New CAT Equipment

988K 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 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.

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Product Specs

Engine

Net Power 541 HP
Engine Model Cat® C18
Bore 5.7 in
Stroke 7.2 in
Displacement 1105 in³
Torque Rise 58 %
Rated Speed 1700/min
Peak Torque - 1,200 rpm 2104 lb/ft
Net Power - SAE J1349 541 HP
Peak Power Speed 1500/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP
Gross - ISO 14396 580 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP
Emissions U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP

Operating Specifications

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

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 - Reverse 2 8.9 mile/h
Direct Drive - Reverse 3 15.8 mile/h
Direct Drive - Forward 2 7.8 mile/h
Direct Drive - Reverse 1 5 mile/h
Direct Drive - Forward 1 Lock-up disabled
Direct Drive - Forward 3 13.9 mile/h
Direct Drive - Forward 4 24.4 mile/h

Hydraulic System - Lift/Tilt

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

Service Refill Capacities

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

Buckets

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

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13 °

Brakes

Brakes SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

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

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

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

Sound Performance - Tier 4 Final/Stage IV - Standard

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

Sound Performance - Tier 4 Final/Stage IV: Suppression

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

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

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

Sound Performance - Tier 2 Equivalent/Stage II: Standard

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