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988K Wheel Loader

  • OVERVIEW
  • SPECIFICATIONS
  • STANDARD / OPTIONAL
PRODUCT DESCRIPTION

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.

Engine
  • Net Power - 541 HP
  • Engine Model - Cat® C18 ACERT™
  • Bore - 5.7 in
  • Stroke - 7.2 in
  • Displacement - 1105 in³
  • Torque Rise - 58 %
  • Rated Speed - 1,700 rpm
  • 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 HP
  • Net Power - SAE J1349 - 541 HP
  • Peak Power Speed - 1,500 rpm
  • Peak Power Speed - 1,500 rpm - Gross - ISO 14396 - 580 HP
  • Peak Power Speed - 1,500 rpm - Gross - SAE J1995 - 588 HP
  • Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 - 541 HP
  • Peak Torque - 1,200 rpm - 2104 lb/ft
  • Operating Specifications
  • Operating Weight - 112574 lb
  • Bucket Capacity Range - 4.7-13 m3 (6.2-17 yd3)
  • Cat Truck Match - High Lift - 773-775
  • Cat Truck Match - Standard - 770-772
  • Rated Payload - Loose Material - 16 t
  • Rated Payload - Quarry Face - 12.5 t
  • Transmission
  • Transmission Type - Cat planetary power shift
  • 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
  • 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
  • Lift/Tilt System - Circuit - EH- Positive Flow Control, Flow Sharing
  • Maximum Flow - 13.7 gal/min
  • Maximum Flow at 1,400-1,860 rpm - 153 gal/min
  • Pilot System - Variable displacement piston
  • Relief Valve Setting - 551 psi
  • Relief Valve Setting - Lift/Tilt - 4757 psi
  • 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)
  • Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only) - 8.7 gal (US)
  • Differential - Final Drives - Front - 49.1 gal (US)
  • Differential - Final Drives - Rear - 49.1 gal (US)
  • Hydraulic System Factory Fill - 125.5 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 OCT90, ISO 3450:1992
  • Hydraulic System - Steering
  • Maximum Flow - 71.3 gal/min
  • Relief Valve Setting - Steering - 4351 psi
  • Steering Cycle Times - High Idle - 3.4 s
  • Steering Cycle Times - Low Idle - 5.6 s
  • 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 - 2.2 s
  • Lower Float Down - 3.5 s
  • Rack Back - 4.5 s
  • Raise - 8 s
  • Total Hydraulic Cycle Time - Empty Bucket - 18.2 s
  • Sound Performance - Tier 4 Final/Stage IV - Standard
  • Machine Sound Level (ISO 6395) - 111 dB(A)
  • Operator Sound Level (ISO 6396) - 72 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)
  • Service Refill Capacities
  • Coolant (Validated by Test Cell Fill Quantities) - 33 gal (US)
  • Transmission - Validated by Test Cell Fill Quantities - 29 gal (US)
  • Sound Performance - Tier 2 Equivalent/Stage II: Standard
  • Machine Sound Level (ISO 6395) - 112 dB(A)
  • Operator Sound Level ( ISO 6396) - 73 dB(A)
  • Sound Performance - Tier 2 Equivalent/Stage II: Suppression
  • Machine Sound Level (ISO 6395) - 110 dB(A)
  • Operator Sound Level (ISO 6396) - 72 dB(A)
  • Standard Equipment
  • ELECTRICAL
  • OPERATOR ENVIRONMENT
  • POWER TRAIN
  • OTHER
  • Optional Equipment
  • POWER TRAIN
  • OPERATOR ENVIRONMENT
  • MISCELLANEOUS ATTACHMENTS
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