988K Wheel Loader

988K Wheel Loader

360° Exterior View

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 ...
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Engine

Net Power
541HP
Engine Model
Cat® C18 ACERT™
Bore
5.7in
Stroke
7.2in
Displacement
1105in³
Torque Rise
58%
Rated Speed
1,700 rpm
Net Power - SAE J1349
541HP
Emissions
U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross - ISO 14396
580HP
Peak Power Speed
1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396
580HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995
588HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
541HP
Peak Torque - 1,200 rpm
2104lb/ft

Operating Specifications

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

Buckets

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

Transmission

Transmission Type
Cat planetary power shift
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 - Reverse 2
8.9mile/h
Direct Drive - Reverse 1
5mile/h
Direct Drive - Forward 2
7.8mile/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 3
13.9mile/h
Direct Drive - Forward 4
24.4mile/h
Direct Drive - Reverse 3
15.8mile/h

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
13°

Service Refill Capacities

Fuel Tank
188gal (US)
Cooling System
31.7gal (US)
Crankcase
15.9gal (US)
Transmission
31.7gal (US)
Hydraulic System - Tank Only
63.4gal (US)
Differential - Final Drives - Rear
49.1gal (US)
Differential - Final Drives - Front
49.1gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)
8.7gal (US)
Hydraulic System Factory Fill
125.5gal (US)
Coolant (Validated by Test Cell Fill Quantities)
33gal (US)
Transmission - Validated by Test Cell Fill Quantities
29gal (US)

Hydraulic System - Lift/Tilt

Relief Valve Setting - Lift/Tilt
4757psi
Pilot System
Variable displacement piston
Maximum Flow at 1,400-1,860 rpm
153gal/min
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Cylinders, Double Acting - Tilt, Bore and Stroke
269 mm × 685 mm (8.7 in × 27 in)
Lift/Tilt System
Variable displacement piston
Maximum Flow
13.7gal/min
Relief Valve Setting
551psi
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)

Hydraulic System - Steering

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

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

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

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Machine Sound Level (ISO 6395)
112dB(A)
Operator Sound Level ( ISO 6396)
73dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

Operator Sound Level (ISO 6396)
72dB(A)
Machine Sound Level (ISO 6395)
110dB(A)

Sound Performance - Tier 4 Final/Stage IV - Standard

Machine Sound Level (ISO 6395)
111dB(A)
Operator Sound Level (ISO 6396)
72dB(A)

Sound Performance - Tier 4 Final/Stage IV: Suppression

Machine Sound Level (ISO 6395)
109dB(A)
Operator Sound Level (ISO 6396)
72dB(A)

Brakes

Brakes
SAE J1473 OCT90, ISO 3450:1992

Standard Equipment:

Optional Equipment:

    Power Train
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • 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
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler