New CAT Equipment

988K Wheel Loader Steel Mill Arrangement

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 lower cost per ton. Introduced in 1963, the 988 has been the industry leader for 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Get a Quote

Learn more about the 988K Wheel Loader Steel Mill Arrangement

Watch

Product Specs

Engine

Net Power 541 HP
Engine Model Cat® C18
Net Power - SAE J1349 541 HP
Bore 5.7 in
Stroke 7.2 in
Displacement 1105 in³
Torque Rise 58 %
Rated Speed 1700/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP
Gross - ISO 14396 580 HP
Peak Power Speed 1500/min
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP
Peak Torque - 1,200 rpm 2104 lb/ft
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP
Emissions Einhaltung von EPA Tier 4 Final (USA)/Stufe IV (EU), Tier-2-konform

Operating Specifications

Operating Weight 112574 lb
Rated Payload 12.5 t
Rated Payload - Standard 12.5 t
Bucket Capacity Range 6.4-7.6 m3 (8.3-10 yd3)
Cat Truck Match - Standard 770-772
Cat Truck Match - High Lift 773-775
Rated Payload - High Lift 12.5 t

Transmission

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

Hydraulic System - Lift/Tilt

Pilot System Variable displacement piston
Relief Valve Setting - Main 551 psi
Maximum Flow 13.7 gal/min
Cylinders, Double Acting - Tilt, Bore and Stroke 267 mm × 685 mm (10.5 in × 27.0 in)
Maximum Flow at 1,400-1,860 rpm 153 gal/min
Cylinders, Double Acting - Lift, Bore and Stroke 210 mm × 1050 mm (8.3 in × 41.3 in)
Lift/Tilt System Variable displacement piston
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt 4757 psi

Service Refill Capacities

Fuel Tank 181 gal (US)
Cooling System 31.7 gal (US)
Crankcase 15.9 gal (US)
Transmission 31.7 gal (US)
Differential - Final Drives - Front 49.1 gal (US)
Differential - Final Drives - Rear 49.1 gal (US)
Hydraulic System - Tank Only 63.4 gal (US)
Diesel Exhaust Fluid Tank (Tier 4) 8.7 gal (US)
Hydraulic System Factory Fill 125.5 gal (US)

Buckets

Bucket Capacities 5.4-6.3 m3 (7.0-8.3 yd3)

Axles

Front Fixed
Rear Trunnion
Oscillation Angle ±6°

Brakes

Brakes SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Relief Valve Setting - Steering 4351 psi
Maximum Flow 71.3 gal/min
Steering Cycle Times - Low Idle 5.6 s
Total Steering Angle 80 °
Steering Cycle Times - High Idle 3.4 s

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

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

Sound Performance - Standard

Operator Sound Level (ISO 6396) 71 dB(A)
Machine Sound Level (ISO 6395) 111 dB(A)

Sound Performance - Suppression

Operator Sound Level (ISO 6396) 70 dB(A)
Machine Sound Level (ISO 6395) 109 dB(A)