New | 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.

Net Power541 HP
Engine ModelCat® C18 ACERT™
Net Power - SAE J1349541 HP
Bore5.7 in
Stroke7.2 in
Displacement1105 in³
Torque Rise58 %
Rated Speed1,700 rpm
EmissionsU.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Gross - ISO 14396580 HP
Peak Power Speed1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396580 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995588 HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349541 HP
Peak Torque - 1,200 rpm2104 lb/ft
Operating Specifications
Operating Weight112574 lb
Rated Payload12.5 t
Rated Payload - Standard12.5 t
Bucket Capacity Range6.4-7.6 m3 (8.3-10 yd3)
Cat Truck Match - Standard770-772
Cat Truck Match - High Lift773-775
Rated Payload - High Lift12.5 t
Transmission TypeCat planetary power shift
Forward - 14 mile/h
Forward - 27.2 mile/h
Forward - 312.7 mile/h
Forward - 421.6 mile/h
Reverse - 14.7 mile/h
Reverse - 28.3 mile/h
Reverse - 314.4 mile/h
Direct Drive - Forward 1Lock-up disabled
Direct Drive - Forward 27.8 mile/h
Direct Drive - Forward 313.9 mile/h
Direct Drive - Forward 424.4 mile/h
Direct Drive - Reverse 15 mile/h
Direct Drive - Reverse 28.9 mile/h
Direct Drive - Reverse 315.8 mile/h
Hydraulic System - Lift/Tilt
Cylinders, Double Acting - Lift, Bore and Stroke210 mm × 1050 mm (8.3 in × 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke267 mm × 685 mm (10.5 in × 27.0 in)
Lift/Tilt SystemVariable displacement piston
Maximum Flow13.7 gal/min
Maximum Flow at 1,400-1,860 rpm153 gal/min
Pilot SystemVariable displacement piston
Relief Valve Setting551 psi
Lift/Tilt System - CircuitEH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt4757 psi
Service Refill Capacities
Fuel Tank181 gal (US)
Cooling System31.7 gal (US)
Crankcase15.9 gal (US)
Transmission31.7 gal (US)
Differential - Final Drives - Front49.1 gal (US)
Differential - Final Drives - Rear49.1 gal (US)
Hydraulic System - Tank Only63.4 gal (US)
Diesel Exhaust Fluid Tank (Tier 4)8.7 gal (US)
Hydraulic System Factory Fill125.5 gal (US)
Bucket Capacities5.4-6.3 m3 (7.0-8.3 yd3)
Oscillation Angle±6°
BrakesSAE J1473 OCT90, ISO 3450:1992
Hydraulic System - Steering
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Relief Valve Setting - Steering4351 psi
Maximum Flow71.3 gal/min
Steering Cycle Times - High Idle3.4 s
Steering Cycle Times - Low Idle5.6 s
Total Steering Angle80 °
Hydraulic Cycle Time (1,400-1,860 rpm)
Dump2.2 s
Lower Float Down3.5 s
Rack Back4.5 s
Raise8 s
Total Hydraulic Cycle Time - Empty Bucket18.2 s
Sound Performance - Standard
Machine Sound Level (ISO 6395)111 dB(A)
Operator Sound Level (ISO 6396)71 dB(A)
Sound Performance - Suppression
Machine Sound Level (ISO 6395)109 dB(A)
Operator Sound Level (ISO 6396)70 dB(A)
  • Efficiency
  • Structures
  • Power Train
  • Hydraulics
  • Operator Station
  • Technology Solutions
  • Serviceability
  • Customer Support
  • Safety
  • Steel Mill Features
  • Buckets And Ground Engaging Tools
  • Operating Costs

Standard Equipment

  • Alarm, back-up
  • Alternator, single 150 amp
  • Batteries, dry
  • Converter, 10/15 amp, 24V to 12V
  • Lighting system (halogen, work lights, access and service platform lighting)
  • Starting and charging system, 24V
  • Starter emergency start receptacle
  • Starter lockout
  • Transmission lockout
  • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
  • Air conditioner
  • Cat Detect Vision, rear vision camera system
  • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
  • Controls, lift and tilt function
  • Heater, defroster
  • Horn, electric
  • Instrumentation, gauges: - Coolant temperature - Engine hour meter - Hydraulic oil temperature - Power train oil temperature
  • Light, cab, dome
  • Lunchbox, beverage holders
  • Mirrors, rearview (externally mounted)
  • Rimpull Control System
  • Seat, Cat Comfort (cloth), air suspension, six-way adjustable
  • Seat belt, retractable, 76 mm (3 in) wide
  • STIC Control System
  • UV glass
  • Transmission gear indicator
  • Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
  • Wet-Arm wipers/washers (front and rear): - Intermittent front and rear wipers
  • Lights, directional
  • Brakes, oil-cooled, multi-disc, service/secondary
  • Case drain screens
  • Crankcase guard
  • Electro hydraulic parking brake
  • Engine, C18 MEUI diesel, turbocharged/aftercooled
  • Ground level engine shutoff
  • Turbine precleaner, engine air intake
  • Radiator, Next Generation Modular (NGMR)
  • Starting aid, ether, automatic
  • Throttle lock, electronic
  • Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
  • Transmission, planetary powershift, 4F/3R electronic control
  • Automatic bucket lift kickout/positioner
  • Base machine price includes a rim allowance
  • Hydraulically driven demand fan
  • Couplings, Cat O-ring face seals
  • Doors, service access (locking)
  • Ecology drains for engine, radiator, hydraulic tank
  • Fuel tank, 731 L (188 gal)
  • Hitch, drawbar with pin
  • Hoses, Cat XT
  • Hydraulic, steering and brake filtration/screening system
  • Cat Clean Emission Module
  • Oil sampling valves
  • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
  • Rear access to cab and service platform
  • Steering, load sensing
  • Toe kicks
  • Vandalism protection caplocks

Optional Equipment

  • 50° C (-58° F) antifreeze
  • Engine oil change system, high speed, Wiggins
  • Engine block heater 120V or 240V
  • High ambient cooling - software
  • Payload Control System (PCS)
  • Cab precleaner
  • AM/FM/CD/MP3 radio
  • Satellite Sirius radio with bluetooth
  • LED warning strobe
  • CB radio ready
  • Window pull down visor
  • Front and rear roading fenders






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