Cat Wheel Loaders:

988K Millyard Arrangement

Net Power
541.0 hp
Operating Weight
139920.0 lb
Engine Model
Cat® C18 ACERT™
Net Power - SAE J1349
541.0 hp

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. The 988K Millyard Arrangement is designed to meet the demands of millyard applications. The features of the 988K Millyard work together to provide a durable and reliable machine to meet the needs of the modern millyard.



Product Specs

  • Engine

  • Net Power
    541.0hp
    Engine Model
    Cat® C18 ACERT™
    Net Power - SAE J1349
    541.0hp
    Bore
    5.7in
    Stroke
    7.2in
    Displacement
    1105.0in3
    Torque Rise
    58.0%
    Rated Speed
    1,700 rpm
    Emissions
    U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent
    Net Power
    541HP
    Engine Model
    Cat® C18 ACERT™
    Net Power - SAE J1349
    541HP
    Bore
    5.7in
    Stroke
    7.2in
    Displacement
    1105in³
    Torque Rise
    58%
    Rated Speed
    1,700 rpm
    Emissions
    U.S. EPA Tier 4 Final/EU Stage IV Technology or Tier 2 Equivalent
    Gross - ISO 14396
    580HP
    Peak Power Speed
    1,500 rpm
    Peak Power Speed - 1,500 rpm - Gross - ISO 14396
    580HP
    Peak Power Speed - 1,500 rpm - Gross - SAE J1995
    588HP
    Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
    541HP
    Peak Torque - 1,200 rpm
    2104lb/ft
  • Operating Specifications

  • Operating Weight
    139920.0lb
    Tipping Load - Articulated 37°
    68005.0lb
    Tipping Load - Straight
    78115.0lb
    Operating Weight
    139920lb
    Tipping Load - Articulated 37°
    68005lb
    Tipping Load - Straight
    78115lb
  • Transmission

  • Transmission Type
    Cat planetary power shift
    Forward 1
    4.0mph
    Forward 2
    7.2mph
    Forward 3
    12.7mph
    Forward 4
    21.6mph
    Reverse 1
    4.7mph
    Reverse 2
    8.3mph
    Reverse 3
    14.4mph
    Direct Drive - Forward 2
    7.8mph
    Direct Drive - Reverse 1
    5.0mph
    Direct Drive - Reverse 2
    8.9mph
    Transmission Type
    Cat planetary power shift
    Forward - 1
    4mile/h
    Forward - 2
    7.2mile/h
    Forward - 3
    12.7mile/h
    Forward - 4
    21.6mile/h
    Reverse - 1
    4.7mile/h
    Reverse - 2
    8.3mile/h
    Reverse - 3
    14.4mile/h
    Direct Drive - Forward 2
    7.8mile/h
    Direct Drive - Reverse 1
    5mile/h
    Direct Drive - Reverse 2
    8.9mile/h
    Direct Drive - Forward 1
    Lock-up disabled
    Direct Drive - Forward 3
    13.9mile/h
    Direct Drive - Forward 4
    24.4mile/h
    Direct Drive - Reverse 3
    15.8mile/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
    Steering Cycle Time (low idle)
    5.6Seconds
    Total Steering Angle
    74.0Degrees
    Maximum Flow
    71.3gal/min
    Steering Cycle Time (high idle)
    3.4Seconds
    Steering System - Circuit
    Pilot, load sensing
    Steering System - Pump
    Piston, variable displacement
    Maximum Flow
    71.3gal/min
    Steering Cycle Times - High Idle
    3.4s
    Steering Cycle Times - Low Idle
    5.6s
    Total Steering Angle
    74°
    Relief Valve Setting - Steering
    4351psi
  • Service Refill Capacities

  • Fuel Tank
    188.0gal
    Cooling System
    31.7gal
    Crankcase
    15.9gal
    Transmission
    31.7gal
    Differentials and Final Drives - Front
    49.1gal
    Differentials and Final Drives - Rear
    49.1gal
    Hydraulic System (tank only)
    63.4gal
    Diesel Exhaust Fluid Tank
    8.7gal
    Hydraulic System Factory Fill
    125.5gal (US)
    Fuel Tank
    188gal (US)
    Cooling System
    31.7gal (US)
    Crankcase
    15.9gal (US)
    Transmission
    31.7gal (US)
    Differential - Final Drives - Front
    49.1gal (US)
    Differential - Final Drives - Rear
    49.1gal (US)
    Hydraulic System - Tank Only
    63.4gal (US)
    Diesel Exhaust Fluid Tank
    8.7gal (US)
  • Forks

  • Fork End Area
    69.0ft2
    Fork End Area
    69ft²
  • Sound Performance - Standard

  • Machine Sound Level (ISO 6395)
    111.0dB(A)
    Operator Sound Level (ISO 6396)
    71.0dB(A)
    Machine Sound Level (ISO 6395)
    111dB(A)
    Operator Sound Level (ISO 6396)
    71dB(A)
  • Hydraulic System - Lift/Tilt

  • Cylinders, Double Acting: Lift, Bore and Stroke
    235 mm × 976 mm (9.25 in × 38.4 in)
    Cylinders, Double Acting: Tilt, Bore and Stroke
    292 mm × 671 mm (11.5 in × 26.4 in)
    Maximum Flow at 1,400-1,860 rpm
    153.0gal/min
    Pilot System
    Variable displacement piston
    Relief Valve Setting - Lift/Tilt
    4641.0psi
    Lift/Tilt System
    Variable displacement piston
    Maximum Flow
    13.7gal/min
    Cylinders, Double Acting - Tilt, Bore and Stroke
    292 mm × 671 mm (11.5 in × 26.4 in)
    Maximum Flow at 1,400-1,860 rpm
    153gal/min
    Relief Valve Setting
    580psi
    Pilot System
    Variable displacement piston
    Cylinders, Double Acting - Lift, Bore and Stroke
    235 mm × 976 mm (9.25 in × 38.4 in)
    Lift/Tilt System - Circuit
    EH- Positive Flow Control, Flow Sharing
    Relief Valve Setting - Lift/Tilt
    4641psi
  • Sound Performance - Suppression

  • Machine Sound Level (ISO 6395)
    109.0dB(A)
    Operator Sound Level (ISO 6396)
    70.0dB(A)
    Machine Sound Level (ISO 6395)
    109dB(A)
    Operator Sound Level (ISO 6396)
    70dB(A)
  • Brakes

  • Brakes
    SAE J1473 OCT90, ISO 3450:1992
    Brakes
    SAE J1473 OCT90, ISO 3450:1992
  • Dimensions - Millyard Linkage

  • Dump Angle at Maximum Lift
    39.4°
    Fork Height at Maximum Lift
    15.3ft
    Fork Height with Level Arms
    8.1ft
    Fork Top Clamp Opening
    12.3ft
    Front Axle Centerline to Fork Tip
    15.6ft
    Ground to Bumper Clearance
    3.1ft
    Ground to Center of Front Axle
    3.2ft
    Ground to Lower Hitch Clearance
    1.9ft
    Ground to Top of Exhaust Stacks
    13.8ft
    Ground to Top of Hood
    10.9ft
    Ground to Top of ROPS
    13.8ft
    Hinge Pin Height at Maximum Lift
    16.1ft
    Maximum Overall Length
    41ft
    Rear Axle - Centerline to Bumper
    10.5ft
    Wheel Base
    14.9ft

Equipment

  • 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, 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
    • Swing out radiator system with 6 fpi radiator cores
    • Auto-reversing fan with adjustable controls and manual cycle
    • Hinged, perforated side doors
    • 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
  • 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
  • Power Train
    • -50° C (-58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling - software
  • Operator Environment
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with bluetooth
    • LED warning strobe
    • CB radio ready
    • Window pull down visor
  • Miscellaneous Attachments
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)

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