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988 Wheel Loader

Cat® Large Wheel Loaders are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a low cost per ton. Introduced in 1963, the 988 has been an industry leader for 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Net Power - SAE J1349
541 HP
Engine Power - ISO 14396
580 HP
Gross Power - SAE J1995
588 HP
Engine Model
Cat® C18 ™

Engine

Net Power - SAE J1349
541HP
Engine Power - ISO 14396
580HP
Gross Power - SAE J1995
588HP
Engine Model
Cat® C18 ™
Rated Speed
1700/min
Peak Power Speed
1500/rpm
Emissions
U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Bore
5.7in
Stroke
7.2in
Displacement
1105in³
Peak Torque - 1,200 rpm
2230lb/ft
Torque Rise
58%

Operating Specifications

Operating Weight
112574lb
Rated Payload - Quarry Face
12.5t
Rated Payload - Loose Material
16t
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - Standard
770~772
Cat Truck Match - High Lift
773~775

Transmission

Transmission Type
Cat planetary powershift
Forward - 1
4mile/h
Forward - 2
7.2mile/h
Forward - 3
12.7mile/h
Forward - 4
21.6mile/h
Reverse - 1
4.7mile/h
Reverse - 2
8.3mile/h
Reverse - 3
14.4mile/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 2
7.8mile/h
Direct Drive - Forward 3
13.9mile/h
Direct Drive - Forward 4
24.4mile/h
Direct Drive - Reverse 1
5mile/h
Direct Drive - Reverse 2
8.9mile/h
Direct Drive - Reverse 3
15.8mile/h

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Lift/Tilt System
Variable displacement piston
Maximum Flow at 1,400-1,860 rpm
153gal/min
Relief Valve Setting - Lift/Tilt
4757psi
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke
269 mm × 685 mm (8.7 in × 27 in)
Pilot System
Variable displacement piston
Relief Valve Setting - Main
551psi

Hydraulic Cycle Time (1,400-1,860 rpm)

Rack Back
4.5s
Raise
8s
Dump
2.2s
Lower Float Down
3.5s
Total Hydraulic Cycle Time - Empty Bucket
18.2s

Hydraulic System - Steering

Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Maximum Flow
71.3gal/min
Relief Valve Setting - Steering
4351psi
Total Steering Angle
86 °
Steering Cycle Times - High Idle
3.4s
Steering Cycle Times - Low Idle
5.6s

Air Conditioning System

Air Conditioning
The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
13 °

Brakes

Brakes
ISO 3450:2011

Operator's Cab

ROPS/FOPS
ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards

Service Refill Capacities

Fuel Tank
188gal (US)
Cooling System
31.7gal (US)
Coolant (Validated by Test Cell Fill Quantities)
33gal (US)
Crankcase
15.9gal (US)
Diesel Exhaust Fluid Tank
8.7gal (US)
Transmission
31.7gal (US)
Transmission - Validated by Test Cell Fill Quantities
29gal (US)
Differential - Final Drives - Front
49.1gal (US)
Differential - Final Drives - Rear
49.1gal (US)
Hydraulic System Factory Fill
125.5gal (US)
Hydraulic System - Tank Only
63.4gal (US)

Sound Performance - Tier 4 Final/EU Stage V - Standard

Operator Sound Level (ISO 6396)
72dB(A)
Machine Sound Level (ISO 6395)
111dB(A)
Note (1)
The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
Note (2)
Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS
13.8ft
Ground to Top of Exhaust Stacks
14.8ft
Ground to Top of Hood
10.9ft
Rear Axle - Centerline to Bumper
10.5ft
Front Axle Centerline to Bucket Tip
14ft
Wheel Base
14.9ft
Maximum Overall Length
39.3ft
Ground to Lower Hitch Clearance
1.9ft
Clearance at Maximum Lift
11.9ft
B-Pin Height - Maximum Lift
18ft
Maximum Overall Height - Bucket Raised
24.5ft
Reach - Maximum Lift
6.5ft

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS
13.8ft
Ground to Top of Exhaust Stacks
14.8ft
Ground to Top of Hood
10.9ft
Rear Axle - Centerline to Bumper
10.5ft
Front Axle Centerline to Bucket Tip
15.3ft
Wheel Base
14.9ft
Maximum Overall Length
40.7ft
Ground to Lower Hitch Clearance
1.9ft
Clearance at Maximum Lift
13.3ft
B-Pin Height - Maximum Lift
19.3ft
Maximum Overall Height - Bucket Raised
25.8ft
Reach - Maximum Lift
6.8ft

Buckets

Bucket Capacities
4.7-13 m3 (6.2-17 yd3)

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Electrical
    • Alarm, back-up
    • Alternator, single 150 amp
    • Batteries, dry
    • Converter, 10/15 amp, 24V to 12V
    • Lighting system (halogen, work lights, access and service platform lighting)
    • Starting and charging system, 24V
    • Starter emergency start receptacle
    • Starter lockout in bumper
    • Transmission lockout in bumper
  • Operator Environment
    • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
    • Air conditioner
    • Cat Vision, rear vision camera system
    • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
    • Controls, lift and tilt function
    • Heater, defroster
    • Horn, electric
    • Instrumentation, gauges: – Coolant temperature – Engine hour meter – Hydraulic oil temperature – Power train oil temperature
    • Light, cab, dome
    • Lunchbox, beverage holders
    • Mirrors, rearview (externally mounted)
    • Rimpull Control System
    • Seat, deluxe
    • Seat belt minder
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC Control System
    • UV glass
    • Transmission gear indicator
    • Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
    • Wet-Arm wipers/washers (front and rear): – Intermittent front and rear wipers
    • Lights, directional
  • Power Train
    • Brakes, oil-cooled, multi-disc, service/secondary
    • Case drain screens
    • Crankcase guard
    • Electro hydraulic parking brake
    • Engine, C18 MEUI diesel, turbocharged/aftercooled
    • Ground level engine shutoff
    • Turbine precleaner, engine air intake
    • Radiator, Aluminum Modular Radiator (AMR)
    • Starting aid, ether, automatic
    • Throttle lock, electronic
    • Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
    • Transmission, planetary powershift, 4F/3R electronic control
    • Manual switch and automatic fuel priming
    • Cat Production Measurement ready
  • Other
    • Automatic bucket lift kickout/positioner
    • Base machine price includes a rim allowance
    • Hydraulically driven demand fan
    • Couplings, Cat O-ring face seals
    • Doors, service access (locking)
    • Ecology drains for engine, radiator, hydraulic tank
    • Fuel tank, 712 L (188 gal)
    • Hitch, drawbar with pin
    • Hoses, Cat XT
    • Hydraulic, steering and brake filtration/screening system
    • Cat Clean Emission Module
    • Oil sampling valves
    • Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
    • Rear access to cab and service platform
    • Steering, load sensing
    • Toe kicks
    • Vandalism protection caplocks

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • High ambient cooling – software
    • Cat Production Measurement
  • Operator Environment
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
    • Handrail mounted mirrors
  • Miscellaneous Attachments
    • Load and carry counterweight
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries), engine block heater 120V or 240V, heated fuel lines
    • Aggregate Handler

2479mm (98in) Logging Fork

Fork Width
98 in
Width - Over Tines
95 in
Width - Between Tines
95 in

Block Handling Coupler for 988K Wheel Loaders

Width
78.7 in
Height
33.8 in
Weight
3523 lb

5.4m³ (7yd³) Slag Bucket for Wheel Loaders

Width
154 in
Bucket Linkage
Pin-on
Number of Tips
8

6.4m³ (8.3yd³) Slag Bucket for Wheel Loaders

Width
159 in
Bucket Linkage
Pin-on
Weight
18638 lb

4.7m³ (6.2yd³) Iron Ore Bucket for Wheel Loaders

Width
154 in
Bucket Linkage
Pin-on
GET Type
K130

4.4m³ (5.75yd³) Iron Ore Bucket for Wheel Loaders

Width
155 in
Bucket Linkage
Pin-On
GET Type
K130

6.4m³ (8.3yd³) Performance Series Heavy Duty Granite Bucket for Wheel Loaders

Width
157 in
Bucket Linkage
Pin-on
GET Type
K130

6.4m³ (8.33yd³) Heavy Duty Granite Bucket for Wheel Loaders

Width
157 in
Bucket Linkage
Pin-on
GET Type
K130

13m³ (17yd³) Performance Series Coal Buckets for Wheel Loaders

Width
162 in
Bucket Linkage
Pin-on
GET Type
Bolt-on Cutting Edge

11.5m³ (15yd³) Peformance Series Coal Buckets for Wheel Loaders

Width
162 in
Bucket Linkage
Pin-On
Weight
13030 lb

11.5m³ (15yd³) Coal Bucket for Wheel Loaders

Width
162 in
Bucket Linkage
Pin-on
GET Type
Bolt-on Cutting Edge

Specifications

Standard/Optional Features

Attachments