988K Wheel Loader

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™

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 OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent
Gross - ISO 14396
580HP
Peak Power Speed
1500/min
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
Net Power
541HP
Engine Model
Cat® C18 ™
Bore
5.7in
Stroke
7.2in
Displacement
1105in³
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
541HP

Operating Specifications

Operating Weight
112574.0lb
Rated Payload – Quarry Face
12.5tons
Rated Payload – Loose Material
16tons
Rated Payload - High Lift
12.5tons
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
112574lb
Rated Payload - Loose Material
16t
Rated Payload - Quarry Face
12.5t

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
4.0mph
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
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
Transmission Type
Cat-Planetenlastschaltgetriebe
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

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
71.3gal/min
Steering Cycle Time (high idle)
3.4sec
Steering Cycle Time (low idle)
5.6sec
Total Steering Angle
86°

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 (for Tier 4 Final/Stage IV only)
8.7gal
Fuel Tank
188gal (US)
Cooling System
31.7gal (US)
Crankcase
15.9gal (US)
Transmission
31.7gal (US)
Hydraulic System - Tank Only
63.4gal (US)
Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)
8.7gal (US)
Differential - Final Drives - Front
49.1gal (US)
Differential - Final Drives - Rear
49.1gal (US)
Hydraulic System Factory Fill
125.5gal (US)
Coolant (Validated by Test Cell Fill Quantities)
33gal (US)
Transmission - Validated by Test Cell Fill Quantities
29gal (US)

Sound Performance – Tier 4 Final/Stage IV: Standard

Machine Sound Level (ISO 6395)
111dB(A)
Operator Sound Level (ISO 6396)
72dB(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
153.0gal/min
Pilot System
Variable displacement piston
Relief Valve Setting – Lift/Tilt
4757psi

Sound Performance – Tier 4 Final/Stage IV: Suppression

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

Brakes

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

Hydraulic System - Lift/Tilt

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
153gal/min
Pilot System
Variable displacement piston
Relief Valve Setting - Lift/Tilt
4757psi
Lift/Tilt System
Variable displacement piston
Maximum Flow
13.7gal/min
Relief Valve Setting - Main
551psi
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)

Hydraulic System - Steering

Maximum Flow
71.3gal/min
Steering Cycle Times - High Idle
3.4s
Steering Cycle Times - Low Idle
5.6s
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
86 °
Relief Valve Setting - Steering
4351psi

Sound Performance - Tier 4 Final/Stage IV - Standard

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

Sound Performance - Tier 4 Final/Stage IV: Suppression

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

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Operator Sound Level ( ISO 6396)
73dB(A)
Machine Sound Level (ISO 6395)
112dB(A)

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

Dump
2.2s
Lower Float Down
3.5s
Rack Back
4.5s
Raise
8s
Total Hydraulic Cycle Time - Empty Bucket
18.2s

Sound Performance – Tier 2 Equivalent/Stage II: Standard

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

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

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

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