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Caterpillar Product Information

Salesgram

For Dealer Sales Personnel

988F 988F Series II

Load & Carry Load & Carry

Power kW (hp) 310 (415) 321 (430)

Bucket Capacity m3 (yd3) 6.0 (7.8) 6.15 (8.0)

Operating Weight kg (lb) 44 037 (97,084) 45 297 (99,857)

Breakout Force kg (lb) 37 533 (82,745) 37 399 (82,446)

Full Turn STL kg (lb) 25 963 (57,238) 27 603 (60,851)

Dump Clearance mm (ft-in) 3481 (11-5) 3209 (10-6)

Reach mm (ft-in) 1635 (5-4) 1832 (6-0)

Clearance Circle m (ft-in) 17.4 (56-11) 17.4 (56-11)

Wheelbase mm (ft-in) 3810 (12-6) 3810 (12-6)

Height to top of ROPS mm (ft-in) 4157 (13-7) 4157 (13-7)

* All measurement with spade edge bucket, no teeth, and standard tires.

September 1996

Cat988F Series IILoad & CarryArrangement

Basic SpecificationsComparison

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988F Series II Load andCarry Arrangement

Large Wheel Loader Custom Products now offers two 988F

Series II Load and Carry arrangements with many new features to

enhance operator comfort and increase total productivity. Both of

the Load and Carry arrangements meet specific customer needs.

1. STIC Control Arrangement: Recommended for short haul,part-time load and carry applications.

430 Flywheel Horsepower (321 kW)

- Up from 415 hp (310 kW)

STIC Control System (Steering and Transmission

Integrated Controls)

- Replaces the steering wheel

- Uses a single controller for both steering and

transmission control

- Reduces operator fatigue

Lock-up Clutch Torque Converter

- On/off switch on the dash, for conventional torqueconverter or lock-up clutch

- At travel speeds (1,500 rpm or more), it allows

the machine to run in direct drive for greater fuel

efficiency

- Direct drive (lock-up) allows 15 percent more

run-out speed in 4th gear (up to 25 mph)

Ride Control

- Improves operator ride and comfort

- Reduces bucket spillage

- Allows for high speed load and carry

- Improves cycle times- Improves machine balance and ride when using large

buckets at high speed.

Smaller Hydraulic Pump

- Improves rimpull on ramps and grades while lifting

the bucket

2. Auto-shift Arrangement: Recommended for long haul

(350-650 ft.), full time load and carry applications.

Same as the STIC Control arrangements except for

steering wheel and Auto-shift.

Auto-shift Transmission

- Switch for Auto-shift/Lock-up or Conventional TorqueConverter Mode.

- Auto-shift 2nd-4th gears, when Auto-shift/Lock-up

engaged.

- Quick gear kickdown button, allows operator to downshift

quickly and shift from 2nd to 1st when loading

- Automatic up-shift (1st forward to 2nd reverse) when

shifting into reverse when in Auto-shift mode

- Twist shift handle for upper gear selection and manual

shifting

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ImprovementsBoth arrangements are recommended for load and carry applications.They are not recommended for full time truck loading.

The 988F Series II Load and Carry arrangement includes all of the

improvements introduced on the standard 988F Series II wheel

loader. The following list is a brief summary of the highlights.Refer to salesgram number TEKQ4022 for details on the

improvements between the 988F and 988F Series II wheel loaders.

Performance and Operation

Cat 3408E direct injection, turbocharged and aftercooled

diesel engine with HEUI (Hydraulic actuated, Electronically

controlled, Unit Injected) fuel system increases flywheel power

to 430 hp (321 kW).

The HEUI fuel system is controlled by an ADEM (Advanced

Diesel Engine Management) ECM (Electronic Control Module)

for more precise fuel injection timing, pressure and duration at

every speed and load point. The result is improved fuel economy,

faster response and lower emissions.

The ECM provides electronic speed governing and is adjustment

free. The ECM shares data through the Cat Data Link to provide

data to the monitoring system, to integrate with the transmission

control for optimal machine performance, and to provide an

interface for troubleshooting by technicians.

The 3408E features several durability improvements including

aluminum alloy pistons, larger capacity engine oil pump,improved coolant passages in the block and heads, chrome

plated intake and exhaust valves, and new turbochargers with

improved bearings.

The multi-row modular radiator with remote mounted hydraulic

fan provide high-capacity cooling and lower operator/spectator

sound levels.

Bucket ranges from 7.8 to 9.0 cubic yards

(6.0 to 6.9 cubic meters).

Full turn static tipping load increased by 8 percent over 988F.

Lock-up torque converter increasing rimpull in upper speedranges for faster cycle times, fuel efficiency and improved

gradeability when loaded. This clutch automatically engages

when the machine reaches a given speed in each gear. When

a shift occurs, the lock-up clutch disengages until the machine

reaches the set speed in the next gear, then re-engages.

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Serviceability

Upper engine enclosure doors, hinged lower engine access

doors, hinged radiator clean out doors, and a hinged radiator

grill all combine to provide easy access to major components.

Axle shaft brakes, similar to those on the 990 wheel loader,replace the oil disc brakes found on the 988F. The new axle shaft

brakes are fully hydraulic, seal from contaminants and never

need adjustment. Cooling oil contained in the axle housing is

carried by grooves in the face of the disc to provide cooling

even when the brake is applied.

On conventional brake designs, it is necessary to break the final

drive to service the brakes. With the axle shaft brake, the final

drive and hub are removed intact. This exposed the brake discs,

allowing easy replacement. When the discs are in, simply

replace the hub and final drive assembly.

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Operator's Station

The 988F Series II improves the operators station by reducing

the sound level, increasing the viewing area and improving the

interior environment. Viewing area is increased by adding more

glass area to the lower part of the cab. The interior cab environmentis modernized with a gray interior color scheme. Other operator

oriented enhancements include:

Ether Aid Automatic actuation controlled by operators

choice of ADEM or Manual Actuation.

Throttle Lock Presets the engine speed to enhance

operator control of the machine for high

production. The rocker switch located right

below the CMS panel turns the system on

and off. The two buttons right in front of

the right arm rest sets and resumes theengine speed. The first button is to set

and reduce the rpm. The throttle lock can

be shut off by pressing the brake pedal.

Previous engine speed may be resumed

by the resume button and this button also

adjusts speed upward in 50 rpm increments.

Axle Temp Sensor Detects and advises the operator of

excessive axle oil temperature.

CMS Software changes to improve diagnostic

capability. Electrical System MPC (Multi Process Controller) 10

is retained but the software changes

were made for improved flexibility

of the machine.

- Wiring harnesses changes to improve

the reliability and durability

- New & additional circuits

- ISO Standard wiring

Steering System Steering hydraulic system redesigned

to improve efficiency and reduce powerrequirement, improving fuel efficiency.

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TEKQ4023September 1996

1996 CaterpillarPrinted in U.S.A.

The information contained herein is intended for circulation only to Caterpillar and dealer employees whose duties require knowledge of such reports and isintended exclusively for their information and training. It may contain unverified analysis and facts observed by various Caterpillar or dealer employees. However,

effort has been made to provide reliable results regarding any information comparing Caterpillar built and competitive machines. Effort has been made to use the

latest avai lable spec sheet and other mat erial in the f ul l understanding that these are subject t o change w ithout notice.Any reproduction of this release without the foregoing explanation is prohibi ted.

Computerized Monitoring System(CMS)

Three warning system and four diagnostic modes for easy system

troubleshooting and minimum downtime. Vacuum fluorescent

display provides easy reading in direct sunlight or at night.

Payload Monitor

An improved PCS II (Payload Control System) replaces the

previous PMS (Payload Measuring System). This system gives the

operator the ability to measure payload on-the-go with an accuracy

of 2%. PCS II compared to PMS has improved reliability,

durability, and functionality including download capability.

Optional Equipment