-
tion.
A by-pass valve opens at 3.5 bar if the filter should become
clogged.
The filter contain a cartridge which should be changed every
1000 hours of operation.
1. Unscrew the bottom section of the housing and withdraw the

cartridge downwards.
2. Fit a new cartridge, check the O-ring and refit the bottom sec-
tion of the housing.
Hydraulic oil filter for the brake cooling circuit

Change the filter every 1000 hours of operation. (Option:Two fil-
ters. Change both filters every 1000 hours of operation.)
9407
ContChamp DRD-S Steering system 02-03
Steering system
The steering system is fed from hydraulic pump 2.
A priority valve ensures that the steering valve always has suffi-
cient fluid. The residual flow goes to the working hydraulics.
From the ORB2 connection on the priority valve there is always a
certain signal pressure in communication with the steering
valve's pressure connection. As soon as the steering wheel is
moved, this, via the steering cylinder circuit, will give a load signal
LS back to the priority valve (LSO-connection), which shifts posi-
tion and feeds out sufficient pump capacity to the steering valve.
The pressure in the steering system is determined by a relief
valve in the priority valve (10d).
8
9
10
The numbers correspond to the

1. Hydraulic tank
8. Steering valve ORBITROL
10. Priority valve
Steering system
9407
Steering valve
The steering valve is of the closed-centre, non-reaction type with
a load signal connection to the priority valve. The load signal en-
sures load-dependent control of the flow from the priority valve to
the steering valve. The closed-centre feature means that the
valve shuts off the flow between the pump and the tank when the
valve is in the neutral position. This is necessary to enable a sig-
nal pressure to be connected to the steering valve.
The steering valve consists of a gear pump and a distribution
valve. When the steering valve is turned, fluid is supplied from the
steering pump across the gear pump to the distribution valve,
which ensures that the flow will be supplied to the port corre-
sponding to the direction in which the steering valve has been
turned. The gear pump ensures that the flow supplied to the cyl-
inder will be proportional to the angle through which the steering
wheel has been turned. If the flow from the steering pump should
cease, the steering valve will automatically perform as a manual
pump, i.e. some degree of emergency control will still be availa-
ble.
A valve block with built-in double shock and suction valves is con-
nected to the steering valve. The shock valves opening at 280
bar, prevent pressure surges caused by blows against the
steered wheels from being propagated to the steering valve. The
suction valves open to prevent vacuum on the opposite side of
the piston, which could lead to cavitation.
1. Steering valve
2. Valve block
3. Double shock valve with suction valve
4. Check valve
Steering valve OSPB with valve block

9407
1. Dust seal 15. O-ring

2. Housing - spool - sleeve 16. Distributor plate
3. Ball 17. Gear set
4. Threaded bush 18. O-ring
5. O-ring 19. End cover
6. Guide ring 20. Washer
7. Bearing 21. Pin
10. Ring 22. Bolt with drilled head
11. Dowel 23. Locking wire
12. Neutral position springs, 1 set 24. Nameplate
13. Shaft 25. Self-tapping screw
14. Spacer 26. Spacer
Steering valve
9407
Priority valve
The priority valve apportions the flow of fluid from the pump H2
so that a sufficient flow always goes to the steering valve.
The priority valve is built into a valve block that also contains the
pressure regulator valve for the servo system.
Steering valve H8-LS is fed with a dynamic load signal, a flow of
2-3 l/min. continually circulates from the priority valve connection
H10-LSO to the control valve. When the steering wheel is turned
this flow is shut off and pressure builds up. The pressure acti-
vates pump H2 and resets priority valve H10c for feeding of the
steering valve H8 (P).
When the steering wheel is not turned, all the flow from the pump
goes to main valve of the working hydraulics, H13, with the ex-
ception of a minor flow that feeds the servo system via pressure
reduction valve H10a.
The pressure reduction valve H10d is adjustable and determines
the steering pressure.
H40
H10
H42
KL1420-D
H10. Priority valve

Direction H40. Solenoid valve, disconnection of
of travel H3b feed to LIFT and EXTENSION
in transport mode
H42.Solenoid valve, loading of pump H3b
for feeding attachment
Priority valve
9407
g h b
f
H10.Priority valve
a. Pressure regulator valve SERVO, 30-35 bar
b. Valve, feed for working hydraulics
10 c. Priority valve, feed for steering system
d. Overflow valve, setting of steering pressure
e. Non-return valve
b f. Restriction
g. Restriction
h. Non-return valve
i. Shuttle valve
a h e BR ACC Connection, reserve servo pressure from
accumulator
c P1 Feed, working hydraulics
ORB 1 Feed, steering valve, with lever steering
ORB 2 Feed, steering valve, with normal steering
LSO Connection, load signal from steering valve
f i LSP Connection, load signal cab movement valve
P Connection, pump pressure
d T Tank connection
P2 Feed, servo system, 30 bar
60CC Connection, load signal, pumps
80CC Connection, load signal main valves and pumps
Valve block connections

9407
ContChamp DRD-S Brake system 02-03
WDB brake system

This system is known as the wet disc brake system, in which each
hub is equipped with a multiple-disc assembly.The disc assembly
comprises stationary discs arranged alternately with a number of
rotating discs. The disc assembly is compressed by hydraulic
pressure to provide effective braking action. The assembly is sub-
merged in a hydraulic oil bath to dissipate the heat generated by
braking. A separate cooling circuit is provided to cool the hydrau-
lic oil.
The advantages of the wet disc brake system include the fact that
no adjustment is needed, and that no fading or wear occur. More-
over, the enclosed oil bath keeps the system completely free from
water and impurities.
The wet disc brake system comprises three separate hydraulic
circuits, i.e. the foot-brake circuit, the cooling circuit and the park-
ing brake circuit. All circuits are supplied with hydraulic fluid under
pressure from a fixed vane-type pump. The brake circuits are
supplied from four hydraulic accumulators and the cooling circuit
is supplied directly from the pump.
The pump feeds a charging valve which ensures that a minimum
pressure will always be maintained in the accumulators. During
the charging process, the charging valve serves as a priority
valve, so that a certain residual flow will be supplied to the cooling
circuit. If the engine runs at no load, the residual flow may be so
small that the flow in the cooling circuit will temporarily stop.
When the accumulator has been charged to full pressure, the
charging valve transfers the entire pump flow to the cooling cir-
cuit.
N.B. Certain machines have a separate tank for the brake
system.
9407
Cooling circuit
When the accumulators are charged, oil is fed to the cooling oil
cavities in the drive axle. A by-pass valve between the supply and
return lines ensures that the cooling oil pressure will not exceed
1,5 bar, in order to protect the drive axle.
The feed is carefully cleaned through filters. The hydraulic fluid is
cooled by means of a fluid cooler. Machines with a separate tank
for the brake system have one hydraulic fluid cooler for the wor-
king hydraulics and one for the brake system.
Main components of the brake system

Numbering refers to system illustrations and hydraulic
diagram (H).
5. Hydraulic pump, which generates the brake pressure and is

driven by a power take-off on the variable pump.
21. Accumulator charging valve, serving as a priority valve which
gives first priority to the brake system. The remaining flow is
delivered to the cooling circuit.
22. Accumulators which are charged by the accumulator charg-
ing valve, are pre-charged with nitrogen and ensure that pres-
sure will be available in the brake circuit even if the engine
should temporarily stop.
23. Accumulator evacuation valve, opened for emptying of accu-
mulator to the tank before any work is carried out on the hy-
draulic system. Valve 25 must be opened when draining the
system.
24. Safety valve 210 bar
25. Valve for reserve servo pressure. Used in emergency situa-
tions if the engine does not run and servo pressure is needed
for the working hydraulics. When draining the system, both
this valve and the accumulator evacuation valve (23) should
be opened.
29. Brake pedal. Supplies oil at a reduced pressure from the ac-
cumulator to the drive axle disc brake assembly.
30. Disc assemblies in the wheel hubs.
31. Release clutch switch, disengages the transmission at a giv-
en brake pressure.
32. Sensor, brake lights
33. Sensor, low brake pressure (accumulator pressure), acti-
vates lamp 45 on the instrument panel
34. Parking brake valve which supplies fluid at a reduced pres-
sure from the accumulator to the parking brake cylinder when
the parking brake is released. Sensor 31 switches on the
parking brake warning lamp when the parking brake is ap-
plied, and also initiates a signal to a buzzer in the cab to indi-
cate that the operator has left the seat without applying the
parking brake.
36. Parking brake cylinder. Actuated by a heavy spring when the
brake is applied, i.e. when the oil has been discharged
through the parking brake valve. The brake is released by hy-
draulic oil from the parking brake valve.
41. Hydraulic oil cooler with electrically powered fan
43. Separate tank for the brake system
9407
22
21
22
22
5
24
26
23
22
KL1571
1. Hydraulic tank
Alternative 43 for system with separate tank
5. Hydraulic pump, BRAKE SYSTEM
21. Accumulator charging valve
22. Accumulators
23. Accumulator evacuation valve
24. Safety valve
26. Cooling circuit filter
Brake system, feed

9407
26
29

1. Hydraulic tank
Alternative 43 for system with separate tank
26. Filter, cooling circuit
Brake system, brake and cooling circuits

9407
Accumulator
The hydraulic system is connected to membrane type accumula-
tors which are pre-charged with nitrogen (100 bar). The mem-
brane is forced upward causing the pressure of the nitrogen in
increase as the accumulator becomes charged with hydraulic flu-
id. When the hydraulic system requires power from the accumu-
lator, the membrane presses fluid back into the system.
The accumulator is fitted at the top with a connection for testing
22 the pressure of the nitrogen, and for refilling nitrogen with the aid
of special filling equipment. Contact KALMAR spare parts.
Part. No. 923120–0542.
The pressurized fluid from the accumulator is utilized to power
the driving brake and parking brake systems.
A special valve (25) can be used to provide reserve servo pres-
sure to the working hydraulics.
An evacuating valve 23 is fitted between the accumulator and res-
KL591 ervoir. This valve shall be used to relieve the accumulator of pres-
sure before carrying out any work on the hydraulic syste m.
At the same time, the valve for reserve servo pressure (25)
25 24 23 should be opened.
22. Accumulator
24. Safety valve
WARNING!
The hydraulic system includes high-pressure accumula-

tors. Open both accumulator evacuation valves (23) and
Accumulator the reserve servo valve (25) before carrying out any work
on the system.
1. Connection
2. Seal
3. Membrane
4. Safety plate
5. Steel bottle
Accumulator
9407
Accumulator charging valve

The function of the accumulator charging valve is to divert the
pump flow to the accumulator whenever the latter needs charg-
ing. This ensures that the brake system is given priority and is
first to receive oil.
When the accumulators are fully charged, the entire flow from
pump 5 is fed to the brake cooling circuit
During charging, the pump delivers oil through a check valve to
the accumulator. A restriction limits the flow to a maximum of ap-
prox. 17 l/min. At the same time, pilot oil pressure is supplied
across the pilot valve to the main valve, where it is added to the
spring force and keeps the main valve closed.
When the accumulator has been charged, the oil pressure from
the accumulator overcomes the spring force in the pilot valve
which changes over and relieves the pilot pressure to the tank.
The main valve changes over and opens the connection to the
cooling circuit motor.
The difference between the pressures at which charging is start-
ed and stopped is determined by the difference in area between
the pressure and tank connections of the valve, and amounts to
about 18% of the pressure at which charging is stopped, i.e.
about 27 bar at a pressure of 150 bar and about 30 bar at 165 bar.
1. To brake system
2. Accumulator
3. Charging pressure adjusting
screw
4. Pilot valve
5. Main valve
6. Check valve
7. To cooling circuit
8. Tank connection
9. Accumulator connection
10. Pump connection
KL1420 Accumulator charging valve

9407
Hydraulic brake pedal

The hydraulic brake pedal consists of a direct-acting pressure-re-
ducing valve of three-way type designed for continuously variable
mechanical operation. The pressure-reducing valve consists of
the components shown in the figure.
When stop 4 is depressed by the pedal, the main spring acts on
the control piston which moves and closes outlet T to the tank.
The circuit between pressure connection P and brakeline B is
then opened. As the pressure in the brake line increases, a pilot
pressure will act on the control piston through the pilot orifice,
counteracting the main spring load. As a result, the brake pres-
sure will increase in proportion to the force exerted on the pedal.
If the pedal force is maintained constant, the brake line pressure
will also be constant.
When the pedal is released, the spring returns the control piston
so that it closes the connection between P and B, simultaneously
opening a connection between B and T to relieve the brake pres-
sure to the tank.
1. Housing
2. Control piston
3. Main pressure spring
4. Pedal stop
5. Return spring
6. Pilot pressure orifice
1. Brake line
2. Neutral position adjustment
3. To tank
4. From accumulator
Brake pedal
9407
Parking brake
The parking brake consists of a disc brake with a brake cylinder
on the drive axle input shaft. The brake is applied by a heavy
spring in the brake cylinder.
The parking brake can also be used as an EMERGENCY
BRAKE. During emergency braking, the brake linings are sub-
jected to very heavy wear. The linings should therefore be
changed after any emergency braking operation.
The parking brake is released by hydraulic pressure being sup-
plied to the cylinder to counteract the spring force. All supply is
controlled by a manual valve which is open when the parking
brake is released.
When the parking brake is applied, the flow of oil to the brake cyl-
inder is interrupted and the oil in the cylinder is discharged to the
tank. The brake is then applied by the spring.
If the accumulator pressure should drop below 115 bar, the warn-
ing lamp low BRAKE PRESSURE will light up on the instrument
panel.
Parking brake valve
The parking brake valve is a direct-acting, three-way pressure-re-
ducing valve. The pressure output is continuously variable, al-
though for practical use in the parking brake system, the valve
can be regarded as an ON/OFF valve.
To prevent inadvertent application of the parking brake, the lever
is provided with a latch which must be raised before the lever can
be moved.
34
21
29
30

hydraulic diagram (H)
1. Hydraulic tank
29. Foot brake valve
30. Foot brake cylinder
32. Parking brake cylinder
Parking brake system
9407
Accumulators, checking the pre-charging

pressure (At least once every year)
Always check that the engine shut-off controls function correctly.
1. Empty the accumulators into the tank by opening the accumu-

WARNING! lator evacuating valve (23) – see illustration.
2. Remove three of the accumulators from the connector and
Danger of personal injury plug the connector holes.
Always empty the accumulators be- 3. Connect a 0–250 bar pressure gauge to the test outlet on the
fore working on the system. Use the accumulator charging valve.
accumulator evacuating valve (23) 4. Start the engine and allow the first accumulator to build up
adjacent to the accumulator connec- pressure.
tion point. Open valve 25 also.
5. Switch off the engine and reduce the pressure by pumping the
Immediately shut down the engine if foot brake repeatedly. The hydraulic pressure should then fall
the charging pressure exceeds the slowly. At a pressure that is, at lowest, approximately 5 bar below
levels stated on the information plate the recommended pre-charging pressure (gas pressure), the
for the hydraulic system. pressure should immediately fall to 0. If the accumulator lacks
pre-charging pressure the pressure shown on the pressure
gauge will fall immediately the engine is switched off. In both
cases, this indicates internal leakage and the accumulator
should therefore be replaced.
6. Open the accumulator evacuating valve (23) and empty the
accumulator into the tank.
7. Repeat the check for the other three accumulators
N.B. It is also possible to check the pre-charging pressure
using test equipment (Art. no. 923120-0542). Follow the in-
structions supplied with the test equipment.
22
KL591
25 24 23

hydraulic diagram (H)
22. Accumulator
24. Safety valve
9407
Hydraulic oil cooler

An oil cooler with electrically powered fan is used for dissipation
of heat, produced mainly by frequent braking.
Machines with a common tank for working hydraulics and braking
system have a common hydraulic fluid cooler for both systems.
21
26
KL 1575
41
The numbers correspond to the Hydraulic diagram (H)
21. Accumulator charging valve

26. Filter, braking system cooling circuit
41. Hydraulic oil cooler
9407
Machines with a separate tank for braking system have one hy-
draulic fluid cooler for the braking system and one for the working
hydraulics, see illustration below and hydraulics diagram..
45
OUT
IN
A
44
KL 1573
Numbering in common with the hydraulics diagram
26. Filter, cooling circuit brake system
41. Hydraulic fluid cooler, brake system
44. Hydraulic pump, hydraulic fluid cooler
41 working hydraulics
45. Hydraulic fluid cooler, working hydraulics
21
26
KL 1572
9407
Adjusting the WDB brake system

The engine and hydraulic system should be at normal operating
temperature before adjustments are carried out. Always check
that the engine stopping device is working.
The various pressures for the machine are given on a separate
plate attached to the machine.
1. Check the pre-charging pressure of the accumulators, see

separate section.
Check the accumulator charging pressure, engine stopped.
– Connect a pressure gauge (0–250 bar) to the measure-
21
ment tapping on the accumulator charging valve 21.
– Use the accumulator evacuating valve to discharge the ac-
cumulator.
– Close the valve 23, start the engine, allow the accumulator
to be charged and read the charging pressure. Adjust the
accumulator charging valve as necessary.
– If the adjustment must be repeated, evacuate the accumu-
lators again, let them recharge, read the new charging
pressure, and so on.
2. Bleed the brake circuit.
– A bleed nipple is provided on the inside of each drive axle
hub. Use a piece of hose to discharge the oil into a suitable
container.
– Open the bleed nipple, depress the brake pedal and let the
oil flow out of the nipple until it is completely free from air
bubbles. Shut off the nipple while the brake pedal is still de-
pressed.
– Repeat the bleeding for the other hub.
KL1420
Check the pressure from the brake pedal.
– Connect a pressure gauge to the measurement tapping on
the brake pedal valve (below the operator's cab)
– Depress the pedal fully and read the pressure, which
should be according to the hydraulic system plate. Leave
the pressure gauge in position.
3. Stop the engine and check that there is no leakage at the
pedal.
– Depress the pedal and read the pressure on the pressure
Bleed gauge. The pressure should be the same as in item 4
nipple above and must not drop for 15 seconds.
– Release the pedal, and the pressure should then drop to 0.
If not, the brake valve is leaking and may cause the brake
to remain applied while the truck is being used, and thus
overheat.
4. Use the accumulator evacuating valve 23 to release the pres-
sure from the accumulator.
5. Start the engine and run it until full pressure is achieved
6. Stop the engine and check that the brakes can be applied 6-8
times before the pressure drops to 70 bar. The
warning lamp 45 for low brake pressure should light up at 115
bar pressure.
Drive axle house inside

9407
ContChamp DRD-S Cab movement 02-03
Cab movement
Cab movement is a hydraulic system that uses the flow from hy-
draulic pump 2. The start and stop of the cab's movement are
dampened, which is controlled by the ECS system. For further in-
formation see description in group 20.
The principle hydraulic system component is a variable control
valve (37) that feeds a hydraulic motor (38). The rotation of the
motor is transmitted to the cab via a chain.
Tilt, attachment (optional extra)
Trucks equipped with forward tilt are fitted with an additional sec-
tion to the cab movement control valve. The same feed as for cab
movement is used. For further information see the description in
group 20.
37
13
2
38
10
1 T
Numbering corresponds with the hy-

draulic diagram (H)
1. Hydraulic tank
2. Variable hydraulic pump
10. Valve block (priority valve)
13. Main valve
37. Control valve, cab movement
38. Hydraulic motor
T = Tilt cylinder
9407
ContChamp DRD-S Hydraulic pumps 02-03
Variable axial piston pump

The two double variable pumps H2 and H3 that feed the lift, boom
extension and top lift are variable axial piston pumps with five pis-
tons placed in a cylinder rotor. The stroke length of the pistons is
determined by the position of an angled pressure plate. The pis-
tons are secured in slip-shoes that rotate against the pressure
plate. The stroke volume area and the area within the pistons are
filled with hydraulic fluid during the suction phase. During the
pressure phase, the hydraulic fluid is fed into the pressure lines
via a valve plate. A hole in the head of each of the pistons allows
hydraulic fluid to be forced out and gives a balanced counter
pressure from the pressure plate as well as a film of fluid that lu-
bricates the surfaces and inhibits wear.
14 7 1 6 13 3 2 5 8 16 4 6
11 12 15
18 19
17 17
18 18
19 19
2 2
KL1420a
1. Rear housing 12. Pump piston

2. Control piston 13. Pressure spring
3. Slip-shoe 14. Drive axle
4. Valve plate 15. Suction line connection
5. Pump housing 16. Pressure line connection
6. Sealed axle bearing 17. Regulator DFR
7. Axle packing 18. Max pressure setting
8. Cylinder rotor 19. Stand-by pressure setting
11. Pressure plate Variable axial piston pump
9407
Vane pump
The pumps for ATTACHMENT (H4) and BRAKE SYSTEM (H5)
are of the vane type and driven from take-offs on the variable
pumps (H2 and H3).
These pumps consist of a pump casing and a pump unit, and are
1. Replaceable cartridge assembly, includes cam of simple design. A rotor in the pump unit comprises a number of
ring, rotor, vanes, pins and sideplates vanes fitted in radial slots. The rotor is driven by a shaft and ro-
2. Front and rear sideplates tates in a cam ring. The rotor vanes follow the profile of the cam
3. Ball bearing ring, and each vane performs two cycles – each comprising one
4. Front sideplate, is lamped axially by discharge suction stroke and one delivery stroke – per revolution. The fluid
pressure to reduce internal leakage flows radially through the pump unit.
5. Double shaft seal
6. Drain hole The vanes are forced outwards towards the cam ring by centrifu-
7. Vane, is urged outward at suction ramp by pin gal force and by thrust pins which are subjected to the same pres-
force and centrifugal force sure as the pump delivery pressure. This ensures that the vanes
8. Cam ring will always be in contact with the cam profile. An fluid film pre-
9. Suction ramp where unloaded ramp moves out vents the vanes from coming into metallic contact with the cam
10. Working vane on in or arc seals discharge pres- profile. In the same way, an fluid film prevents metallic contact
sure from the suction port with the side plates.
12. Discharge ramp where unloaded vane
moves in Since the vanes, ports and pressures are balanced diametrically,
13. Pin cavity is at a steady pressure slightly higher the net load on the rotor is pure torque caused by the pumping
than at discharge port action. Sturdy shaft bearings carry the forces caused by the
14. Lub side holes, lubricate the sideplate surfaces pump drive.
15. Pressure pins, force the vanes outward
16. Vanes
Vane pump
9407
Setting the variable pumps

These settings may be carried out only by authorized personnel
Settings must be carried out with the hydraulic system at normal
working temperature.
5 6 7 8
Venting the pumps
1. The pumps must be vented before the engine is started.
2. Connect compressed air at max 0,1 bar pressure to one of the
breather filter connections on the hydraulic tank. Plug the oth-
er breather filter connection.
3. Loosen following hoses somewhat from the pump connec-
tions: A on the underside, B and C, D on the side.
4. Tighten the hose connections again when air free hydraulic
fluid runs out.
5. Empty the accumulators by opening the accumulator evacuat-
ing valve.
6. Start the engine and stop it again to check the stop function.
Setting of Stand-by pressures
7. Start the engine and allow it to idle.
4 C 8. Connect a manometer (0-250 bar) to the measurement outlet 1, 2,
B 3, 4 and check the stand-by pressure on pump after pump. The
2 pressures should be:
3 1 1 = 2,3 MPa, 2 = 2,1 MPa, 3 = 2,3 MPa, 4 = 2,1 MPa.
Adjust if needed on the adjustment screws for stand-by pressure.
A D Note: These settings relate to a standard machine. Certain higher
H3 H2 capacity machines may have higher stand-by pressures. However,
the same differentials in pressure must always be maintained.
Setting of main pressure limitation valves
N.B. If the main valves are to be replaced or if the seals have
been broken, the main valve main pressure limitation valve
must be adjusted as per points 8, 9 and 10 below. If not, skip
KL1420
these points.
9. Unscrew fully counter-clockwise the adjusting screws 1 and 2
for pressure limitation on both inner pumps.
1-2-3-4 10.Screw in fully clock-wise the adjusting screws 5 and 7 on both
main valves.
Adjusting
screw Adjusting 11.Connect the manometer to test outlet 6, se illustration.
pressure screw stand- 12.Let an assistant increase engine revs to approx 1100 rpm and
limiting by pressure extend the boom max. out until the function is overflowing and
keep overflowing during next item.
13.Screw in the adjusting screw 3 for pressure limitation (pump
H3 inner) until the manometer reading is 5 MPa higher than
the pressure stated on the hydraulic plate.
14.Unscrew counter-clockwise the adjusting screw 5 on the left
main valve until the manometer reading is 3 MPa higher than
the pressure stated on the hydraulic plate.
KL1420a 15.Move the manometer to test outlet 8 on the right main valve
and repeat items 13 and 14 for pump H2 inner, adjusting
1. Test outlet and regulator, pump H2, inner
2. Test outlet and regulator, pump H2, outer
screw 1, and right main valve, adjusting screw 7.
3. Test outlet and regulator, pump H3, inner Setting of system pressure
4. Test outlet and regulator, pump H3, outer 16.Connect the manometer to test outlet 1, pump H2 inner, see
5. Test outlet, left main valve illustration.
6. Main pressure limiting valve, left main valve
7. Test outlet, right main valve 17.Overflow the extension function in the same way as in item 12
8. Main pressure limiting valve, right main valve above
18.Set the system pressure for pump H2 (inner) with the adjust-
H2, H3, see hydraulic diagram ing screw 1 for max pressure. See the hydraulic plate for ac-
tual pressure.
19.Move the manometer to test outlet 2 and set pump H2 (outer),
WARNING! adjusting screw 2 for max pressure.
20.Repeat the setting for all four pumps in the same way.
Immediately shut down the engine if All pumps should be set to the same pressure, the sequence is
the charging pressure exceeds the of no significance.
pressure stated on the hydraulic plate.
N.B. The pressure stated on the truck's hydraulic plate for the
main valves must be set on the pumps - not on the main valves.
9407
Setting of steering pressu re

21.Connect the manometer to the test outlet (9) on the priority
valve H10. Turn the steering wheel to max wheel deflection
and rev up the engine to 1200 rpm. Check that the pressure
reading corresponds to the hydraulic plate.
22.Adjust if needed with the adjusting screw (10)
Checking of accumulator charging pressure
23.Allow the engine to idle.
24.Connect the manometer to the test outlet (11) on the accumu-
lator charging valve H21.
25.Close the accumulator evacuating valve.
H21
26.Check that the accumulator charging starts at 15 MPa and
stops at the pressure stated on the hydraulic plate.
11 12 13
27.Adjust if needed with the adjusting screw (12)
9 10 Checking of servo pressure
28.Connect the manometer to the test outlet (13)
29.Check that the pressure reading corresponds to the hydraulic
plate. The pressure is not adjustable.
H10
KL1420
9. Test outlet for steering pressure, on priority

valve H10
10. Adjusting screw, steering pressure
11. Test outlet, accumulator charging,
on accumulator charging valve H21
12. Adjusting screw, accumulator charging pres-
sure (H21)
13. Test outlet servo pressure
H10, H21, see Hydraulic diagram

9407
ContChamp DRD-S Main valve 02-03
Main valve
The main valve is a load-sensing, pressure-compensated direc-
tional control valve of modular type. In the hydraulic system there
are two units, each one comprising:
z Inlet section
5 z Control section
z Combined control and outlet section
The inlet section is provided with a shunt valve and a main pres-
9 sure limiting valve.
4 The main pressure limiting valve is pilot-controlled and opens the
connection to the tank by moving the spool when the preset pres-
3 sure is reached.
The control section is equipped with a check valve (10) in the

supply passage to prevent inadvertent lowering of the load when
several functions are operated simultaneously. The control sec-
8
tions incorporate load sensing valves (4) for transmitting the load
signal to the variable pumps/loading of pumps.
3 The load signal valve employs the load pressure to control a
spool which, in turn, is supplied with oil from the supply passage
for controlling the shunt valve. The design permits the circulation
10 of a small constant flow in the load signal circuit, thereby ensuring
a supply of warm oil for fast and accurate control.
2 The outlet section has a tank connection and connection for the
7 load-sensing signal.
The valve spools are spring-centered and controlled by hydraulic
servo pressure.
1
KL1423
5 6
1. Shunt valve
2. Main pressure limiting valve
3. Control spool
4. Load signal valve
5. Tank connection
6. Supply from pump
7. Inlet section
8. Control section
9. Control/outlet section
10. Check valve
9407
ContChamp DRD-S Main valve 02-03
Main valve
The main valves are of precision type and must be handled with
great care to safeguard their good performance. The following
rules apply to service work:
1. Never use the spool ends or housings for clamping or

gripping when lifting a valve block.
2. Never subject spool ends or housings to blows or shocks.
Rough treatment may deform the spool, which will lead to im-
mediate seizure.
3. Protect the valves from moisture and dirt. Take particular care
to prevent dirt from entering the connection ports. Protect the
ports and other joint faces to prevent scoring and
bruising. Keep unconnected ports plugged with plastic plugs
or the like.
4. When fitting pipes and hose couplings, observe meticulous
cleanliness. Make sure that no swarf, flakes of paint or other
impurities enter the valve. To avoid unnecessary stresses in
the valve, do not overtighten the couplings.
Main valve – adjusting max pressure
N.B. The pump is set to a lower pressure.

See Setting of variable pumps.
1. Adjustment of main pressure

limiting valve
2. Locknut
3. Return
4. Supply
5. Measurement tapping
9407
ContChamp DRD-S Hydraulic cylinders 02-03
Repairs to leaking hydraulic cylinders – replacing

the seal
IMPORTANT!
Never use compressed air for re-
moving the piston from the cylinder. See also separate Supplement
You could sustain serious injuries.
Hydraulic cylinders, Publ. No.920 937-9279
General instruction applicable to all cylinders
1. Remove the relevant hydraulic cylinder. Fit immediately pro-

tective caps or plugs to the hydraulic cylinder and hose con-
nections.
2. Take the cylinder to the workshop, drain any oil remaining in it
and carefully wash the outside of the cylinder.
3. Dismantle and assemble the cylinder in accordance with the
instructions for that particular cylinder type.
4. Removing the seals:
– Whenever repair work is carried out on hydraulic cylinders,
all seals, scraper rings, etc. must be replaced.
– Take extreme care when removing the seal in the cylinder
head, to avoid scratching the bottom of the groove, since oil
leakage will otherwise occur in the future. Use a screwdriv-
1. Screw driver
2. Lip seal er as shown in the figure.
3. Scraper ring – Clean all components very thoroughly.
5. Fitting of lip seals :

– Fit the seal in the cylinder head with the lip facing inwards
towards the piston. Oil the seal and press it in by hand. N.B.
Don’t use any tools, since the seal may otherwise be
scratched. Even a minute scratch may cause the seal to
leak.
6. Fitting the piston seal:

– All piston seals are of the same design and consist of five
components, i.e. a centre sealing ring, two backing rings
and two guide rings.
– Dismantle the piston seal and start by fitting the sealing ring
onto the piston, and then fit the backing rings and the guide
rings. All of this must be done by hand.
1. Sealing ring
2. Backing rings
3. Guide rings
4. Piston head
9407
Lifting cylinder
1. The lifting cylinder is provided with bearings at both ends. The
piston rod lug is threaded into the piston rod and locked with
locknut.
2. The cylinder head and the cylinder tube are provided with
mounting flanges joint together with hexagon-headed
screws.
19
3
4
2 1. Lifting cylinder
6 2. Cylinder pipe
7 3. Bearing
8 4. Retaining ring
5. Piston rod
6. Seal kit
7. Guide
8. Piston seal
9. Guide
10. O-ring
11. Back-up ring
12. Piston rod seal
13. Wiper
14. Spacer
15. Cylinder head
6 5 16. Screw
10 17. Nut
11 18. Bracket
14 19. Grease nipple
16 9
12 9
13
15
19
17
3
4 18
Lifting cylinder
9407
Telescoping cylinder, main boom

1. The extension cylinder's piston rod end is lug shaped with a
flange that is fixed to the piston rod with hexagonal bolt.
2. The cylinder head is fitted with a flange that is attached to the
cylinder tube with hexagonal bolts.
1. Cylinder
2. Cylinder pipe
3. Piston rod pipe
4. Seal kit
5. Guide
6. Piston seal
7. Guide
16 8. O-ring
9. Piston rod seal
17 10. Wiper
11. Back-up ring
12. Cylinder head
13. Bolt
14. Bracket
15. Bolt
16. Bearing
3 17. Retaining ring
4
6
5
15
13
12
11
16
17
10
9
7 4
8
Telescoping cylinder
9407
Damping cylinder, attachment

1. The mounting lug is welded to the piston rod which, in turn, is
threaded into the piston and locked with a locking screw.
2. The cylinder head is threaded into the cylinder tube.
1. Shock absorbing cyl-

17 inder
2. Cylinder pipe
3. Piston rod
4. Piston
11 5. Seal kit
6. Piston seal
7. O-ring
8. O-ring
9. Seal
10. Wiper
6 11. Spacer
12. Screw
5 15 13. Back-up ring
7 16 14. Cylinder head
15. Guide bearing
16. Retaining ring
3 17. Lubricant nipple
4
12
10
9 5
2
14
13
Damping cylinder
9407
Technical Handbook Component list Group 70 P. 45
Hydraulic diagram, components

Diagram (H), A23056.0400/0500
1. Hydraulic tank
2. Double variable hydraulic pump, LIFT, EXTENSION, STEER-
ING SYSTEM, SERVO
3. Double variable hydraulic pump, LIFT, EXTENSION
4. Fixed hydraulic pump, ATTACHMENT
6. Check valve
8. Steering valve ORBITROL
10. Priority valve, STEERING, residual flow to SERVO, MAIN
VALVES
a. Pressure regulator valve SERVO, 30-35 bar
b. Valve, feed working hydraulics
c. Priority valve, feed steering system
d. Overflow valve, setting of steering pressure
12. –
13. Main valve
14. Converter, LIFT/LOWER
15. Converter, BOOM OUT/IN
16. Main valve
17. Valve block, left and right lift cylinders
a. Blocking valve
b. Solenoid valve, control of blocking valve
c. Shock valve, 280 bar
d. Solenoid valve, control of regeneration
e. Regeneration valve
18. Lift cylinder, left and right
19. Valve block at extension cylinder
a. Lowering brake valve with pressure compensated throttling
b. Solenoid valve, control of regeneration valve
c. Regeneration valve
20. Extension cylinder
22. Accumulator
23. Accumulator discharge valve
24. Safety valve 210 bar
26. Filter, cooling circuit, brake system
27. Oil cooled brake discs
28. Non-return valve, 1.5 bar, safety valve for drive axle cooling
circuit
30. Brake cylinder
31. Sensor, disengagement
32. Sensor, brake lights
33. Sensor, low brake pressure (accumulator pressure)
35. Sensor, indicator lamp parking brake ON and seat buzzer
36. Parking brake cylinder
37. Control valve, cab movement
38. Hydraulic motor, cab movement
39. Control valve Lever steering/Mini steering
40. Solenoid valve, disconnection of pump H3b when transport-
ing
41. Hydraulic oil cooler
42. Solenoid valve, activation of pump H3b for feed to the top-lift
43. Separate tank for brake system
44. Fixed hydraulic pump for working hydraulics cooling circuit
45. Hydraulic fluid cooler for working hydraulics cooling circuit
9407
Group 80
Telescope-boom with
rotator, attachment
Specification .............................................................................. 2
Boom with rotator ..................................................................... 3
Description ........................................................................... 3
Telescope boom.............................................................. 3
Rotator............................................................................. 4
Damping/Forward tilt ....................................................... 5
Service ................................................................................. 6
Checking lubrication ........................................................ 6
Checking boom fixtures,
extension boom and fixed boom ..................................... 6
Checking the sliding plates.............................................. 6
Top lift........................................................................................ 8
Description ........................................................................... 8
Top-lift ............................................................................ 8
Twist-locks ................................................................... 10
24 V feed ....................................................................... 11
Service ............................................................................... 12
Indicating lamps ............................................................ 12
Alignment control........................................................... 12
Safety interlocking system............................................. 12
Checking of ALIGNMENT indicating lamps and
electrical interlocking system......................................... 12
Adjustment and lubrication of sliding plates .................. 13
Control of twist-lock lifting pins ...................................... 14
Inductive sensors .......................................................... 14
Chain adjustment .......................................................... 15
Bleeding the damping cylinders .................................... 16
Setting the resistance of the damping cylinders............ 16
Manoeuvre control valve, setting the pressure.............. 17
Diagrams
Hydraulic diagram, component list ..................................... 18
Hydraulic diagram, top lift without tilt ................. A40853.0100
Hydraulic diagram, top lift with tilt ...................... A40853.0200
9407
See current data sheet

9407
ContChamp DRD-S Boom with rotator 02-03
Telescope boom
The telescope-boom of the ContChamp is made of highly resist-
ant steel of a very sturdy design. The number of welds has been
kept to a minimum to ensure the highest possible strength.
The boom comprises the following:
– Fixed boom
– Extension boom
– Extension cylinder.
The extension boom runs inside the fixed boom on greased slid-
ing plates made of Robalon. The extension boom is provided with
a mounting attachment for the rotator.
The fixed boom’s attachments are provided with bearings. Cables
and hydraulic hoses run on a trailer chain on the outside of the
boom.
1 2 49
KL1424b
KL1424a
1. Fixed boom
2. Extension boom
3. Rotator mounting
49. Damping cylinder
Telescope boom
9407
Rotator
The rotator consists of an upper and lower yoke, connected to
each other by a gear wheel and a powerful roller bearing, which
facilitates the rotation of the lower yoke in relation to the upper
yoke.
The rotation function is described in greater detail in group 20,
under El-servo.
It is possible to rotate the attachment through +195°–105° with
the help of hydraulic motors, steered by the control lever. The ro-
tation brake prevents undesired rotation. When the hydraulic mo-
tors for rotation are activated by the control lever, servo pressure
is fed to the brake, which then releases and rotation can begin.
The over-centre valve (50) provides controlled rotation by pre-
venting the load from moving of its own momentum resulting in
faster rotation than that of the hydraulic motors.
54
52
53
KL 1552
52. Rotation motor with planetary gear

53. Rotation brake
54. Over-centre valve
Rotator
9407
Damping/Forward tilt
The suspension of the rotating yoke is equipped with two hydraul-
ic cylinders (49) the function of which is to dampen uncontrolled
swinging. The cylinders are filled with fluid that, when the yoke
moves, must pass a throttle-check valve (51), which determines
the degree of damping. The damping system is a passive system.
As an optional extra, a system is available with forced steering of
damping cylinders, known as Forward Tilt. The cylinders are then
fed from main valve section 47a, see hydraulic diagram, top lift.
Certain special handling operations require the ability to be able
to lock the forward tilt. The system is then equipped with stop val-
ves 59 (6012 on the top lift circuit diagram).
59
50,51
49
49
KL 1557
Numbering corresponds to the

hydraulic diagram for top-lift.
49. Damping cylinder

50. Shock valve
51. Throttle-check valve
59. Solenoid valve, only system with locking of tilt or
damping
Tilt/Damping
9407
Checking lubrication
Check regularly that hoses and connections are undamaged.
Also check that the lubricant actually reaches the point of lubrica-
tion.
Checking boom fixtures, extension boom and
fixed boom
1. Check all parts for damage or wear. Check the sliding surfac-
es and sliding plates especially.
WARNING!
Checking the sliding plates
The sliding plates are positioned at the front of the inner surface
No service work on boom and of the fixed boom and at the rear of the outer surface of the ex-
attachment is allowed when tension boom. The sliding plates are so positioned that they ab-
the engine is running. sorb both vertical and lateral forces. The fixed boom has six
sliding plates at the front end. Each plate is fitted with a grease
nipple which is accessible from the outside. The extension boom
has four sliding plates at its rear end. These plates are also fitted
with a grease nipple, accessible from the inside. All sliding plates
are fitted with shims to ensure a perfect fit between the sliding
surfaces.
1 3 2
KL1424b
1. Fixed boom
2. Extension boom
3. Sliding plates
3 3
3 3
3
KL1424c
3 2 1 3
Position of sliding-plates
9407
Check the following:

min 15
Wearing of sliding plates
1. The thickness of the sliding plates should be at least 15 mm.
The sliding surfaces of the extension boom are protected by a
special coating. If the sliding plates are worn, so that the bolts
damage the sliding surface, the boom has to be dismounted
1 for service.
2. If the sliding plates are thicker than 15 mm and the play be-
1. Slding plate 2 tween sliding plate and sliding surface is bigger than approx 2
2. Lubricator mm, the sliding plates should be fitted with more shims.
3. Shims
3
Please, contact Kalmar service department for further informa-
tion.
KL1424d
Wearing of sliding plates on one side
1. If the sliding plates are worn on one side, the boom will be ex-
posed to torsional stress. Therefore it is important to check the
plates regularly.
2. The maximum difference in thickness allowed is 2 mm. If this
value is exceeded, the plates have to be dismounted and
plained or replaced.
9407
ContChamp DRD-S Top-lift 02-03
Top-lift
For a detailed function description, see group 20, El-servo.
The top-lift is adjustable for 20-40' containers and is constructed
of welded steel profiles that run within each other on sliding
plates made of Robalon. The top lift is controlled electro-hydrau-
lically from the operator's cab and has a main valve with three
sections for EXTENSION/TWIST-LOCKS/SIDE-SHIFT AND RO-
TATION. See separate hydraulic diagram.
Extension is achieved via a hydraulic motor and two chains.
Two hydraulic cylinders provide 800 mm side-shift.
1 2 55 3
KL 1553
769 55
52 5
1. Chain, left
2. Chain tensioner, left
3. Chain, right
4. Chain tensioner, right
5. Sliding plates
48. Hydraulic motor
51. Hydraulic cylinder, SIDE-SHIFT
769. Sensor, end-position damping
KL1554
Top lift
9407
52
52
47
58
KL 1558
55
58
47. Main valve

52. Hydraulic motor
58. Hydrauic lcylinder, TWIST-LOCKS
Top lift, hydraulic installation

9407
Twist locks
A spring loaded contact pin and an inductive sensor at each twist
lock are used to control and check the alignment. An electrical
locking system prevents twisting of the twist locks before they
7202/ have fully entered the container locking holes. When all four con-
7203
tact pins are depressed, the ALIGNMENT lamp lights up on the
boom. Only then is it permissible to lock the twist-locks.
1
Locking and indicating the twist-lock position
On each side of the top-lift there is a locking cylinder that, via a
2
rod, turns the front and rear 90° in the containers locking hole.
Two inductive sensors on each side monitor whether the twist-
locks are locked or released. See illustration below. The activator,
3, activates the sensor at respective end positions. The distance
between activator and sensor at the end position should be 2-3
mm. Sensor 7205 activates the green TWIST-LOCKS LOCKED
lamp which indicates that both sides of the top-lift are locked onto
the container which is thereby ready to be lifted. When lifting, the
ALIGNMENT lamp is extinguished, i.e., the alignment signal
ceases which prevents accidental release of the twist-locks dur-
ing lifting. The electrical locking device also prevents lifting if the
twist-locks are not released or turned 90° in the container’s lock-
ing hole.
KL777
Sensor 7204 activates the red TWIST-LOCKS RELEASED lamp.

2 1 7202/7203 The attachment can then be lifted from the container.
1. Spring-load contact pin, ALIGNMENT
2. Twist-Lock
7202L. Inductive sensor ALIGNMENT,
front, left side
7203L. Inductive sensor ALIGNMENT,
rear, left side
7202R.Inductive sensor ALIGNMENT,
front, right side
7203R.Inductive sensor ALIGNMENT,
rear, right side
7204 3 7205 54
3. Activator for sensor

54. Locking cylinder
7204. Inductive sensor, twist-locks released.
When sensor is activated the red
TWIST-LOCKS RELEASED lamp lights
7205. Inductive sensor, twist-locks locked
When sensor is activated the green
TWIST-LOCKS LOCKED lamp lights
3
2-3 mm
9407
4
3
2 1
1. Main switch
2. Main fuse
3. Coupling, at rear of boom
4. See electrical installation ECS boom, see group 20
24 V feed of top-lift
9407
Indicating lamps
The top lift has a set of three indicating lamps for container han-
dling:
A. Green left: TWIST-LOCKS LOCKED
B. Orange middle: ALIGNMENT
(The lamp will be extinguished at lifted container)
C. Red right: TWIST-LOCKS UNLOCKED
WARNING!
Whenever the indicating lamps do not work properly, the

attachment should be taken out of service for repair. The
use of an attachment with faulty indication lamps could
be hazardous!
A B C
Alignment control
A spring-loaded contact pin and an inductive sensor at each
twist-lock is used for alignment control. The top-lift is fully aligned
onto the container when all pins have been depressed and the
distance between each pin and sensor have decreased to 4–5
mm. Then the indicating lamp ALIGNMENT lights up and the
twist-locks are ready for locking.
Lamp panel
Safety interlocking system

After locking of the twist-locks the lifting starts. A built in play be-
7202/7203 tween twist-locks and container corner boxes allows the attach-
ment to be lifted enough for the inductive sensors to be
deactivated, i.e. the distance between sensor and contact pin in-
creases to more than 8 mm.
This will brake the minus feed to the twist-lock solenoid valve,
thus making it impossible to operate the twist-locks when lifting.
This electrical interlocking can, in emergency situations, be
bridged by an override switch in the operator’s cab. The override
switch will feed ”false” alignment minus signal to the twist-lock so-
lenoid valve thus making it possible to operate the twist-locks. A
red warning lamp lights up in the operator’s cab when the electri-
cal interlocking is bridged.
Checking of ALIGNMENT indicating lamps and

electrical interlocking system
1. Check that the contact pins in the corner boxes are freely
moveable up and down. A pin which binds in the upper posi-
2 1 tion may indicate correct alignment although the top-lift is not
in contact with all four container corners.
1. Spring-loaded contact pin 2. Check that the indicating lamp ALIGNMENT lights up when
2. Twist-lock the top-lift is fitted to the container and that the lamps are ex-
7202L. Inductive sensor, ALIGNMENT tinguished when the container is lifted.
front, left side
7203L. Inductive sensor, ALIGNMENT 3. When lifting an empty container just enough to make the lamp
rear, left side ALIGNMENT go out, check that it is impossible to unlock the
7202R.Inductive sensor, ALIGNMENT twist-locks.
front, right side 4. The sensor 7202/7203 for alignment should be adjusted to
7203R.Inductive sensor, ALIGNMENT give a signal when the contact pin is depressed 3-4 mm.
rear, right side
Twist-locks
9407
Adjustment and lubrication of sliding plates

The sliding plates are made of brass and must be thorougly lubri-
cated in order to minimize wear. The degree of wear is highly de-
pendant on the environment and may vary considerably.
Equally important is the play between fixed and moveable parts,
which is adjusted by means of shims.
Adjustment of play using shims.
1. Operate the length adjustment and check the play which
should be 1-2 mm on both sides of the moveable member,
horizontally as well as vertically.
2. If needed, disassemble the sliding plates in question and put
suitable shims under the sliding plates. Sliding plates are fitted
in the ends of each moveable member and also each end of
the fixed main beam, see figure.
Shims of various thickness can be ordered from Kalmar, see
Spare Parts Catalogue.
N.B. The shims must be fitted equilateral in order to maintain
the attachment aligned and levelled, otherwise there is a risk
of malfunction.
3. Check the remaining thickness of the sliding plates.

Minimum screw mesh: 5 mm. Minimum clearance between
sliding surface and screw tip: 3 mm.
If necessary when thick shims are needed, change to longer
screws, but note the 3 mm clearance between screw tip and slid-
ing surface.
Lubrication
1. Set the length adjustment to maximum.
2. Use a brush on a long handle to reach into the fixed main
beam. Grease the sliding surfaces on sides, roof and bottom
with a graphitebased grease.
Sliding plate location

9407
Control of twist-lock lifting pins

3 N.B. This control should be first carried out after 5000 hours
of service, or after 2 years - which ever occurs first.
Thereafter, the lifting pins should be checked every year.
Removing the lifting pins

1. Unscrew the grease nipple 1.
2
2. Remove the locking pin 2.
3. Unscrew nut 3, at the same time, support the underside of the
4 lifting pin.
1 4. Remove the lifting pin 5 downwards, the washer 4 comes with
it.
KL1555
Lifting pin control

1. Use magnetic powder testing or penetration fluid.
2. Check to ensure that there are no fractures or splits in any part
of the lifting pin.
5
IMPORTANT!
If any split or fracture is discovered then the lifting pin
must be immediately replaced.
KL1556
If the lifting pin has any other visible damage, then it

must be immediately replaced.
1. Grease nipple
2. Locking pin All lifting pins shall be replaced after 20,000 hours of ser-
3. Fixing nut for lifting pin vice, even if they appear undamaged.
4. Washer
5. Lifting pin
3. Place the washer 4 on the lifting pin and refit the lifting pin.
4. Refit the locking pin 2, and the grease nipple 1.
5. Tighten the nut to a torque of 300 Nm.
Inductive sensors
The inductive sensors control the various functions of the con-
tainer attachments.
The sensors are of the type PNP – positive/negative/positive, the
last P indicating that the sensor produces a positive signal when
activated. The sensor is activated when a magnetic object gets
closer than approx 8 mm from the top of the sensor.
The sensor has two light diodes, one Green and one Yellow (or
Red), which can be used for checking of the sensor function.
Yellow – indicates 24 V plus and minus feed to the sensor
Green – minus signal from the sensor.
Sensor adjustment and check

1. The gap between sensor and magnetic activator should be set
to 4–5 mm. At a distance of more than 8 mm, the sensor is de-
activated.
2. When connected to the 24 V system, the green LED-diode
should be alight. When the sensor is activated, the green di-
ode should be alight.
1. Yellow LED, sensor activated
2. Green LED, 24 V supply 3. Check that the sensor is clean and free from grease and that
3. Magnetic activator it is undamaged. (Grease may activate the sensor).
Inductive sensor
9407
Chain, adjustment
15/16 17/18
1. The chain tension is controlled by two sets of plate springs
and adjusting nuts.
2. The chain play should be max 10-15 mm at retracted attach-
ment, when pressing with the thumb.
3. Adjust if needed with adjusting nuts. Lock with locknuts.
4. After 1–2 years or if the adjustment is fully utilized, remove a
link from the chain.
5. If the chain is slipping over the gear wheel, check the lubri-
cation, specially the fixed beam bottom surface, see section
Adjustment and lubrication of sliding plates.
Bleeding the damping cylinders
1. Set the boom in its lowest position.
2. Allow the engine to idle.
3. Carefully loosen the hose connection to one of the damping
cylinders until hydraulic fluid starts to leak out.
First air-free fluid will come from the connection and thereaf-
ter, fluid mixed with air. Re-tighten the connection once air-
free fluid again starts to flow.
4. Repeat this bleeding process for all four connections.
5. Run the boom up to its highest position and then down again.
S1240010E
6. Repeat the complete bleeding process once more.
15/16 Chain left/right

17/18 Adjustment screw left/right
9407
Setting the resistance of the damping cylinders

1. Run the boom up and down again. Check to see how the top-
lift moves. In the lower position it shall, relatively easily, set it-
self in the horizontal after having hung somewhat angled in-
wards.
2. As required, adjust the choking of the throttle valve.
Two different types occur
– With one adjustment screw for systems with damping only.
– With two adjustments screws for systems with tilt locking or
damping.
3. The block with the throttle valve can be found on the front of
the nose of the boom.
Throttle valve, Throttle valve,

adjustment screw adjustment screw
System with damping only System with tilt lock or damping

9407
Manoeuvre control valve, setting the pressure
1. The main pressure limitation valve (5) shall be set at the same
pressure as the overall system pressure, i.e., 250 bar.
1 2 3 4 2. The pressure of the manoeuvre sections shall be set sepa-
rately for each section. Adjust the adjustment screws (6)
The pressure shall be:
ROTATION, section 1: 150 bar
SIDE-SHIFT, section 2: 160 bar
B LENGTH ADJUSTMENT, section 3:120 bar
A TWIST-LOCKS, section 4: 250 bar
(overall system pressure)
3. To check the pressure, connect a T-connector to either the out-

put of the manoeuvre section or to the incoming line of respec-
tive cylinders. Connect a pressure gauge to the T-connector.
4. Run respective functions to their stop positions, read off the
pressure and adjust the adjustment screw (6) as necessary.
5 6
1. A. ROTATION ANT-CLOXKWISE
B. ROTATION CLOCKWISE
2. A. SIDE-SHIFT RIGHT
B. SIDE-SHIFT LEFT
3. A. LENGTH ADJUSTMENT OUTWARDS
B. LENGTH ADJUSTMENT INWARDS
4. A. TWIST-LOCK LOCKING
B. TWIST-LOCK RELEASE
5. Main pressure limitation valve
6. Adjustment screws, individual pressure
setting of manoeuvre sections
9407
Technical Handbook Diagrams Group 80 P. 18
Hydraulic diagram, top-lift

Components
3. Dubbel variabel hydraulic pump
b. Top lift supply
42.Solenoid valve, activation of pump 3b for top lift supply
47. Top lift main valve
a. Control section TILT
b. Control section ROTATION
c. Control section SIDE-SHIFT
d. Control section LENGTH ADJUSTMENT
e. Control section TWIST-LOCKS
f. Converter
g. Pressure reducing valve, individual setting of control sec-
tion supply pressure
h. Main pressure limitation valve
j. Shock valve
k. Reduction valve for servo pressure, 30 bar
m. Pilot valve servo pressure, excess flow to tank
n. Filter, servo circuit
o. By-pass valve, opens when filter is blocked
48.High pressure filter
49.Hydraulic cylinder, DAMPING/TILT
50.Shock valve
51.Throttle-check valve
52. Hydraulic motor, ROTATION
53. Rotation brake
54. Ove- centre valve
56. Hydraulic motor, LENGTH ADJUSTMENT
57.Over-centre valve
58.Hydraulic cylinder, TWIST-LOCKS
9407
Group 90
Periodic supervision
General survey .......................................................................... 3

General survey chart ............................................................ 4
Daily supervision .................................................................. 8
Every 200 hours ................................................................... 9
Every 600 hours ................................................................. 10
Every 1000 hours ............................................................... 11
Oil and lubricant recommendations .................................... 12
9407
ContChamp DRD-S Empty page 02-03
9407
ContChamp DRD-S Periodic supervision 02-03
General survey
To extend the service life of the truck and to prevent the risk of
faults causing injury to personnel or damage to equipment, the
truck must be subjected to regular periodic supervision.
If the truck is used under conditions in which road traffic regula-

tions are applicable, the special maintenance instructions issued
by the authorities must be followed.
Special procedures are required on trucks used under difficult

conditions, such as in difficult terrain or for the transport of hot
goods. These procedures are not dealt with here.
The intervals at which service measures are carried out can be

determined on the basis of the operating hour meter readings.
When carrying out a 1000-hour service, it is advisable to work in
the following order:
1. Every 1000 hours

2. Every 600 hours
3. Every 200 hours
The same procedure also applies to work carried out in a

600-hour service.
General survey chart
Maintenance intervals, hours
Operating 1000 600 200 Anm

time
200 z Guarantee service after

400 z 50 hours.
z Work in accordance with
600 z
z
800 list below:
z
1000 z z
z
1200 z
z z
1400
... z z
2000 z
...
WARRANTY SERVICE at 50 working hours

1. 200 hours service according to Technical Handbook, group 90
2. Perform and fill in control chart in the Warranty certificate
3. Changing of oil in engine, gearbox, drive axle, rotator reduction gear and
reduction gear on the top lift.
4. Changing filter in engine, gearbox and hydraulic system,
(all filters incl. WDB, servo filter etc)
5. Valve clearance adjustment (engine)
6. Check all bolt joints (see also SI94-003)
9407
3 4 5
2
1 24
DRD420-60S5
6, 7
KL586C
25
Refill
Brake
Planetary
gear
Sight
glass
9407
LUBRICATION CHART
Item Description Interval No. of Remarks
No. operating hours lub.
200 600 1000 points
1 Boom mounting L 2
2 Slide plates, boom L Manually pump grease while the boom is
moved slowly outwards and inwards to its
end positions
3 Rotator mounting L 2
4 Tilt cylinders L 4
5 Rotator reduction gear x C xx 4 Check the level. Top up the red point on the
(Brake and planetary gear) sight glasses 2)
x) First oil change at warranty service
xx) Thereafter oil change every 1000 h
6 Rotator bearing L 4 2 nipples on each side
7 Pinion and ring gear L 3 Brush on with grease

8 Link levers L 4
9 Steered wheel bearing 2 Remove, clean, inspect and pack with
grease every 4000 h
10 Knuckle pin bearings 4 Remove, clean, inspect and pack with
grease every 4000 h
11 Engine oil x x) Change the oil every 200 h 1)
12 Engine oil filter x 2 x) Change the filter every 400 h
13 Gearbox oil C x 1 x) Change the oil. Check the level at idling
speed
14 Gearbox oil filter x 2 x) Change the filters
15 Hydraulic oil filter, working hydraulics x 2 x) Change the filters
16 Hydraulic oil filter, brake system cooling x 1 x) Change the filter
circuit
17 Hydraulic oil, servo system x 1 x) Change the filters
18 Hydraulic oil filter, top lift x 1 x) Change the filters
19 Propeller shaft L 3
20 Drive axle C x 3 Change the oil
21 Breather filters, hydraulic tank x 2 x) Change filters every 2000 h
22 Hydraulic oil C x x) Change oil every 2000 h
23 Door and panel hinges Lift off the doors and panels
24 Brake pedals CL 2 Check and retighten the pedal axle locking
screws. Lubricate axle nipples
25 Hydralic oil, brake system C x 1 x) Change the oil. N.B. Only machines with
separate tank for brake system
1)The interval is greatly dependent on the fuel and lubricant qual-

ity as well as the operating conditions.
If intervals longer than 200 hours are desired, the condition of the
oil must be checked by the company making the oil,
by means of regular lubricant tests.
2) Note! DIfferent oils in brake and planetary gear.
(Volume brake: 0.6 l. Volume gear: 1.6 l)
For volumes, see Technical Data. For lubricating oil grades, see
Oil and lubricant recommendations
L=Lubricate
C=Check
N.B. After they have been washed with degreasing

If the truck is standing unused outdoors, with the agent, all pistons should be moved backwards
piston rods protruding, all piston rods must be and forwards several times to obtain a new pro-
greased to prevent corrosion. tective oil film.
9407
1 2 1
KL 1553a
a
b 4 4
3
KL 1553
4 4 5
KL 1555a
7 6 6 7
KL1555
9
9407
LUBRICATION CHART, Top lift
Item Interval No. of

No. Description operating hours lub. Remarks
200 600 1000 points
1 Sliding surfaces, length adjustment L Brush onto all sliding surfaces with the in
the fully extended position
2 Sliding surfaces, side-shift L Brush onto all sliding surfaces with the top-
lift fully side-shifted in both directions
3 Planetary gear C x 1 Level check, fill to the red spot on the
a. Venting/Topping up sight glass. Oil volume 2.4 litres.
x First oil change - guarantee service
b. Sight glass
x Then, oil change every 1000 hours
c. Magnetic plugg, oil drainage
4 Cylinders, side-shift L 4
5 Chains L 2
6 Locking cylinders, twist-locks L 4 Check that the sensors are free from
grease and that the sensor faces are
undamaged
7 Lifting pin twist connection L x 4 Dismantle the twist-locks every 2000 h.
8 Lifting pin L x 4 Check for wear. If necessary, change
components accordingly. Clean and
pack with grease. Same procedure
should be used if damage to the twist-
locks is suspected. See group 80.
9 Contact pin L 4 Lubricate with grease
Check that the sensors are free from
grease and that the sensor faces are
undamaged
L = Lubricate
C = Check
9407
DAILY SUPERVISION
DAILY SUPERVISION Or when Check Refill if required

refueling
Brakes Function
Steering Function
Rear steered axle suspension Check that the rear suspension is clean.
(On machines with mechanical Check that the sensor is free from grease
overload protection system)
All instruments. Function
Blinkers, brake lights, horn, Head-
lights, reflectors
Boom pivot suspension and sliding Damage
plates
Attachment and rotator Operation

Engine, gearbox, drive axle Noises?
Hydraulic hoses Oil leakage?
Fuel Amount
The fuel meter z
must never show 0
Engine oil z Level

Air cleaner z Indicator z
Coolant z Level z
Hydraulic oil z Level z
Gearbox oil z Level z
Wipers z Fluid level z
Wheels z Damages z
Tyre pressure
1 MPa
9407
Every 200:e hours
Item Unit Action Remarks
1 Truck Wash Note! Do not use highpressure

on bearings or bearing housings
2 Radiator Clean the fins of the radiator with Note! Do not usehigh-pressure.
water and detergent
3 Engine Check the oil and coolant con-

nections for leakage
4 Air cleaner Check the indicator. Replace if See Group 30.

required.
5 Brakes Check for oil leakage. Test brake See Group 70.
performance.
6 Battery cables, terminals and Clean the terminals and apply

fuses petroleum jelly. If necessary, re-
place cables and terminals.
7 V-belts Check the belt tension

8 Telescope boom and attachment Check for damage. Retighten the See Group 80
bolted joints. Check slidingplates
for wear. Apply special lubricant.
Specially check for cracks in
welds on boom and mountings
9 Steering axle Check for play, damage
10 Steered and driven wheels Tighten the wheel nuts. Inspect See Group 40 resp 60 Specifica-
tyres and rims for possible dam- tions
age.
11 Drive axle and propeller shaft Tighten bolt joints. Check for See Group 40 Specifications
leakage
12 Gear box Check for oil leakage.
13 (Air conditioner) Check the performance See Group 10

14 (Exhaust gas emission control Inspect the catalyst and top up See Group 30
system) as necessary.
15 Lubrication points, oil and filter On trucks with automatic lubrica-

changes in accordance with the tion, check to make sure that all
Lubrication chart. lubrication lines are undamaged
and that all lub points are cor-
rectly lubricated
16 Inductive sensors Check setting. Clean the sensors See Group 80

Check for damage.
17 For optional equipment, please

refer to special instructions is-
sued.
IMPORTANT!
Always attend to any damage, wear or faults that are im-
portant to the performance of the truck
and its service life or the safety of the personnel.
9407
Every 600 hours
Item Unit Action Remark
1 Air cleaner Change the filter element if the See Group 30

indicator shows red.
2 Turbo charger Check for leakage. See Group 30
3 Exhaust system Check for leakage.
4 Steered wheels Check the wheel alignment, and See Group 60

check for deformation or bearing
play.
5 Telescope boom and attachment Check that the hose guide runs
freely and that the hoses are in
good condition.
6 Lubrication points, oil and filter

changes in accordance with the
Lubrication chart.
7 200 hours service
IMPORTANT!
9407
Every 1000 hours
Item Unit Action Remarks
1 Fresh-air filter Change filter element See Group 10
2 Engine Check valve clearances, cooling See Volvo Workshop Manual

system, starter motor, alternator and Group 30
and fuses
3 Fuel tank Drain

4 Fuel filter Change the filter. Bleed the fuel
system.
5 Injectors Check See Volvo Workshop Manual
6 V-belts Check and change as neces-

sary.
7 Batteries Check.
8 Wheels Check for damage
9 Propeller shaft Check the bolted joints and See Group 40

check the universal joints for play
10 Gearbox and drive axle Clean the breather
11 Steered axle Check knuckle pin bearings See Group 60

tightening torque
12 Brakes Check See Group 70
13 Painting and safety marking Touch up
14 All functions Test-drive and check
15 (Air conditioner) Check the refrigerant level.

Clean the fans and condensor See Group 10
flanges.
16 Lubrication points, oil and filter

changes in accordance with the
Lubrication chart.
17 Hydraulic pressure Check and adjust if necessary.
18 600 and 200 hours service
IMPORTANT!
9407
Oil and lubricant recommendations
Oil quality Rekommended viscosity at different outer temperatures
°C -30 -20 -10 0 +10 +20 +30 +40 +50

°F -22 -4 +14 +32 +50 +68 +86 +104 +122
Engine Engine oil 5W 30

Cummins ACEA: E2
Scania API: CF4 10W 30
Volvo
15W 40
Gearbox Transmission oil

Clark 32000 ATF DEXRON II ** DEXRON II
Clark 36000 MIL-L-2410 C/D *** SAE 10

Clark 40000 C-2, C-3
Drive axle Hypoid oil
SAE 75W 140
Kessler API GL5
Meritor (Rockwell) MIL-L-2105B SAE 80W 90
SAE 90
SAE 85W 140
Hydraulic system Hydraulic fluid * ISO-L HV32

ISO 6743/4
ISO-L HV46
ISO-L HV68
Brake system Hydraulic fluid ****

only machines with DONAX
separate tank for
brake system
* Additive: 6% LUBRIZOL LZ9990A

Do not apply to all drive axles,
see machine card and signs.
** DEXRON is a registered Trade Mark Oil in rotator reduction gear and top-lift
*** DEXRON-oils must not be used Brake
for Clark 36000/40000 Quality: Ordinary hydraulic fluid without additve,
**** Without additives
Planetary gear
Quality: API GL-5
Viscosity: SAE 80W-140
Above +30°C or heavy duty: SAE 320
Grease
IMPORTANT! Use EP universal grease to NLGI Grade 2 with 3–5% molyb-
Any deviations from the above table must denum disulphide additive for all lubrication points, including
be supported by written approval from wheel bearings.
Kalmar Service. Grease for Plastic plates
Use grease recommended by Kalmar. Ordered from Kalmar’s
Spares department.
0,65 kg cartridge for grease gun Art. no 923110.0360
5 kg can Art. no 923595.0003
Coolant for air conditioning unit
ZXL100 Seltec PAG oil

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00 General

10 Chassis and cab

Technical 20 Electrical system

Operation and other matters that are

80 Boom and attachment

Publ. Nr 920 937 9407 02-03

IMPORTANT! Continued on next page

For information that facilitates the working process or

N.B. Draws attention to useful information that

chines with hydraulically moveable cab. Optional on

Transport position A. Quick evacuation valve, accumulators

Safety instructions for working with tyres

z Tyre changing can be dangerous and should only be z Rim inspection

z Deflation and dismantling z Assembly and inflation

DRD420-65S5 with 20-40’ adjustable top lift

The Volvo six-cylinder turbocharged engine, combined with a

The engine is equipped with:

z Gearbox with torque converter

z Drive axle with two-stage reduction - in the differential and the

z Hydraulic system, that occurs in two versions:

z Steered axle with pendulum mounting and double-acting

Spare parts catalogue

Replacement system - Spare parts

The values specified inTable 1 are applicable to nut-and-bolt

Quality 8,8 10,9 12,9

To reduce the risk of settlement of the material and the

Quality 8,8 10,9 12,9

Quality 8,8 10,9 12,9

1 889 791 1005 1260 1480

Quality 8,8 10,9 12,9

1 937 834 1058 1320 1560

Kilowatt Horsepower (metric) Horsepower

z Cooling effect 6-8,5 kW

*) Refrigerant R12 is no longer in production due to legislation

1. Steering column with control levers and switches, ECS-terminal

Lit lamps at container lift:

Overriding of the safety Override

Hydraulics control unit

Overriding of the safety system is carried out at your own

Changing the fresh air filter

Check and lubrication of brake pedal

1. Wiper arm fitting

Air conditioning unit

The equipment is controlled by switches and controls on the in-

The heating and ventilating system

1. Liquid receiver/filter dryer A High-pressure gas

Liquid receiver with filter-dryer

The liquid refrigerant should be completely evaporated before it

1. Start the engine and start the air conditioner.

IN CAB UNIT CONDENSER UNIT

Alternator rating 1920 W

Starting battery voltage 24 V (2 x 12 V)

1. Sensor, outgoing revs (ECS or reversing block)

Checking the electrolyte level of the batteries

Starting from another battery

Connect the jumper cables in the following order:

1. Motor and compressor

Kalmar’s ECS - Electronic Control System - is a modular control

ECU 1 1) ECU 2 ECU 3 1)