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Ziegler CAT

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.

Brand: Caterpillar

Photos

Videos

  • Meet the Pros: Randy Aneloski, Cat® Large Wheel Loaders
  • Large Wheel Loader Operator Training

360° View

Exterior

360° Exterior view. Double click on the image to zoom in on any area of the product.

Interior

360° interior view. Double click on the image to zoom in on any area of the product.

Specifications

  • Engine
    SpecValue
    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 1,700 rpm
    Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP
    Gross - ISO 14396 580 HP
    Peak Power Speed 1,500 rpm
    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 U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
  • Operating Specifications
    SpecValue
    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
    SpecValue
    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
    SpecValue
    Pilot System Variable displacement piston
    Relief Valve Setting 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
    SpecValue
    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
    SpecValue
    Bucket Capacities 5.4-6.3 m3 (7.0-8.3 yd3)
  • Axles
    SpecValue
    Front Fixed
    Rear Trunnion
    Oscillation Angle ±6°
  • Brakes
    SpecValue
    Brakes SAE J1473 OCT90, ISO 3450:1992
  • Hydraulic System - Steering
    SpecValue
    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)
    SpecValue
    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
    SpecValue
    Operator Sound Level (ISO 6396) 71 dB(A)
    Machine Sound Level (ISO 6395) 111 dB(A)
  • Sound Performance - Suppression
    SpecValue
    Operator Sound Level (ISO 6396) 70 dB(A)
    Machine Sound Level (ISO 6395) 109 dB(A)