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Large Wheel Loaders

988K Wheel Loader

Net Power

541 HP

Operating Weight

112,574 lb

Bucket Capacities

4.7-13 m3 (6.2-17 yd3)

SPECIFICATIONS

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.

    Axles

    Front

    Fixed

    Rear

    Trunnion

    Oscillation Angle

    13 °

    Brakes

    Brakes

    SAE J1473 OKT90, ISO 3450:1992

    Buckets

    Bucket Capacities

    4.7-13 m3 (6.2-17 yd3)

    Engine

    Net Power

    541 HP

    Engine Model

    Cat® C18 ™

    Bore

    5.7 in

    Stroke

    7.2 in

    Displacement

    1,105 in³

    Torque Rise

    58 %

    Rated Speed

    1700/min

    Net Power - SAE J1349

    541 HP

    Peak Power Speed - 1,500 rpm - Gross - ISO 14396

    580 HP

    Peak Power Speed - 1,500 rpm - Net Power - SAE J1349

    541 HP

    Peak Power Speed - 1,500 rpm - Gross - SAE J1995

    588 HP

    Peak Power Speed

    1500/min

    Emissions

    U.S. EPA Tier 4 Final/EU Stage V OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent

    Gross - ISO 14396

    580 HP

    Peak Torque - 1,200 rpm

    2,104 lb/ft

    Hydraulic Cycle Time (1,400-1,860 rpm)

    Dump

    2.2 s

    Total Hydraulic Cycle Time - Empty Bucket

    18.2 s

    Lower Float Down

    3.5 s

    Rack Back

    4.5 s

    Raise

    s

    Hydraulic System - Lift/Tilt

    Cylinders, Double Acting - Tilt, Bore and Stroke

    269 mm × 685 mm (8.7 in × 27 in)

    Lift/Tilt System

    Variable displacement piston

    Cylinders, Double Acting - Lift, Bore and Stroke

    210 mm × 1050 mm (8.7 in × 41.3 in)

    Relief Valve Setting - Lift/Tilt

    4,757 psi

    Pilot 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

    Relief Valve Setting - Main

    551 psi

    Hydraulic System - Steering

    Steering System - Pump

    Piston, variable displacement

    Steering Cycle Times - Low Idle

    5.6 s

    Steering Cycle Times - High Idle

    3.4 s

    Steering System - Circuit

    Pilot, load sensing

    Relief Valve Setting - Steering

    4,351 psi

    Maximum Flow

    71.3 gal/min

    Total Steering Angle

    86 °

    Operating Specifications

    Operating Weight

    112,574 lb

    Bucket Capacity Range

    4.7-13 m3 (6.2-17 yd3)

    Cat Truck Match - Standard

    770~772

    Rated Payload - Quarry Face

    12.5 t

    Rated Payload - Loose Material

    16 t

    Cat Truck Match - High Lift

    773~775

    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)

    Hydraulic System Factory Fill

    125.5 gal (US)

    Differential - Final Drives - Front

    49.1 gal (US)

    Differential - Final Drives - Rear

    49.1 gal (US)

    Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)

    8.7 gal (US)

    Transmission - Validated by Test Cell Fill Quantities

    29 gal (US)

    Coolant (Validated by Test Cell Fill Quantities)

    33 gal (US)

    Sound Performance - Tier 2 Equivalent/Stage II: Standard

    Operator Sound Level ( ISO 6396)

    73 dB(A)

    Machine Sound Level (ISO 6395)

    112 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)

    Sound Performance - Tier 4 Final/Stage IV - Standard

    Operator Sound Level (ISO 6396)

    72 dB(A)

    Machine Sound Level (ISO 6395)

    111 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)

    Transmission

    Transmission Type

    Cat-Planetenlastschaltgetriebe

    Forward - 1

    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 - Reverse 1

    mile/h

    Direct Drive - Reverse 3

    15.8 mile/h

    Direct Drive - Forward 2

    7.8 mile/h

    Direct Drive - Reverse 2

    8.9 mile/h

    Direct Drive - Forward 1

    Lock-up disabled

    Direct Drive - Forward 3

    13.9 mile/h

    Direct Drive - Forward 4

    24.4 mile/h

    • 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

    • 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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