Page 1
Engine
Engine Model Cat®C18 ACERT
®
Gross Power 414 kW 555 hp
Flywheel Power 373 kW 501 hp
Operating Specifications
Operating Weight 49 546 kg 109,249 lb
Rated Payload 11.4 tonnes 12.5 tons
Buckets
Bucket Capacities 6.3 m3–7.0 m
3
8.2 yd3–9.2 yd
3
988H
Wheel Loader
®
®
Page 2
2
988H Wheel Loader
Improved performance and rugged durability combine with operator comfort
for maximum productivity.
Revolutionary design, Caterpillar
®
quality.
Electro-hydraulic controls, increased power
and torque rise, front linkage and unmatched
operator comfort work together for increased
performance and added durability to make
the 988H an innovative, 21st Century large
wheel loader geared for maximum production
in the toughest conditions.
Maintenance and Serviceability
Most daily maintenance checks are
performed from the machine’s left side,
facilitating quick start up. Case drain
filters for main hydraulic, steering and
fan pumps protect against contamination,
and remote pressure taps contribute to
improved serviceability. Easy access to
major components enhance serviceability
and increase uptime. pg. 15
Application Truck Match
Increased performance and good pass
matching make the 988H a versatile
performer. pg. 14
Hydraulics and Electronic Monitoring
Innovative electro-hydraulics play a
key role in performance of the 988H
and provide lower operator effort.
Increased hydraulic efficiency improves
lift and tilt cycle time for reduced overall
cycle time. The tradition of reliable,
high-performance Cat hydraulics
continues. pg. 8
Power Train
The Cat C18 engine with ACERT
®
Technology is U.S. EPA Tier 3/EU
Stage III compliant. The Cat transmission
and impeller clutch torque converter
offer smooth, consistent shifting with
fingertip control. Electronic controls
help increase productivity. pg. 6
✔
Structures and Fabricated Box Boom
The articulated frame design features a
high-torsion, compact, load-absorbing,
front frame and a large, box-section,
engine-end frame. Fabricated boom
and linkage geometry increase dump
clearance, provide improved breakout
and lift forces and increase the viewing
area to the bucket corners. pg. 4
Page 3
✔ New Feature
3
Customer Support
Your Cat dealer offers a wide range of
services that help you operate longer
with lower costs. pg. 16
Bucket Match
Improve machine performance and
increase stability by selecting the right
bucket for your application and material
density. pg. 13
Buckets and Ground Engaging Tools
(GET)
Choose between 6.3 m3(8.2 yd3) and
7.0 m3(9.2 yd3) capacity buckets, spade
edge and straight edge buckets and
various GET to match job conditions.
Cat buckets retain the proven shell-tine
construction design for unmatched
durability. pg. 12
Operator Station
Experience a high level of efficiency,
comfort and productivity with one-hand
STIC operation, a large cab, low-effort
fingertip lift and tilt controls, improved
operator visibility, reduced sound levels,
improved ventilation and easier entry
and exit. pg. 10
Page 4
Structures. Combine the use of robotic
welding and castings in critical highstress areas. More than 90 percent of
the 988H structure is robotically welded
to provide highly consistent welds and
increased strength. Castings are also
used in several areas to increase strength
by helping to spread the loads and reduce
the number of parts.
1 Full Box-Section Frame. Has been
improved for maximum strength and
minimum weight. The frame rail is now
extended further forward, improving
rail to hitch strength.
2 Box-Shaped Tower. Is designed
for improved resistance to twisting
for maximum strength. The tilt cylinder
tower’s high-strength steel plates direct
stress down to the lift cylinder case
mounting tube, absorbing impact and
loading forces. This design results in
a narrower tower which gives a better
operator viewing area.
4
Superior design of structures, along with the bold, box-section front linkage
provide superior strength.
Structures and Fabricated Box Boom
Page 5
3 Upper and Lower Hitch Pins. Pivot on
double-tapered roller bearings. The hitch
plates are shaped to direct stress away
from the end of the weld, resulting in
a smoother transition of stress loads
into the frame.
4 Spread-Hitch Design. Increases the
spread 26 percent to help square-up the
frame and provide increased clearance
for access to the hitch and hydraulic lines.
5 Steering Cylinder Mounts. Are located
on the axle pads to provide efficient
transfer of steering loads to the axle.
6 Fabricated Box Boom. Replaces the
traditional steel plate lift arms found
on wheel loaders. This design features
forked ends for easier service, faster
assembly and increased reliability.
Castings in high stress areas smooth
the transition of stress distribution for
excellent service life. The boom and dual
bucket links work together for increased
breakout force, better torsional resistance
and higher lift capacity.
Fabricated Boom Box-Section Design.
Has more torsional stiffness than a Z-bar
design. With the parallel lift arm design,
corner loading the bucket sends stresses
up the lift arm, through the cross tube
welding and up the other lift arm.
The box-section design spreads stresses
over the full length and perimeter of the
boom, allowing stress transfer through
parent material. This resists twisting
and prevents stress paths that can
lead to cracking.
Weld Joint
Load Path
Load Path
(Full Length)
5
Page 6
1 Cat C18 Engine with ACERT
®
Technology. Is U.S. EPA Tier 3 and
EU Stage III compliant. It features
increased horsepower and efficient fuel
management for quick response, high
productivity and exceptional service life.
A new, sculptured cylinder block provides
greater strength and lighter weight.
988H Fuel Management System.
The Cat 988H Wheel Loader Fuel
Management System delivers solid
productivity and fuel savings of as much
as 15 percent in truck loading and more
in load in carry operations. By lowering
engine speed during all but the digging
portion of each cycle, the proprietary
system minimizes impact on productivity
while gaining significant fuel savings.
For maximum flexibility, the system
offers three different operating modes:
full power, balanced and maximum fuel
savings. The system allows the operator
to quickly adjust to changing production
demands by moving a single switch
mounted in the cab.
The Fuel Management System can
be retrofitted to 988H Wheel Loaders
already working in the field.
Mechanically Actuated, Electronic Unit
Injection (MEUI). Proven high-pressure,
direct injection fuel system electronically
monitors operator demands and sensor
inputs to optimize engine performance.
Air Cleaners. Are dry-type radial seal
with primary and secondary elements
and precleaner.
ADEM™ IV. Controls the fuel injector
solenoids to monitor fuel injection.
This system provides automatic altitude
compensation, air filter restriction
indication and it will not allow the
engine to fire until it has oil pressure,
acting as cold start protection and
a form of pre-lube.
Air-to-Air Aftercooler (ATAAC).
Provides a separate cooling system for
the intake manifold air. The ATAAC
system routes hot, compressed air from
the turbo and cools it with a single pass,
air-to-air aluminum heat exchanger.
The cooled compressed air greatly reduces
the emissions produced, meeting the
EPA Tier 3/EU Stage III requirements.
2 Separate Engine Cooling System.
Isolates the radiator and fan from the
engine compartment for more efficient
cooling and allows for a sloped hood
for an increased viewing area.
6
The Cat power train delivers top performance and durability in tough applications.
Changes to the aftercooler, injectors, bearings and pistons help improve startability,
response, power, emissions and fuel consumption.
Power Train
1
Page 7
Next Generation Modular Radiator
(NGMR). Improves cooling capabilities
by using a parallel flow system with
six cores. Serviceability is improved
with NGMR since there is no top
tank to remove.
3 Electronically Controlled Cat
Planetary Power Shift Transmission.
Features perimeter-mounted, large
diameter clutch packs that control inertia
for smooth shifting and increased
component life.
Demand Fan. The Cat C18 electronic
engine continuously gathers information
to control the demand fan speed and
provides constant net horsepower
regardless of operating conditions.
This compensates for varying fan loads
and enables the machine to maintain
normal system temperatures and reduce
fuel consumption.
4 Impeller Clutch Torque Converter
(ICTC). Combined with the Rimpull
Control System (RCS) allows the
operator maximum flexibility in
modulating rimpull.
• Calibration procedure improved.
• Left pedal modulation improved.
• Wear compensated for by providing
the ability to recalibrate for optimum
left pedal modulation regardless of
torque converter wear.
• Left brake pedal modulates rimpull
from 100 to 25 percent for reduced
tire slippage and wear. After 25 percent
is achieved, further pedal travel
applies the brake.
• RCS allows operator to select from
four preset maximum rimpull settings,
other than 100 percent, that are
available in first gear (90, 80,
70 and 60 percent).
• A lock-up clutch torque converter
provides direct drive efficiency.
Translates into improved fuel
efficiency in certain applications.
Final Drives. Feature planetary reduction
at each wheel. Torque is developed at
the wheel, which offers less stress at the
axle shafts. The planetary units can be
removed independently from the wheels
and brakes.
5 Heavy-Duty Axles. Feature optional axle
oil coolers, permanently lubed universal
joints and stronger axle components in
both the differentials and final drives for
increased performance, serviceability
and durability. Conventional differential
is standard.
Free-Floating Axle Shafts. Can be
removed independent of the wheels
and planetaries for quick and easy
serviceability.
Optional Axle Oil Cooling System.
Features two circuits that circulate oil
from the differentials through an oilto-air cooler and filter and back to the
brakes. This system provides increased
oil life and improves component
performance and durability. The system
automatically turns on and off at a
preset oil temperature.
6 Axle-Shaft, Oil Disc Brakes.
Are adjustment-free, fully hydraulic
and completely sealed. Disc face
grooves provide cooling even when
brakes are applied for long, faderesistant service life.
• Location of the brakes improves
serviceability. The axle shaft brake
design allows brake service while
leaving the final drive intact.
• Axle-shaft brakes require less force
by operating on the low torque side
of the axle. Combined with improved
axle oil circulation for increased
cooling, the oil-enclosed, multipledisc brake design improves durability.
• Parking brake is spring-applied, oilreleased and dry disc. It is mounted
on the transfer gear output shaft.
Manual override is possible to allow
movement of the machine.
Secondary Brakes. Are fully modulated
and the front and rear service brake
circuits are isolated so one circuit
can operate if pressure drops in
the other circuit.
Service Brakes. Are four-wheel,
hydraulic, oil-dipped, multiple disc
brakes that are adjustment-free,
completely enclosed and allow
modulated engagement without
slack adjusters.
B
r
a
k
e
s
(
2
0
%
R
i
m
p
u
l
l
)
100% Rimpull
Selected
Left Pedal
20% Rimpull
Selected
7
Page 8
1 Electro-Hydraulic Control System.
Increases hydraulic efficiency and
enhances operator comfort through
low-effort, fingertip controls. XT-3™
and XT-5™ hose along with reliable
components reduce the risk of leaks
and blown lines, helping protect
the environment.
2 Lift and Tilt System. Consists of
larger bore lift and tilt cylinders and
a two position main hydraulic pump,
contributing to increased performance
and serviceability.
Two Position Main Hydraulic Pump.
Is controlled by the Electronic Control
Module (ECM). A solenoid valve
controls the pump displacement, allowing
the ECM to adjust hydraulic flow during
the loader cycle. This strategy results in
fast hydraulics and greater lift forces,
leading to optimized performance.
3 Load Sensing Steering. The STIC
control system integrates the steering
and transmission into a single controller.
A STIC operated, pilot valve controls the
flow to steering cylinders. The steering
system utilizes a variable displacement
pump for maximum machine performance
by directing power through the steering
system only when needed.
4 Case Drain Filtration. A total of
three filters for the main hydraulic,
steering and fan pumps protect against
contamination with easy access
for service.
8
Efficient, well-balanced hydraulics and low-effort electronic controls mean high
performance and exceptional durability.
Hydraulics and Electronic Monitoring
1
Page 9
5 Demand Fan. A speed controlled,
hydraulic fan provides maximum
cooling efficiency by directing the
appropriate amount of power through
the fan system based on the system’s
temperature.
Advanced Electronics. Play a major
role in the operation of the 988H.
Productivity improvements, enhanced
serviceability, increased operator
efficiency and lower costs are direct
benefits of the 988H advanced
electronics.
6 Caterpillar Monitoring System (EMS-III).
Continually monitors various machine
systems through three instrument clusters
and provides a three-level warning
system to alert the operator of immediate
or pending problems. It shares information
with the engine, hydraulic and transmission
controls that can be used during servicing
to simply service and troubleshooting.
The Caterpillar Monitoring System also
allows for new software to be uploaded
directly into the cab.
Optional Payload Control System.
Tracks data regarding the load in the
bucket. It also features a numeric keypad
and easy to view display. An available
printer makes onboard ticket printing
possible.
Optional Ride Control. Provides a
boom suspension system by placing
two accumulators in the boom circuit,
reducing fore and aft pitch over rough
terrain. This results in a smoother,
more comfortable ride, allowing higher
load and carry speeds, increased load
retention and component life.
Loose Material Mode. Provides maximum
hydraulic speed and efficiency for loading
in easily penetrated loose material.
9
6
Page 10
World Class Cab. Over 3.18 m3(112 ft3)
of volume incorporates innovations for
operator comfort, maneuverability and
productivity. Features include outstanding
viewing area, excellent cab ventilation,
interior sound levels below 77 dB(A),
standard coat hook, cup holder, storage
bin, intermittent wet-arm wipers, room
for a large lunch cooler and radio and
Cat Product Link ready.
10
An industry standard for comfort and efficiency.
Operator Station
15
5
8
16
6
4
3
2
1
Page 11
1 STIC Control System. Combines gear
selection and steering into one control
lever that requires less effort and
provides smooth shifting. Side-to-side
motions for steering, finger operator
direction control and thumb operator
buttons for gear selection combine to
provide 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/braking while
the right pedal operates standard braking.
3 Cat Comfort Seat. An ergonomic
design with thick foam in key parts
of the seat back, thick seat cushions
and an automotive-style lumbar support
translates into great operator comfort,
reduced fatigue and consistent
productivity throughout the work shift.
The six-way adjustable, air suspension
seat has a retractable seatbelt, headrest
and adjustable armrests for optimum
comfort.
4 Electro-Hydraulic Controls and
Armrests. Provide low effort, fingertip
control for enhanced comfort and
stability.
Floor-mounted controls and armrests
are fore, aft and height adjustable to
accommodate operators of any size in
a comfortable operating position.
5 Caterpillar Monitoring System
(EMS-III). Provides information on
machine’s major components and
systems.
• Gauge displays fuel tank level
and temperatures for engine coolant,
torque converter and hydraulic oil.
Tachometer is an analog gauge with
digital readout for gear selection and
ground speed.
• Alerts operator if transmission
is engaged while parking brake is
applied. If pressure drops, the parking
brake applies automatically.
Main module consists of 10 fault
indicators and one display panel. If any
critical engine condition is detected, the
engine will derate power.
6 Throttle Lock. Allows operator to
pre-set the engine speed for a variety
of applications, resulting in faster cycle
times and increased productivity.
7 Rimpull Control System (RCS).
Has four factory preset, reduced rimpull
settings (90, 80, 70 and 60 percent of
rimpull). Reduced rimpull settings can
be modified by your Cat dealer to better
match ground conditions.
8 Rimpull Control System (RCS) Switch.
Turns RCS on and off.
9 Kickout Positioner Control. Allows the
operator to set customized upper, lower
and bucket dig angle kickouts for
maximum operating efficiency.
10 Optional Ride Control Switch.
Turns ride control to off or automatic
position.
11 Autoshift. Allows the operator to
set the maximum gear into which the
transmission will be allowed to shift.
This feature contributes to additional
comfort and focus on the job. The switch
also offers a manual position for operator
controlled shifting.
12 Optional Lock-up Clutch Torque
Converter Switch. Activates the lock-up
clutch for direct drive efficiency.
13 Loose Material Operating Mode.
Tailors hydraulics to provide maximum
loose material loading efficiency.
14 Front and Rear Window
Wiper/Washer. Are within easy reach to
help maintain a clear field of vision.
15 Viewing Area. Bonded front windshield
eliminates distracting metal frames for
excellent bucket and work site operator
visibility. An internal ROPS improves
peripheral viewing by eliminating the
large structure outside the cab.
16 Electro-Hydraulic Lock-out Switch.
Disables hydraulic controls.
17 Optional Reversible Fan.
18 Optional Hazard Lights.
19 Optional Rotary Beacon.
20 Optional Autolube.
11
Upper Left Console
Upper Right Console
7
9
20 17
19
18
11
121014
14
13
Page 12
Buckets. Ranging from 6.3 m3(8.2 yd3)
to 7.6 m3(10 yd3) may be configured for
a variety of impact and abrasive
conditions. All buckets are built with
shell-tine construction (1) that resist
twisting and distortion and feature
replaceable, weld-on wear plates to
protect the bottom of the bucket.
The integral rock guard (2) helps retain
large loads while heavy-duty pins and
retainers (3) provide durability.
Spade Edge Rock Buckets. With bolt-on
segments, are available in 6.4 m
3
(8.33 yd3), 6.9 m3(9.0 yd3) and 7.6 m
3
(10 yd3). Each accepts up to two sets of
sidebar protectors (4), feature shouldered,
double-strap adapters, easily changed
bolt-on segments and several tip options.
Straight Edge Buckets. Are available
in 6.3 m
3
(8.2 yd3) Straight Edge Rock
as well as 7.0 m3(9.2 yd3) and 7.6 m
3
(10 yd3) General Purpose configurations.
The Straight Edge Rock bucket features
double strap adapters and accepts
two sets of sidebar protectors, bolt-on
segments and tips. The General Purpose
bucket is available with bolt-on cutting
edge, bolt-on adapters or bolt-on
adapters with segments.
High Abrasion Bucket. Is available
with 6.4 m3(8.33 yd3) capacity and is
recommended for use in face loading
where high abrasion and moderate
impact is encountered. This bucket
features additional wear protection
items including independently attached
edge and adapter covers, additional
liners and wear plates, one set of sidebar
protectors and a thicker base edge.
Heavy Duty Quarry Bucket. Is available
as a 6.4 m3(8.33 yd3) capacity bucket
and is recommended for use in face
loading where moderate abrasion and
high impact is encountered. It features
additional wear protection items
including four sidebar protectors (4),
thicker base edge and adapters (5),
additional liners and wear plates (6)
and bolt-on half arrow segments (7).
Bucket Controls. Feature electrohydraulic lift and tilt circuits for lower
lever effort.
Lift Circuit. Has four positions: raise,
hold, lower and float and can adjust
automatic upper and lower kickouts
from the cab.
Tilt Circuit. Features three positions:
tilt back, hold and dump. It can adjust
automatic bucket positioner to desired
loading angle from the cab and does
not require visual spotting.
Mechanically Attached Wear Plates
(MAWP). Are available as a Custom
attachment.
12
Buckets and Ground Engaging Tools (GET)
Cat buckets and GET provide the flexibility to match the machine to your application.
Page 13
Buckets and GET. The 988H offers a
variety of bucket types and available
GET configurations to properly configure
the machine based on material density,
impact and abrasion.
Depending on your material densities,
the 988H has available a 6.4 m3(8.33 yd3)
Spade Nose bucket with teeth and bolton segments for improved performance
and edge protection.
Increased full turn static tipping load,
horsepower and hydraulic capabilities
allow the 988H to effectively utilize the
6.6 m3(8.7 yd3) and 6.9 m3(9.0 yd3)
bucket size in lighter materials such
as limestone.
To better match your 988H to material
conditions, contact your Cat dealer for
specialty bucket needs.
13
Bucket Match
Proper bucket and application match deliver increased stability and peak performance.
Bucket Selection Guide and Matrix
3
3
yd
m
9.06.9
6.6
8.7
Bucket Size
6.4
8.33
2200
1300 1500 1700 1900
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.
3.88 and 4.25 Meter Linkage
110% 90%
2400 2600 2800 3000 3200 3400 lb/LCY
Material Density
NOTE: Percentages shown represent bucket fill factor
- Center point at 100% fill
100%
110% 90%100%
110%
100%
90%
2000
kg/LCM
Page 14
Performance. The 988H is an aggressive
first gear loader for face and bank
excavation. With increased dump
clearance, the 988H can easily load
37-63 tonnes (40-70 ton) off-highway
trucks. Increased performance and good
pass match make the 988H a versatile
performer with a cost per ton that will
help your bottom line.
The versatility of a material handler
is designed into this wheel loader.
With balanced rimpull and hydraulics,
the 988H is an aggressive loader and
gets the job done quickly and efficiently
in loose or stock-pile material and in
load and carry work.
14
Application Truck Match
Matched payloads and matched buckets ensure optimum performance.
Large Wheel Loader/Truck Application Match
988H Rated Payload: 11.4 metric ton (12.5 short ton)
4 pass
3 pass
988H Dump Clearance & Reach
3.4 m (11 ft 2 in) & 2.0 m (6 ft 10 in)
35 40 45 50 55 60
35
Truck Payload
769D = 36 Metric Tons (40 Short Ton) nominal payload
771D = 41 Metric Tons (45 Short Ton) nominal payload
773E = 54 Metric Tons (60 Short Ton) nominal payload
775E = 63 Metric Tons (70 Short Ton) nominal payload
5 pass
65 7040 45 50 55 60
Metric Tons
Short Tons
Page 15
15
Maintenance and Repair. Is easier
through monitoring key functions and
logging critical indicators. Electronic
diagnostic access is possible with a single
tool, the Cat Electronic Technician (ET).
In addition to the servicing features
built into the engine, the 988H includes:
• Daily Maintenance Checks. Most can
be performed from the left side of the
machine, making it part of an easy
pre-start routine. Routine maintenance
promotes long service life and durability.
• Next Generation Modular Radiator
(NGMR). Allows service technicians to
replace individual cores for enhanced
serviceability. Maintenance is also
simplified since NGMR is isolated
from the engine compartment.
• U-joints and Slipshaft. Are permanently
lubricated.
• Lube Points. Are centralized in
accessible locations. Fuel fill is located
on the left side. Both lube points and
fuel fill are accessible from ground
level, making lube and fuel service
quicker and easier.
• Swing-out Doors. On both sides of
the engine compartment provide easy
access to the engine oil dipstick and
filler spout, S·O·SSMport, fuel filters,
air conditioner compressor, engine oil
filters, alternator, starting receptacle, air
filter service indicator, coolant fill and
ether starting aid. The disconnect switch
and diagnostic connectors are located
on the rear platform.
• Hinged Doors. In the platform provide
access to the hydraulic tank fill, lift and
tilt and steering filters. The transmission
sight glass and filler spout are serviced
from the hitch area.
• Case Drain Filters. Protect the hydraulic
system from contamination and are
conveniently located behind the cab
in the service platform.
• Batteries (1,000 CCA). Sit in a built-in
battery box and are accessible through
tread plates on the right platform.
• Shock Resistant Lights.
Are replaceable by hand, not requiring
the use of any tools.
• Caterpillar Monitoring System
(EMS-III). Provides operators and
service technicians with diagnostic
information on the machine’s major
components and systems. It also allows
for a flashable software using a laptop
and Cat ET instead of replacing a chip
that contains the new software.
• Remote Mounted ECPC Pressure Taps.
Are easily accessible behind the cab
under the platform.
• 500 Hour Oil Change Interval.
Uptime and production are increased
with a longer time between engine
oil changes.
Easier maintenance and enhanced serviceability give you more time in the pile.
Maintenance and Serviceability
Page 16
16
Machine Selection. Make detailed
comparisons of the machines under
consideration before purchase. Cat dealers
can estimate component life, preventive
maintenance cost and the true cost
of lost production.
Purchase. Look past initial price.
Consider the financing options available
as well as the day-to-day operating
costs. Look at dealer services that can
be included in the cost of the machine
to yield lower equipment owning and
operating costs over the long run.
Customer Support Agreements.
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
work tools, to help protect the
customer’s investment.
Product Support. You will find nearly
all parts at our dealer parts counter.
Cat dealers use a world-wide computer
network to find in-stock parts to minimize
machine down time. Save money with
genuine Cat Remanufactured parts.
You receive the same warranty and
reliability as new products but at a
cost savings of 40-70 percent.
Operation. Improving operator techniques
can boost your profits. Your Cat dealer
has training videotapes, literature,
classes and other ideas to help you
increase productivity.
Maintenance Services. More and more
equipment buyers are planning for
effective maintenance before buying
equipment. Choose from your dealer’s
wide range of maintenance services at
the time you purchase your machine.
Repair option programs guarantee the
cost of repairs up front. Diagnostic
programs such as S·O·SSMand Coolant
Sampling and Technical Analysis help
you avoid unscheduled repairs.
Replacement. Repair, rebuild or replace?
Your Cat dealer can help you evaluate
the cost involved so you can make the
right choice.
SAFETY.CAT.COM™.
Customer Support
Cat dealer services help you operate longer with lower costs.
Page 17
17
988H Wheel Loader specifications
Operating Specifications
Rated Payload 11.4 tonnes 12.5 tons
Operating Weight 49 546 kg 109,249 lb
Rated Payload – Standard 11.4 tonnes 12.5 tons
Transmission
Converter Drive – Forward 1 6.7 kph 4.2 mph
Converter Drive – Forward 2 11.8 kph 7.3 mph
Converter Drive – Forward 3 20.8 kph 12.9 mph
Converter Drive – Forward 4 36 kph 22.3 mph
Converter Drive – Reverse 1 7.6 kph 4.7 mph
Converter Drive – Reverse 2 13.5 kph 8.4 mph
Converter Drive – Reverse 3 23.7 kph 14.7 mph
Direct Drive – Forward 1 Lock-up disabled
Direct Drive – Forward 2 12.3 kph 7.7 mph
Direct Drive – Forward 3 21.9 kph 13.6 mph
Direct Drive – Forward 4 38.6 kph 24 mph
Direct Drive – Reverse 1 7.9 kph 4.9 mph
Direct Drive – Reverse 2 14.1 kph 8.8 mph
Direct Drive – Reverse 3 25.1 kph 15.6 mph
• Travel speeds based on two percent rolling resistance
and 35/65-33 tires.
Hydraulic Cycle Time
Raise 9.4 Seconds
Dump 2.4 Seconds
Lower Float Down (Empty) 3.8 Seconds
Total Hydraulic Cycle Time 15.6 Seconds
Service Refill Capacities
Fuel Tank 712 L 188 gal
Cooling System 103 L 27.2 gal
Crankcase 60 L 15.9 gal
Transmission 70 L 18.5 gal
Differentials and Final Drives 186 L 49 gal
– Front
Differentials and Final Drives 186 L 49 gal
– Rear
Hydraulic System (factory fill) 470 L 124.2 gal
Hydraulic System (tank only) 267 L 70.5 gal
Buckets
Bucket Capacities 6.3 m3–7.0 m38.2 yd3–9.2 yd
3
Max. Bucket Capacity 7 m
3
9.2 yd
3
Engine
Engine Model Cat C18 ACERT
®
Gross Power 414 kW 555 hp
Flywheel Power 373 kW 501 hp
Net Power – EEC 80/1269 373 kW 501 hp
Net Power – ISO 9249 373 kW 501 hp
Gross Power – ISO 3046-2 388 kW 520 hp
Bore 145 mm 5.7 in
Stroke 183 mm 7.2 in
Displacement 18.1 L 1,104.5 in
3
• These ratings apply at 1,800 rpm when tested under the
specific standard conditions for the specified standard.
• Power rating conditions based on standard air conditions
of 25° C (77° F) and 99 kPa (29.32 in Hg) dry barometer,
using 35° API gravity fuel having an LHV of 42 780 kJ/kg
(18,390 Btu/lb) when used at 30° C (86° F) [reference a fuel
density of 838.9 g/L (7.001 lb/gal)].
• Net power advertised is the power available when the
engine is equipped with alternator, air cleaner, muffler
and hydraulic fan drive.
• No derating required up to 3048 m (10,000 ft) altitude.
• Direct-electric, 24-volt starting system with 100 amp
alternator and four high performance maintenance-free
batteries with 1,000 cold cranking amps.
3000 2213
2800
•m)Engine Power (kW)
2600
2400
2200
2000
Engine Torque (N
1800
450
400
350
300
250
200
235
230
225
220
215
BSFC (gm/kW-hr)
210
205
Engine Speed (RPM)
Gross
Net
1600 1800 200014001000 1200
2066
1919
1771
1624
1476
1328
603
536
469
402
335
Engine Power (Bhp) Engine Torque (ft•lb)
268
0.385
0.377
0.369
0.361
0.353
BSFC (lb/Bhp-hr)
0.344
0.336
Page 18
18
988H Wheel Loader specifications
Steering
Steering Meets SAE and
ISO standards
Total Steering Angle 86°
• Full hydraulic, load-sensing steering system meets
SAE J1511 FEB94 and ISO 5010:1992 specified standards.
• Center point frame articulation.
• Front and rear wheels track.
Loader Hydraulic System
Main Hydraulic System Output 492 L/min 130 gal/min
at 2,010 rpm and 6900 kPa (1,000 psi)
Relief Valve Setting 31 000 kPa 4,500 psi
Cylinders, Double Acting: 220 × 8.7 ×
Lift, Bore and Stroke 911 mm 35.9 in
Cylinder, Double Acting: 220 × 8.7 ×
Tilt, Bore and Stroke 1770 mm 69.7 in
Pilot System, Gear-Type Pump 76 L/min 20.1 gal/min
Output at 2,010 rpm and
2500 kPa (363 psi)
Relief Valve Setting (low idle) 2400 kPa 348.1 psi
• With SAE 10W oil at 66° C (150° F).
Axles
Maximum Single-Wheel Rise 568 mm 22.4 in
and Fall
Front Fixed
Rear Oscillating ±13°
Brakes
Brakes Meet SAE ISO 3450:1996
Cab
Cab – ROPS/FOPS Meets SAE and
ISO standards
• Cat cab with integrated Rollover Protective Structure (ROPS)
and Falling Object Protective Structure (FOPS) is standard.
• ROPS meets SAE J1040 APR99 and ISO 3471:1994 criteria.
• FOPS meets SAE J231 JAN 81 and ISO 3449:1992 Level II
criteria.
Sound Performance
Meets ANSI, SAE and ISO standards
• The operator sound exposure Leq (equivalent sound
pressure level) measured according to the work cycle
procedures specified in ANSI/SAE J1166 OCT 98 is 76 dB(A),
for the cab offered by Caterpillar, when properly installed,
maintained and tested with the doors and windows closed.
• Hearing protection may be needed when operating with an
open operator station and cab (when not properly maintained
or doors/windows open) for extended periods or in noisy
environment.
• The exterior sound pressure level for the standard machine
measured at a distance of 15 m (49.2 ft) according to the test
procedures specified in SAE J88 JUN 86 mid-gear-moving
operation is 81 dB(A).
• The sound power level is 115 dB(A) measured according
to the dynamic test procedure and conditions specified
in ISO 6395:1998/AMD. 1:1996 for a standard machine
configuration.
• For “CE” marked configurations, the labeled sound
power level is 110 dB(A) measured according to the test
procedures and conditions specified in 2000/14/EC.
• For “CE” marked configurations, the operator sound
pressure level is 73 dB(A) measured according to the
test procedures and conditions specified in 2000/14/EC
Directive and ISO 6396:1992.
Page 19
19
988H Wheel Loader specifications
Dimensions
All dimensions are approximate.
1 Height to Top of Cab 4128 mm 13.54 ft
2 Height to Top of 4112 mm 13.49 ft
Exhaust Stacks
3 Height to Top of Air Cleaner 3382 mm 11.1 ft
4 Height to Top of Hood 3156 mm 10.35 ft
5 Center Line of Rear Axle 3132 mm 10.28 ft
to Edge of Rear Bumper
6 Center Line of Front Axle 2275 mm 7.46 ft
to Hitch
7 Wheel Base Length 4550 mm 14.93 ft
8 Length with Bucket on Ground
♦♦
9 Ground Clearance 549 mm 1.8 ft
10 Height to Center of Wheel 978 mm 3.21 ft
11 C-Pin Height 1009 mm 3.31 ft
899 mm* 2.95 ft*
12 Dig Depth 226 mm 0.74 ft
195 mm* 0.64 ft*
13 Rack Back Angle at Ground 47.8°
45.7°*
14 Rack Back Angle at Carry 56.5°
54°*
15 Clearance at Maximum 3879 mm 12.73 ft
Lift/Dump 3466 mm* 11.37 ft*
16 Height to Spillguard 5432 mm 17.82 ft
5019 mm* 16.47 ft*
17 B-Pin Height 5853 mm 19.2 ft
5440 mm* 17.85 ft*
18 Overall Height with
♦♦
Bucket Raised
♦
*
♦
*
19 Rack Back Angle 65°
at Maximum Lift 73°*
20 Dump Angle at Maximum Lift 45°
45°*
21 Reach
♦♦
*3.88 Meter Linkage
19
1
2
3
4
910
57
8
4.25 Meter Linkage
Dimensions vary with bucket. Refer to Operation/Bucket Specifications.
6
20
17
21
14
13
11
12
15
16
18
Page 20
Operation/Bucket Specifications
20
988H Wheel Loader specifications
3.88 Meter Linkage
Bucket Type Spade Wide
GET Teeth & Segments Teeth & Segments BOCE
Rated Capacity m3(yd3) 6.4 (8.33) 6.9 (9.0) 6.9 (9.0)
Struck Capacity m3(yd3) 5.3 (6.9) 5.7 (7.5) 5.7 (7.5)
Heaped Capacity m3(yd3) 6.4 (8.33) 6.9 (9.0) 6.9 (9.0)
Bucket Width mm (ft/in) 3810 (12'6") 3980 (13'1") 3964 (13'0")
Overall Height mm (ft/in) 7699 (25'3") 7772 (25'6") 7772 (25'6")
Dump Clearance at 45° dump
Bare mm (ft/in) 3742 (12'3") 3682 (12'1") 3638 (11'11")
Teeth mm (ft/in) 3466 (11'4") 3410 (11'2") —
Reach at 45° dump
Bare mm (ft/in) 1494 (4'11") 1554 (5'1") 1881 (6'2")
Teeth mm (ft/in) 2028 (6'8") 2084 (6'10") —
Overall Length
Bare mm (ft/in) 11 877 (39'0") 11 962 (39'3") 11 982 (39'4")
Teeth mm (ft/in) 12 215 (40'1") 12 294 (40'4") —
Turning Radius at SAE Carry
Bare mm (ft/in) 8543 (28'0") 8641 (28'4") 8644 (28'4")
Teeth mm (ft/in) 8597 (28'2") 8689 (28'6") —
Reach at 45° dump
and 2.13 m (7'0") HGT
Bare mm (ft/in) 2389 (7'10") 2427 (8'0") 2840 (9'4")
Teeth mm (ft/in) 2924 (9'7") 2957 (9'8") —
Reach with level boom level bucket
Bare mm (ft/in) 3435 (11'3") 3520 (11'7") 3972 (13'0")
Teeth mm (ft/in) 4198 (13'9") 4277 (14'0") —
Digging Depth – Bucket Level mm (in) 195 (7.7") 195 (7.7") 185 (7.3")
Full Dump at Maximum Lift degrees 51.4 51.4 51.4
Tipping Load
Straight kg (lb) 34 825 (76,776) 34 355 (75,740) 34 635 (76,357)
Articulated 43° kg (lb) 29 368 (64,745) 28 923 (63,764) 29 182 (64,335)
Breakout Force kN (lb-f) 378.4 (85,068) 360.6 (81,066) 383.9 (86,304)
Operating Weight kg (lb) 49 546 (109,230) 49 816 (109,825) 49 716 (109,605)
Weight Distribution at SAE Carry
Front kg (lb) 25 265 (55,700) 25 746 (56,760) 25 540 (56,306)
Rear kg (lb) 24 281 (53,530) 24 070 (53,065) 24 176 (53,299)
Rock Spade Spade
(Standard Bucket) Rock Rock
Page 21
21
988H Wheel Loader specifications
3.88 Meter Linkage
Straight Duty High General
Rock Quarry Abrasion Purpose
Teeth & Segments Teeth & Segments Teeth & Segments BOCE
Heavy
6.3 (8.2) 6.4 (8.33) 6.4 (8.33) 7.0 (9.2)
5.2 (6.8) 5.3 (6.9) 5.3 (6.9) 5.88 (7.7)
6.3 (8.2) 6.4 (8.33) 6.4 (8.33) 7.0 (9.2)
3800 (12'6") 3862 (12'8") 3926 (12'11") 3695 (11'2")
7699 (25'3") 7698 (25'3") 7699 (25'3") 7698 (25'3")
4011 (13'2") 3728 (12'3") 3811 (12'6") 3790 (12'5")
3735 (12'3") 3376 (11'1") 3447 (11'4") —
1526 (5'0") 1543 (5'1") 1577 (5'2") 1720 (5'8")
1765 (5'9") 2076 (6'10") 2047 (6'9") —
11 497 (37'9") 11 917 (39'1") 11 779 (38'8") 11 765 (38'7")
11 839 (38'10") 12 333 (40'6") 12 242 (40'2") —
8550 (28'0") 8605 (28'3") 8625 (28'4") 8573 (28'2")
8634 (28'4") 8678 (28'6") 8682 (28'6") —
2518 (8'3") 2401 (7'11") 2464 (8'1") 2729 (8'11")
2757 (9'1") 2934 (9'8") 2935 (9'8") —
3480 (11'5") 3535 (11'7") 3552 (11'8") 3751 (12'0")
3822 (12'6") 4295 (14'1") 4225 (13'10") —
195 (7.7") 225 (8.9") 195 (7.7") 191 (7.5")
51.4 51.4 51.4 51.4
35 257 (77,728) 32 650 (71,981) 33 833 (74,589) 35 026 (77,219)
29 816 (65,733) 27 239 (60,052) 28 383 (62,574) 29 568 (65,186)
467.4 (105,076) 360.7 (81,089) 389.2 (87,496) 433.1 (97,365)
49 261 (108,602) 51 181 (112,835) 51 016 (112,471) 49 401 (108,910)
24 616 (54,269) 28 161 (62,084) 27 367 (60,334) 24 988 (55,089)
24 645 (54,333) 23 020 (50,750) 23 649 (52,137) 24 413 (53,821)
Page 22
Operation/Bucket Specifications
22
988H Wheel Loader specifications
4.25 Meter Linkage
Bucket Type Spade Wide
GET Teeth & Segments Teeth & Segments BOCE
Rated Capacity m3(yd3) 6.4 (8.33) 6.9 (9.0) 6.9 (9.0)
Struck Capacity m3(yd3) 5.3 (6.9) 5.7 (7.5) 5.7 (7.5)
Heaped Capacity m3(yd3) 6.4 (8.33) 6 .9 (9.0) 6.9 (9.0)
Bucket Width mm (ft/in) 3810 (12'6") 3980 (13'1") 3964 (13'0")
Overall Height mm (ft/in) 8112 (26'7") 8186 (26'10") 8186 (26'10")
Dump Clearance at 45° dump
Bare mm (ft/in) 4155 (13'8") 4095 (13'5") 4051 (13'3")
Teeth mm (ft/in) 3879 (12'9") 3823 (12'7") —
Reach at 45° dump
Bare mm (ft/in) 1591 (5'3") 1652 (5'5") 1699 (5'7")
Teeth mm (ft/in) 2126 (7'0") 2182 (7'2") —
Overall Length
Bare mm (ft/in) 12 321 (40'5") 12 406 (40'8") 12 426 (40'9")
Teeth mm (ft/in) 12 658 (41'6") 12 738 (41'9") —
Turning Radius at SAE Carry
Bare mm (ft/in) 8731 (28'8") 8828 (29'0") 8803 (28'11")
Teeth mm (ft/in) 8787 (28'10") 8879 (29'2") —
Reach at 45° dump
and 2.13 m (7'0") HGT
Bare mm (ft/in) 2785 (9'2") 2825 (9'3") 2951 (9'8")
Teeth mm (ft/in) 3320 (10'11") 3355 (11'0") —
Reach with level boom level bucket
Bare mm (ft/in) 3805 (12'6") 3890 (12'9") 3947 (12'11")
Teeth mm (ft/in) 4568 (15'0") 4647 (15'3") —
Digging Depth – Bucket Level mm (in) 226 (8.9") 226 (8.9") 216 (8.5")
Full Dump at Maximum Lift degrees 48.5 48.5 48.5
Tipping Load
Straight kg (lb) 32 445 (71,529) 32 014 (70,579) 32 264 (71,130)
Articulated 43° kg (lb) 27 191 (59,946) 26 780 (59,040) 27 012 (59,551)
Breakout Force kN (lb-f) 409.2 (91,992) 390.1 (87,698) 415.3 (93,363)
Operating Weight kg (lb) 50 574 (111,497) 50 844 (112,092) 50 744 (111,871)
Weight Distribution at SAE Carry
Front kg (lb) 25 583 (56,401) 26 088 (57,514) 25 874 (57,042)
Rear kg (lb) 24 991 (55,096) 24 756 (54,578) 24 870 (54,829)
Rock Spade Spade
(Standard Bucket) Rock Rock
Page 23
23
988H Wheel Loader specifications
4.25 Meter Linkage
Straight Duty High General
Rock Quarry Abrasion Purpose
Teeth & Segments Teeth & Segments Teeth & Segments BOCE
Heavy
6.3 (8.2) 6.4 (8.33) 6.4 (8.33) 7.0 (9.2)
5.2 (6.8) 5.3 (6.9) 5.3 (6.9) 5.88 (7.7)
6.3 (8.2) 6.4 (8.33) 6.4 (8.33) 7.0 (9.2)
3800 (12'6") 3862 (12'8") 3926 (12'11") 3695 (11'2")
8112 (26'7") 8112 (26'7") 8112 (26'7") 8111 (26'7")
4424 (14'6") 4141 (13'7") 4225 (13'10") 4203 (13'9")
4148 (13'7") 3790 (12'5") 3860 (12'8") —
1623 (5'4") 1641 (5'5") 1674 (5'6") 1818 (6'0")
1863 (6'1") 2173 (7'2") 2145 (7'0") —
11 941 (39'2") 12 358 (40'7") 12 223 (40'1") 12 209 (40'1")
12 283 (40'4") 12 774 (41'11") 12 686 (41'7") —
8738 (28'8") 8795 (28'10") 8812 (28'11") 8763 (28'9")
8824 (28'11") 8871 (29'1") 8873 (29'1") —
2904 (9'6") 2801 (9'2") 2861 (9'5") 3114 (10'3")
3144 (10'4") 3334 (10'11") 3332 (10'11") —
3850 (12'8") 3905 (12'10") 3922 (12'10") 4121 (13'6")
4192 (13'9") 4665 (15'4") 4595 (15'1") —
226 (8.9") 256 (10.1") 226 (8.9") 222 (8.7")
48.5 48.5 48.5 48.5
32 867 (72,459) 30 346 (66,901) 31 421 (69,271) 32 650 (71,981)
27 628 (60,909) 25 130 (55,402) 26 172 (57,699) 27 394 (60,393)
505.1 (113,551) 390.5 (87,788) 421.6 (94,779) 468.3 (105,278)
50 289 (110,868) 52 209 (115,101) 52 044 (114,737) 50 429 (111,177)
24 907 (54,910) 28 634 (63,127) 27 811 (61,313) 25 293 (55,761)
25 382 (55,958) 23 575 (51,974) 24 233 (53,425) 25 136 (55,415)
Page 24
Tire Dimensions/Specifications
24
988H Wheel Loader specifications
Change in
Ground
Width over tires
mm inches mm inches mm inches kg lb kg lb
clearance
vertical
dimensions
Change in
operating
weight
Change
in full
turn static
tipping load
35/65R33 (L-4) Michelin XLDD1 3579 140.9 445 17.5 — — —— ——
35/65-33 42 PR (L-5) Bridgestone D-Lug 3541 139.4 544 21.4 –99 –3.9 2259 4980 1310 2888
35/65R33 (L-4) Bridgestone
V-Steel N Traction VSNT 3566 140.4 483 19.0 –38 –1.5 664 1464 385 849
35/65R33 (L-5) Bridgestone
V-Steel D-Lug VSDL 3566 140.4 498 19.6 –53 –2.1 1257 2772 729 1608
35/65-33 42PR (L-5) General LD 250 Belted 3487 137.3 506 19.9 –61 –2.4 1510 3328 876 1930
875/65R33 (L-4) Goodyear RL-4K Hi Stability 3487 137.3 506 19.9 –61 –2.4 552 1217 320 705
35/65R33 (L-5) Goodyear RL-5K 20 20 6S 3574 140.7 508 20.0 –64 –2.5 974 2148 565 1246
35/65-33 42PR (L-5) Goodyear NRL D/L 5A 3574 140.7 508 20.0 –64 –2.5 1646 3628 954 2104
875/65R33 (L-5) Goodyear RL-5K Hi Stability 3574 140.7 508 20.0 –64 –2.5 1486 3276 862 1900
35/65R33 (L-5) Michelin XLDD2 3579 140.9 463 18.2 –18 –0.7 648 1428 376 828
35/65R33 (L-5) Michelin XMINED2 3579 140.9 478 18.8 –33 –1.3 1404 3096 815 1796
NOTE: In certain applications (such as load-and-carry work), the loader’s productive capabilities might exceed the tires tonnes-km/f (ton-mph)
capabilities. Caterpillar recommends that you consult a tire supplier to evaluate all conditions before selecting a tire model.
Other special tires are available on request.
Page 25
25
988H Wheel Loader specifications
Standard Equipment
Standard equipment may vary. Consult your Caterpillar dealer for details.
Tilt and lift control system lock
Tinted glass
Transmission gear (indicator)
Wet-arm wiper/washers (front and rear)
Intermittent front wiper
Power Train
Brakes, full hydraulic, enclosed, wet multiple disc
service brakes
Case drain filtration
Demand fan
Electric fuel priming aid
Engine, Cat C18 MEUI Direct Injected Diesel with
ACERT®Technology and ADEM™ IV controller
Guard, three piece transmission
Parking brake
Precleaner, engine air intake
Radiator, Next Generation Modular Radiator (NGMR)
Remote Electronic Clutch Pressure Control (ECPC)
pressure taps
Separated cooling system
Starting aid (ether)/automatic
Throttle lock
Torque converter, impeller clutch with rimpull control system
Transmission, planetary, auto shift with 4F/3R speed
range control
Other Standard Equipment
Automatic bucket tilt/lift kickouts, electronically adjustable
from cab
Cab tilt support
Counterweight
Doors, service access (locking)
Engine, crankcase, 500 hour interval with CH4 oil
Ground level fuel fill
Hitch, drawbar with pin
Hydraulic oil cooler
Lower cab cover
Muffler (under hood)
Oil sampling valves
Stairway, left side rear access
Vandalism protection caplocks
Venturi stack
Tires, Rims and Wheels
An allowance for tires is included in the base machine price.
Tire selections are shown in the Tire/Supplemental
Specifications list.
Antifreeze
Premixed 50 percent concentration of extended life coolant
with freeze protection to –34° C (–29° F)
Electrical
Alarm, back-up
Alternator (100-amp)
Batteries, maintenance-free (four 1,000 CCA)
Deutsch terminal connectors
Diagnostic connector
Starting and charging system
Electrical converter, 12-volt
Electrical system, 24-volt
Lighting system, Halogen
(Front and Rear)
Starter, electric (heavy-duty)
Starter receptacle for emergency start
Operator Environment
Air Conditioner
Cab, sound-suppressed, pressurized
Internal four-post rollover protective structure
(ROPS/FOPS)
Radio ready for (entertainment) includes antenna,
speakers and converter (12-volt 15-amp)
12V cigar lighter, 12V power port and ashtray
Coat hook
Electro-hydraulic tilt and lift controls
Heater and defroster
Horn, electric
Lights, (interior cab)
Lunchbox and beverage holders
Loose Material Mode
Monitoring system (Caterpillar Monitoring System [EMS-III])
Action alert system, three category
Instrumentation, Gauges:
Engine coolant temperature
Fuel level
Hydraulic oil temperature
Transmission temperature
Speedometer/tachometer
Instrumentation, Warning Indicators:
Axle oil temperature (front/rear)
Brake oil pressure
Engine intake/combustion air temperature
Electrical system, low voltage
Engine oil pressure
Engine overspeed
Fuel pressure
Hydraulic oil filter status
Parking brake status
Transmission filter status
Mirrors, rearview (exterior mounted)
Seat (cloth), Cat Comfort, air suspension
Seat belt, retractable, 76 mm (3 in) wide
STIC control system with steering lock
Page 26
26
988H Wheel Loader specifications
Optional Equipment
Optional equipment may vary. Consult your Caterpillar dealer for details.
Lights, HID
Linkage, 4.25 meter
Lock-up clutch
Mid-ambient cooling
No-SPIN differential, rear only
Oil change, high-speed
Payload Control System (PCS)
Product Link
QuickLube
Rear intermittent wiper
Rear chain clearance
Ride control
Right-hand stairway
Roading fenders, front and rear
Roof, extended
Secondary steering
Sound suppression, exterior
Steel mill configuration (Custom)
Tires
Auto Lube
Auxiliary lights
Axle oil-coolers
Block handler configuration (Custom)
Buckets
Bulk loader configuration (Custom)
Computer Aided Earthmoving System (CAES) ready
Directional lights
Engine Brake
Extended Life Coolant –50° C (–58° F)
Forestry configuration (Custom)
Fuel, fast fill
Fuel, heater
Fuel, fast fill and heater
Guards
Crankcase
Steering cylinders
Heater, engine coolant, 120-volt
Heater, engine coolant, 220-volt
High ambient cooling
Hydraulic, three valve
Page 27
988H Wheel Loader specifications
27
Notes
Page 28
For more complete information on Cat products, dealer services,
and industry solutions, visit us on the web at www.cat.com
© 2007 Caterpillar
All Rights Reserved
Printed in U.S.A.
Materials and specifications are subject to change without notice.
Featured machines in photos may include additional equipment.
See your Caterpillar dealer for available options.
CAT, CATERPILLAR, SAFETY.CAT.COM, their respective logos, “Caterpillar Yellow”
and the POWER EDGE trade dress, as well as corporate and product identity used
herein, are trademarks of Caterpillar and may not be used without permission.
AEHQ5618-02 (10-07)
Replaces AEHQ5618-01
988H Wheel Loader
R
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