Series II Wheel Loader
Series II Wheel Loader
Series II Wheel Loader
Series II
Wheel Loader
✔ New feature
2
Structures Application Truck Match Buckets and Bucket Match
The integrated structural components of Increased performance and good pass A wide selection of ruggedly designed
the 990 Series II provide a stable, well- matching make the 990 Series II a buckets along with a variety of edge
balanced system. The full box-section versatile performer. pg. 9 and tip options allow you to match the
rear frame, four plate loader tower, machine to the job. pg. 10
Z-bar loader linkage and solid steel lift
arms work together to enable a loaded
bucket to move smoothly through the
lift and dump cycle. pg. 8
3
Power Train
990 Series II power train components give you the dependable performance
expected from Cat wheel loaders.
1
100% Rimpull
Selected
Left Pedal
20% Rimpull
Selected
Brakes
20% Rimpull
3
Impeller Clutch Torque Converter
(ICTC). The converter allows the
operator maximum flexibility in
modulating rimpull. The first inch of
4
travel of the left brake pedal is used to
modulate rimpull from 100 percent
(pedal at rest position) to 20 percent of
maximum (pedal depressed about
25 mm. Once 20 percent of maximum
rimpull is achieved, the brake is
applied. This gives smooth transitions
from brake-on to brake-off, yielding
fast, fluid loading cycles. The torque
Caterpillar® 3412E Engine. Is rated 3412E Electronic Control. Provides
converter also has a standard lock-up
at 463 kW (620 hp) at 2,000 rpm. many benefits:
clutch for fast, fuel efficient load and
The Hydraulically actuated, ■ Automatic altitude derate
carry cycles.
Electronically controlled Unit Injector ■ Elevated low idle
■ The new Rimpull Control System has
(HEUI) fuel system and Electronic ■ Cold mode start for improved cold
four factory preset reduced rimpull
Control Module (ECM) deliver power weather starting
settings. Each setting corresponds to a
and efficiency in the most demanding ■ Acceleration delay on startup to
maximum allowable impeller clutch
applications. reduce engine wear
pressure.
■ Advanced diagnostic capabilities
1 Aftercooler. Lowers inlet charge ■ Rimpull Control System allows the
■ ADEM II
temperature and reduces thermal operator to vary rimpull based on
■ Automatic control of ether aid
stresses that can cause premature operating conditions for maximum
wear of pistons, rings and liners. 3 Oil-Cooled Pistons and Full-Length, productivity while reducing tire
Water-Cooled Cylinder Liners. slippage and resulting costs.
2 High Injection Pressures. ■ Converter de-clutches during
Provide maximum heat transfer for
Independent of engine speed,
longer component life. directional shifts. This allows full
decreases smoke and emissions while
throttle directional shifts maintaining
improving response. 4 Engine Oil Cooler. Maintains
hydraulic speeds.
optimum oil temperature for proper ■ Smooth approach to trucks and
Variable Injection Timing and Duration.
cooling and lubrication.
Improves fuel efficiency, improve hoppers builds operator confidence,
■ Engine cooling is provided by a
cold starting, and decrease smoke producing faster cycle times.
Multi-Row Modular radiator. ■ Lock-up feature provides “direct
and emissions.
Hydrostatic fan drive gives the
drive” for load and carry applications.
Injection Rate Shaping. Reduces standard cooling package 110° F
No converter slip means higher
emissions and reduces engine noise. ambient capability.
efficiency and lower fuel costs.
■ 500 hour oil change with the use
Fewer Mechanical Parts. Improve
of CH-4 oil.
reliability.
4
5
6
5 Impeller Clutch. Modulates the Planetary, Electronic, Power Shift Axle-Shaft, Oil-Disc Brakes. Are fully
amount of engine power sent to the Transmission. This is the same hydraulic, completely sealed and never
wheels. transmission found in the 992G. need adjustment. Disc face grooves
Electronic shifting provides smooth provide cooling even when brakes are
6 Lock-Up Clutch. Provides direct
consistent shifts with fingertip controls applied for a long, fade resistant life.
drive for improved fuel economy.
housed in the STIC controller. Large ■ This design provides a larger cooling
With Electronic Clutch Pressure
diameter perimeter clutches coupled oil reservoir and thicker separator
Control, the impeller clutch torque
with high contact planetary gear sets plates than conventional brake
converter with lock-up feature
provide high torque carrying capacity designs. This gives the brake higher
activates in second and third gears
for long trouble-free life. Speed and heat dissipation rates giving it
forward and first through third gears
direction controls are housed in the higher capacity than conventional oil-
in reverse.
STIC controller. disc brakes.
ICTC. ■ The location of the brake reduces
5
Cooling System
Works with the engine to meet emissions standards as well as improve serviceability and
reduce downtime.
1 AMOCS Cores
1 2 ATAAC Cores
2
3 3 Isolation Shield
4 Hydraulically
Driven Fan
Advanced Modular Cooling System Separated Cooling System. The 3412 AMOCS Serviceability. Is a key feature
(AMOCS) with Air-to-Air Aftercooling EUI engine has a separated cooling of AMOCS. Tubes are welded to a
System (ATAAC). In order to meet system which isolates the AMOCS large, thick header, providing the
97/68/EC, Stage II emissions radiator and demand fan from the strength of the tube-to-header joint that
requirements, the software for the 3412 engine compartment. The cooling reduces the possibility of coolant leaks.
HEUI engine has been changed and the system is isolated from the engine The AMOCS modular core design
cooling system has been upgraded to an compartment by a shield allowing the allows removal of a single core without
AMOCS that utilizes the ATAAC radiator to receive outside ambient air removing the entire radiator – reducing
system to achieve lower particulate, through the side and top vents at a much downtime through ease of
NOx and sound output. The proven lower temperature than the hot air from serviceability. Replacing the individual
AMOCS system is currently used on the engine compartment. This improves core also reduces repair costs.
other Caterpillar models such as the the system’s efficiency and allows the
Two-Pass System. Is an AMOCS
834G, 854G, 988G and 992G. ATAAC radiator size to be decreased and the
feature for increased cooling capacity.
technology becomes effective with the rear hood to be sloped, improving the
Coolant travels from the engine to the
834G and 988G introduction. rear viewing area. Also, sound levels
fan side of the bottom tank, up the fan
are reduced due to the lower fan speed
ATAAC System. Provides a separate side of each core, over the top, down
of a more efficient cooling system.
cooling system for the intake manifold the engine side of the core, into the
air complementing the engine jacket AMOCS. Is a Caterpillar exclusive engine side of the bottom tank and
water cooling system. The ATAAC technology that improves serviceability back to the engine. The improved
system routes hot compressed air from and increases cooling efficiency by flow pattern allows the coolant to pass
the turbo and cools it with a single pass, 22 percent. Ambient working through the radiator twice for better
air-to-air aluminum heat exchanger. The temperature for the standard cooling. The AMOCS design improves
cooled compressed air is then delivered 990 Series II is 43° C. A high ambient serviceability, reduces downtime and
to the engine intake manifold. Providing cooling package, with a 50° C capacity, increases cooling capability.
the engine with cool compressed air is available as an attachment.
greatly reduces the emissions produced,
meeting Tier 2 requirements for a
cleaner environment.
6
Hydraulic System
Powerful hydraulics are the invisible force behind the loader’s muscle and flexibility.
Two Separate Hydraulic Systems. High Pressure Hydraulic System. Hydrostatic Cooling Fan. Is used for
Improve the cooling and help prevent With main lift/tilt relief of 31 000 kPa. engine, transmission and hydraulic
cross-contamination. One system is for Main lift/tilt controls are driven by cooling. A variable displacement
lift/tilt and brakes, while the other is for fixed displacement piston pumps built pump drives the fan’s hydraulic motor
the steering and engine cooling fan. If by Caterpillar for optimum pressure was so that fan speed varies with engine
one system runs hot or is contaminated, increased for better response. XT-3 and rpm. With the optional high ambient
the other will be unaffected. XT-5 hose is used on the entire machine cooling package, the pump increases
except for the pilot lines and reusable output as temperatures increase for
Fast Cycle Times. With a high pressure
coupling with o-ring face seals are greater cooling capability. The fan
system make the 990 Series II
reliable and reduce the risks of leaks. draws only the power needed for
remarkably productive. Just 9.2 seconds
cooling, reducing fuel consumption
to raise, 2.9 seconds to dump and 3.8 Load-Sensing Steering System.
and increasing efficiency.
seconds to lower. Maximizes engine power with a
variable displacement piston pump and
full-flow filtering. Typical steering
systems can draw more than 30 kW
(40 hp) from the engine. The draw is
constant even when the operator is not
steering. The system maximizes
performance by directing power
through the steering system only when
it is needed. For example, in hard
digging, when the machine is not
steering, all engine power is available to
generate crowd, breakout and lift forces.
More efficient use of power results in
decreased fuel consumption and higher
production.
7
Structures
Superior construction means superior strength.
1 2
8
Application Truck Match
Matched payloads and matched buckets ensure optimum performance.
6 pass
990 Series II Dump Clearance and
3 pass
35 40 45 50 55 60 65 70 75 80 Metric Tons
Truck Payload
773E = 54 Metric Tons nominal payload (3 pass)
775E = 63 Metric Tons nominal payload (4 pass)
777D = 73 Metric Tons nominal payload (6 pass)
9
Buckets and Bucket Match
Caterpillar buckets and Ground Engaging Tools provide the flexibility to match the machine.
Proper bucket and application match delivers increased stability and peak performance.
1 5
4 7
6
3
Buckets. For the 990 Series II range Heavy-Duty Quarry Bucket. Is available Buckets and Ground Engaging Tools
in size from 8.4 m3 to 9.2 m3 and may as an 8.6 m3 capacity bucket and is (GET). The 990 Series II offers a variety
be configured for a variety of impact recommended for use in face loading of bucket types and available GET
and abrasive conditions. All buckets are where moderate abrasion and high configurations to properly configure
built with shell-tine construction (1) that impact is encountered. It features the machine based on material density,
resists twisting and distortion and additional wear protection items, impact and abrasion.
feature replaceable, weld-on wear plates including: thicker base edge and
Depending on your material densities,
to protect the bottom of the bucket. adapters (5), additional liners and wear
there is an 8.4 m3 Spade Nose bucket
The integral rock guard (2) helps plates (6), bolt-on half arrow segments
with teeth and bolt-on segments for
retain big loads while heavy-duty pins (7), and four sidebar protectors.
improved performance and edge
and retainers (3) provide durability.
High Abrasion Bucket. Is available as protection available.
Spade-Edge Rock Buckets. With bolt- an 8.6 m3 capacity bucket and is
Increased full turn static tip load,
on segments are available in 8.4 m3, recommended for use in face loading
horsepower and hydraulic capabilities
8.6 m3, 9.2 m3. Each accepts up to two where high abrasion and moderate
allow the 990 Series II to effectively
sets of sidebar protectors (4), features impact is encountered. This bucket
utilize the 8.6 m3 and 9.2 m3 bucket size
shouldered, double-strap adapters, features additional wear protection
in lighter materials such as limestone.
easily changed bolt-on segments and items including: independently attached
All buckets feature the well proven
several tip options. edge and adapter covers, additional
shell-tine construction.
liners and wear plates, one set of
Straight-Edge Buckets. Are available in
sidebar protectors and a thicker base To better match your 990 Series II
8.6 m3. Straight-edge rock buckets
edge. to material conditions, contact your
feature shouldered, double strap
Caterpillar dealer for specialty
adapters and accept two sets of side bar
bucket needs.
protectors, bolt-on segments and tips.
10
Two Lever Bucket Controls. Feature
pilot-operated lift and tilt circuits for
lower lever efforts.
Lift Circuit. Has four positions: raise,
hold, lower and float and the automatic
kickout from horizontal to full lift is
adjustable.
Tilt Circuit. Features three positions:
tilt back, hold and dump. The automatic
bucket positioner can be adjusted to
the desired loading angle and does
not require visual spotting.
Standard
3
m
Material Density
Changes in bucket weight, including field installed wear iron, can impact rated payload. Consult your Caterpillar dealer for
assistance in selecting and configuring the proper bucket for the application. The Caterpillar Large Wheel Loader Payload Policy
is a guideline intended to maximize wheel loader structural and component life.
11
Operator’s Station
Comfort and control – top quality operator’s station will help maximize productivity.
11
5 6
1 4 7
8
12
1 STIC Control System. Is a
revolutionary system that integrates
steering and transmission into a
single controller. Simple side-to-side
motions of the operator’s left arm 12 9
turn the machine right or left.
Transmission shifting for forward,
neutral, reverse is controlled by the
10
operator’s fingers and gear selection
is controlled by the operator’s thumb.
These factors combine to produce a
fluid motion that reduces effort and
allows the operator to work the
machine for long periods of time with
little or no fatigue.
2 Left Pedal. Operates the impeller
clutch torque converter for
6 Axle Temperature Sensor. Detects 10 Optional Payload Control System II.
approximately the first inch of travel,
and warns the operator of extreme Offers on-the-go weighing to assist
then engages the brakes.
axle cooling oil temperature through in loading trucks more accurately. It
3 Comfort Series Seat. With air indicator light. also has easy computer download
suspension and retractable seat belt, capability.
7 Throttle Lock. Allows the operator to
is designed for comfort and support.
preset the engine speed for a variety 11 Payload Control System II Monitor.
Seat cushions reduce pressure on the
of applications. Is used by the operator to keep track
lower back and thighs while allowing
of Payload Control System II
unrestricted arm and leg movement. 8 Rimpull Control System Switch.
information.
The seat has three height levels. Turns the Rimpull Control System on
The retractable seat belt remains and off. 12 Optional Ride Control System.
off the floor and is easy to reach. Is used in roading, load and carry
9 Rimpull Control System (RCS). Device
and other applications where load
4 Floor-Mounted Hydraulic Controls. has four factory preset reduced
retention, spillage and operator ride
Adjust fore and aft, with a height- rimpull settings. Each setting
may be a problem. It provides lift
adjustable armrest so operators of any corresponds to a maximum allowable
arm suspension system by placing
size can find a comfortable operating impeller clutch pressure and is user
an accumulator in the lift arm
position. programmable. When in the reduced
circuit.
rimpull mode, the left brake pedal
5 Caterpillar Monitoring System
modulates rimpull from the reduced Quick-Shift Feature. Allows quicker
(EMS-III). Continually monitors
setting (pedal at rest position) to 20 cycle times by shifting from first
various machine systems through
percent of maximum. This gives the forward to second reverse.
three instrument clusters and provides
operator a quick way to return to
a three-level warning system to alert Bucket Controls. Feature pilot-operated
the desired reduced rimpull setting
the operator of immediate or pending lift and tilt circuits with a two lever
and makes the entire first inch of
problems. It shares information with controller that is floor-mounted and
pedal travel available for modulating
the engine, hydraulic and adjustable.
the reduced rimpull.
transmission controls that can be used
Lift Circuit. Has four positions: raise,
during servicing to simplify service
hold, lower and float. It can adjust the
and troubleshooting.
automatic kickout from horizontal to
full lift.
13
Serviceability
Easier maintenance and enhanced serviceability give you more time in the pile.
5
1
4 2
7
3 4
Easier Maintenance and Repair. U-Joints. Are lifetime lubricated, 5 Hinged Doors. In the platform provide
Through monitoring key functions and leaving the slip joint as the only access to the hydraulic tank fill,
logging critical indicators. Electronic driveline component needing grease. lift/tilt and steering filters,
diagnostic access is possible with a transmission filler spout and dipstick.
3 Lube Points. Are centralized in
single tool, the Electronic Technician.
accessible locations. Fuel fill is 6 Shock Resistant Lights.
In addition to the servicing features
located on the left side. Both lube Are replaceable by hand, not
built into the engine, the 990 Series II
points and fuel fill are accessible requiring the use of any tools.
includes:
from ground level, making lube and
7 Batteries. Are accessible through
1 Daily Maintenance Checks. fuel service quicker and easier.
hinged doors on the left-hand side of
Most can be performed from the left
4 Swing-Out Doors. On both sides of the bumper.
side of the machine, making it part of
the engine compartment provide easy
an easy pre-start routine. Routine 8 New Larger Fuel Tank. Provides
access to the engine oil dipstick and
maintenance promotes long service 10 hours of production with a one-
filler spout, S•O•SSM port, fuel filters,
life and durability. hour reserve.
air conditioner compressor, engine oil
2 Advanced Modular Cooling System. filters, alternator, starting receptacle, 9 Caterpillar Monitoring System
Allows service technicians to replace air filter service indicator, coolant fill (EMS-III). Provides operators and
individual cores for enhanced and ether starting aid. The disconnect service technicians with diagnostic
serviceability. Maintenance is also switch and diagnostic connector are information on the machine’s major
simplified since AMOCS is isolated located on the bumper next to the left components and systems.
from the engine compartment. side egress.
Diagnostic Connector. Enables quick
evaluation of 11 starting and charging
functions.
14
Complete Customer Support
Cat dealer services help you operate longer with lower costs.
Machine Selection. Make detailed Product Support. You will find nearly Maintenance Services. Choose from
comparisons of the machines under all parts out our dealer parts counter. your dealer’s range of maintenance
consideration before purchase. Cat Cat dealers use a worldwide computer services when you purchase your
dealers can estimate component life, network to find in-stock parts to machine. Repair option programs
preventative maintenance cost and the minimize machine downtime. Save guarantee the cost of repairs up front.
true cost of lost production. money with genuine Cat Reman parts. Diagnostic programs such as S·O·SSM
You receive the same warranty and and Coolant Sampling and Technical
Purchase. Look past initial price.
reliability as new products at cost Analysis help you avoid unscheduled
Consider the financing options
savings of 40 to 70 percent. repairs.
available as well as the day-to-day
operating costs. Look at dealer services Operation. Improving operating Replacement. Repair, rebuild or
that can be included in the cost of the techniques can boost your profits. replace? Your Cat dealer can help you
machine to yield lower equipment Your Cat Dealer has training evaluate the cost involved so you can
owning and operating costs over the videotapes, literature and other ideas make the right choice. Complete
long run. to help you increase productivity. Customer Support Cat dealer services
help you operate longer with lower
Customer Support Agreements.
costs.
Cat dealers offer a variety of product
support agreements and work with
customers to develop a plan that best
meets specific needs. These plans can
cover the entire machine, including
attachments, to help protect the
customer’s investment.
15
High Lift Arrangement Optional Attachment
Offers high dump clearance and longer reach than the standard Cat 990 Series II.
High Lift Arrangement. Provides up to Truck Match. Designed for use with Buckets. Achieve full capacity in
566 mm more dump clearance at full lift Caterpillar 775 and 777 off highway aggregate and quarry applications with
and 45 degree discharge than the trucks, either standard or equipped with the 8.6 m3. Buckets feature shell-tine
standard 990 Series II, and 294 mm sideboards. The 990 Series II high lift construction with replaceable bolt-on
more forward reach than the standard allows users to match larger trucks wear plates, pin-on side protectors and
arrangement. without the “larger loader” investment. integral rock guard.
■ Helps ensure heaped and centered ■ 990 Series II high lift four passes the 1 Clearance at full lift and 45 degree
loads for less haul road spillage and 775 and six passes the 777. dump, standard lift
higher productivity. ■ High lift buckets are interchangeable 2 Reach at full lift and 45 degree dump,
■ Loading time is reduced as a result of with standard arrangement buckets. standard lift
faster dump cycles due to better dump 3 Dump clearance at full lift and
clearance and reach. 45 degree dump, high lift
4 Reach at full lift and 45 degree dump,
high lift
See charts on pages 20-21 for dimensions.
16
Engine Operating Specifications
Cat 3412E diesel engine
Rated Payload 15 tonnes
Gross Power 503 kW/675 hp ■ These ratings apply at 2000 rpm Operating Weight 76 484 kg
Flywheel Power when tested under the specified
Bucket Capacity Range 8.4-9.2 m3
ISO 9249 463 kW/620 hp standard conditions for the specified
standard.
EU 80/1269 463 kW/620 hp ■ Net power advertised is the power
Bore 137 mm available at the flywheel when the
Stroke 152 mm engine is equipped with fan, air
Displacement 27 Liters cleaner, muffler and alternator.
■ Engine meets 97/68/EC, Stage II
■ No derating required up to 2500 m Hydraulic Cycle Time
altitude.
emission requirements.
Seconds
Raise 9.2
Dump 2.9
3500
Lower Float Down (Empty) 3.8
Total Hydraulic Cycle Time 15.9
Engine Torque (Nm)
3000
2500
2000
1500
1000
500
-500
600
Transmission Loader Hydraulic System
500
Engine Power (kW)
400
Converter Drive Main hydraulic system
300
Forward km/h output at 2128 rpm
200
1 7.0 and 6900 kPa 650 L/min
100
250
Pump Output at 2000 rpm
200 3 22.8
and 6900 kPa 46 L/min
150
Direct Drive Relief valve setting
100
Forward (low idle) 2400 kPa
50
1 Lock-up Disabled
0
500 1000 1500 2000 2500 2 12.8
Engine speed (rpm) 3 22.4
Gross
Net
Reverse
1 7.9
2 14.1
3 24.8
■ Based on 2 percent rolling resistance
and 41.25/70-39 L-5 tires.
Maximum single-wheel rise maintained and tested with ■ 45/65 R39 X Mine D2 (Michelin)
High Lift
Standard
Reach
High Lift
Standard
Dump
Clearance
B-Pin
High Lift
Supplemental Specifications
Heaped Capacity m3 – – – –
8.6 8.6 – – – – –
kg kg
Buckets see pg. 10 Oil change system 5
Bucket attachments: Payload control system II 32
Side bar protectors (set of 2) 45 Ride Control System 180
Bucket teeth, long (set of 8) 145 Supplemental steering 71
Bucket teeth, short (set of 8) 145 Starting aids
Bucket teeth, HD long (set of 8) 190 Cold weather starting system 180
Fuel system - Fast fill 1 Diesel fuel heater 71
High Ambient Cooling Arrangement 12 Heater, engine coolant 48
High Lift Arrangement 1136 Tires see pg. 18-19
Sound Suppression/Spectator 173