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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.
- Technical Specs
- Net Power
- 541.0 hp
- Engine Model
- Cat® C18 ACERT™
- Net Power - SAE J1349
- 541.0 hp
- Bore
- 5.7 in
- Stroke
- 7.2 in
- Displacement
- 1105.0 in3
- Torque Rise
- 58.0 %
- Rated Speed
- 1,700 rpm
- Emissions
- U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 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
- Rated Payload
- 12.5 tons
- Rated Payload - Standard
- 12.5 tons
- 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 tons
- 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 (8.3 in × 41.3 in)
- Cylinders, Double Acting: Tilt, Bore and Stroke
- 267 mm × 685 mm (10.5 in × 27.0 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
- 551.0 psi
- Lift/Tilt System - Circuit
- EH- Positive Flow Control, Flow Sharing
- Relief Valve Setting - Lift/Tilt
- 4757.0 psi
- Fuel Tank
- 181.0 gal
- Cooling System
- 31.7 gal
- Crankcase
- 15.9 gal
- Transmission
- 31.7 gal
- Differentials and Final Drives - Front
- 49.1 gal
- Differentials and Final Drives - Rear
- 49.1 gal
- Hydraulic System (tank only)
- 63.4 gal
- Diesel Exhaust Fluid Tank (Tier 4)
- 8.7 gal
- Hydraulic System Factory Fill
- 125.5 gal
- Bucket Capacities
- 5.4-6.3 m3 (7.0-8.3 yd3)
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- ±6°
- 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 Seconds
- Steering Cycle Time (low idle)
- 5.6 Seconds
- Total Steering Angle
- 80.0 Degrees
- 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)
- 111.0 dB(A)
- Operator Sound Level (ISO 6396)
- 71.0 dB(A)
- Machine Sound Level (ISO 6395)
- 109.0 dB(A)
- Operator Sound Level (ISO 6396)
- 70.0 dB(A)