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.
- Technical Specs
- Net Power
- 541.0 hp
- Engine Model
- Cat® C18 ACERT™
- Bore
- 5.7 in
- Stroke
- 7.2 in
- Displacement
- 1105.0 in3
- Torque Rise
- 58.0 %
- Rated Speed
- 1,700 rpm
- Net Power – SAE J1349
- 541.0 hp
- 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)
- 580.0 hp
- Peak Power Speed
- 1,500 rpm
- Peak Power Speed @ 1,500 rpm: Gross – ISO 14396
- 580.0 hp
- Peak Power Speed @ 1,500 rpm: Gross – SAE J1995
- 588.0 hp
- Peak Power Speed @ 1,500 rpm: Net Power – SAE J1349
- 541.0 hp
- Peak Torque @ 1,200 rpm
- 2104.0 lb ft
- Operating Weight
- 112574.0 lb
- Bucket Capacity Range
- 4.7-13 m3 (6.2-17 yd3)
- Rated Payload – High Lift
- 12.5 tons
- Rated Payload – Quarry Face
- 12.5 tons
- Rated Payload – Loose Material
- 16 tons
- Cat Truck Match – Standard
- 770-772
- Cat Truck Match – High Lift
- 773-775
- Transmission Type
- Cat planetary power shift
- Forward 1
- 4.0 mph
- Forward 2
- 7.2 mph
- Forward 3
- 12.7 mph
- Forward 4
- 21.6 mph
- Reverse 1
- 4.7 mph
- Reverse 2
- 8.3 mph
- Reverse 3
- 14.4 mph
- Direct Drive Forward 1
- Lock-up disabled
- Direct Drive Forward 2
- 7.8 mph
- Direct Drive Forward 3
- 13.9 mph
- Direct Drive Forward 4
- 24.4 mph
- Direct Drive Reverse 1
- 5.0 mph
- Direct Drive Reverse 2
- 8.9 mph
- Direct Drive Reverse 3
- 15.8 mph
- 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)
- Lift/Tilt System
- Variable displacement piston
- Maximum Flow
- 13.7 gal/min
- Maximum Flow at 1,400-1,860 rpm
- 153.0 gal/min
- Pilot System
- Variable displacement piston
- Relief Valve Setting
- 551 psi
- Lift/Tilt System – Circuit
- EH- Positive Flow Control, Flow Sharing
- Relief Valve Setting – Lift/Tilt
- 4757 psi
- Fuel Tank
- 188.0 gal
- Cooling System
- 31.7 gal
- Crankcase
- 15.9 gal
- Transmission
- 31.7 gal
- Hydraulic System (tank only)
- 63.4 gal
- Differentials and Final Drives – Front
- 49.1 gal
- Differentials and Final Drives – Rear
- 49.1 gal
- Diesel Exhaust Fluid Tank (for Tier 4 Final/Stage IV only)
- 8.7 gal
- Hydraulic System Factory Fill
- 125.5 gal
- Coolant (validated by test cell fill quantities)
- 33 gal
- Transmission (validated by test cell fill quantities)
- 29 gal
- Bucket Capacities
- 4.7-13 m3 (6.2-17 yd3)
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13°
- Brakes
- SAE J1473 OCT90, ISO 3450:1992
- Steering System – Circuit
- Pilot, load sensing
- Steering System – Pump
- Piston, variable displacement
- Relief Valve Setting – Steering
- 4351.0 psi
- Maximum Flow
- 71.3 gal/min
- Steering Cycle Time (high idle)
- 3.4 sec
- Steering Cycle Time (low idle)
- 5.6 sec
- Total Steering Angle
- 86°
- Dump
- 2.2 Seconds
- Lower Float Down
- 3.5 Seconds
- Rackback
- 4.5 Seconds
- Raise
- 8.0 Seconds
- Total Hydraulic Cycle Time (empty bucket)
- 18.2 Seconds
- Machine Sound Level (ISO 6395)
- 111 dB(A)
- Operator Sound Level (ISO 6396)
- 72 dB(A)
- Machine Sound Level (ISO 6395)
- 109 dB(A)
- Operator Sound Level (ISO 6396)
- 72 dB(A)
- Operator Sound Level (ISO 6396)
- 73 dB(A)
- Machine Sound Level (ISO 6395)
- 112 dB(A)
- Operator Sound Level (ISO 6396)
- 72 dB(A)
- Machine Sound Level (ISO 6395)
- 110 dB(A)