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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.

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SPECIFICATION SUMMARY
  • Net Power 541.0 hp
  • Operating Weight 112574.0 lb
  • Bucket Capacities 4.7-13 m3 (6.2-17 yd3)
  • Engine Model Cat® C18 ACERT™

PRICE (USD)
Call 800-637-5000 for rate information

Engine

  • 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 OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
  • Gross - ISO 14396
    580 HP
  • Peak Power Speed
    1500/min
  • 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
  • Net Power
    541 HP
  • Engine Model
    Cat® C18 ™
  • Bore
    5.7 in
  • Stroke
    7.2 in
  • Displacement
    1105 in³
  • Torque Rise
    58 %
  • Rated Speed
    1700/min
  • Emissions
    U.S. EPA Tier 4 Final/EU Stage IV OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
  • Net Power - SAE J1349
    541 HP

Operating Specifications

  • Operating Weight
    112574.0 lb
  • Rated Payload – Quarry Face
    12.5 tons
  • Rated Payload – Loose Material
    16 tons
  • Bucket Capacity Range
    4.7-13 m3 (6.2-17 yd3)
  • Cat Truck Match - Standard
    770～772
  • Cat Truck Match - High Lift
    773～775
  • Operating Weight
    112574 lb
  • Rated Payload - Loose Material
    16 t
  • Rated Payload - Quarry Face
    12.5 t

Buckets

  • Bucket Capacities
    4.7-13 m3 (6.2-17 yd3)
  • Bucket Capacities
    4.7-13 m3 (6.2-17 yd3)

Transmission

  • 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 2
    7.8 mph
  • Direct Drive Reverse 1
    5.0 mph
  • Direct Drive Reverse 2
    8.9 mph
  • Direct Drive - Forward 1
    Lock-up disabled
  • Direct Drive - Forward 3
    13.9 mile/h
  • Direct Drive - Forward 4
    24.4 mile/h
  • Direct Drive - Reverse 3
    15.8 mile/h
  • Transmission Type
    Cat-Planetenlastschaltgetriebe
  • 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 2
    7.8 mile/h
  • Direct Drive - Reverse 1
    5 mile/h
  • Direct Drive - Reverse 2
    8.9 mile/h

Axles

  • Front
    Fixed
  • Rear
    Trunnion
  • Oscillation Angle
    13°
  • Front
    Fixed
  • Rear
    Trunnion
  • Oscillation Angle
    13 °

Hydraulic System – Steering

  • Steering System – Circuit
    Pilot, load sensing
  • Steering System – Pump
    Piston, variable displacement
  • 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°

Service Refill Capacities

  • Fuel Tank
    188.0 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 (for Tier 4 Final/Stage IV only)
    8.7 gal
  • Hydraulic System Factory Fill
    125.5 gal (US)
  • Coolant (Validated by Test Cell Fill Quantities)
    33 gal (US)
  • Transmission - Validated by Test Cell Fill Quantities
    29 gal (US)
  • 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)

Sound Performance – Tier 4 Final/Stage IV: Standard

  • Operator Sound Level (ISO 6396)
    72 dB(A)
  • Machine Sound Level (ISO 6395)
    111 dB(A)

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)
  • Maximum Flow at 1,400-1,860 rpm
    153.0 gal/min
  • Pilot System
    Variable displacement piston
  • Relief Valve Setting – Lift/Tilt
    4757 psi

Sound Performance – Tier 4 Final/Stage IV: Suppression

  • Operator Sound Level (ISO 6396)
    72 dB(A)
  • Machine Sound Level (ISO 6395)
    109 dB(A)

Brakes

  • Brakes
    SAE J1473 OCT90, ISO 3450:1992
  • Brakes
    SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

  • Relief Valve Setting - Steering
    4351 psi
  • Maximum Flow
    71.3 gal/min
  • 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 System - Lift/Tilt

  • Lift/Tilt System
    Variable displacement piston
  • Maximum Flow
    13.7 gal/min
  • Relief Valve Setting - Main
    551 psi
  • 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 - Circuit
    EH- Positive Flow Control, Flow Sharing
  • Maximum Flow at 1,400-1,860 rpm
    153 gal/min
  • Pilot System
    Variable displacement piston
  • Relief Valve Setting - Lift/Tilt
    4757 psi

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 2 Equivalent/Stage II: Standard

  • Operator Sound Level (ISO 6396)
    73 dB(A)

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

  • Operator Sound Level (ISO 6396)
    72 dB(A)
  • Machine Sound Level (ISO 6395)
    110 dB(A)

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)

POWERFUL EFFICIENCY

LONG TERM VALUE AND DURABILITY

PROVEN RELIABILITY

PERFORMANCE AND PRODUCTIVITY

OPERATOR COMFORT AND CONTROL

PRODUCTIVITY WITH TECHNOLOGY

SAVE ON SERVICE AND MAINTENANCE

TOP-TIER SERVICE AND SUPPORT

SAFETY FIRST

REDUCE ENVIRONMENTAL IMPACT

EFFICIENT EQUIPMENT MATCH

ATTACHMENTS TO MEET YOUR NEEDS

PERFORMANCE WITH LESS FUEL

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Electrical
    • 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 in bumper
    • Transmission lockout in bumper
  • Operator Environment
    • 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 minder
    • 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
  • Power Train
    • 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, Aluminum Modular Radiator (AMR)
    • 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
    • Manual switch and automatic fuel priming
    • Cat Production Measurement ready
  • Other
    • 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:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • –50° C (–58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling – software
    • Cat Production Measurement
  • Operator Environment
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
    • Handrail mounted mirrors
  • Miscellaneous Attachments
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler
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