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988K XE 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 over 50 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988K XE brings improved sustainability and maximum efficiency to this machine platform.

Engine

Net Power - SAE J1349

538HP

Engine Model

Cat® C18 ™

Engine Power - ISO 14396

580HP

Gross Power - SAE J1995

588HP

Rated Speed

1,700 rpm

Peak Power Speed

1,500 rpm

Emissions

U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014

Bore

5.7in

Stroke

7.2in

Displacement

1105in³

Peak Torque - 1,200 rpm - SAE J1995

2230ft·lbf

Torque Rise

58%

Operating Specifications

Operating Weight

116362lb

Operating Weight - Standard

116362lb

Operating Weight - High Lift

119618lb

Rated Payload - Standard (Quarry Face)

12.5ton (US)

Rated Payload - Loose Material (Standard)

16ton (US)

Bucket Capacity Range

4.7-13 m3 (6.2-17 yd3)

Buckets

Bucket Capacities

4.7-13 m3 (6.2-17 yd3)

Transmission

Transmission Type

Cat switched reluctance electric drive

Forward 1 (virtual)

4.3mile/h

Forward 2 (virtual)

7mile/h

Forward 3 (virtual)

13.8mile/h

Forward 4 (virtual)

20mile/h

Reverse 1 (virtual)

4.3mile/h

Reverse 2 (virtual)

7mile/h

Reverse 3 (virtual)

17.5mile/h

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit

EH-Positive Flow Control, Flow Sharing

Lift/Tilt System - Pump

Variable displacement piston

Maximum Flow at 1,400-1,600 rpm

153gal/min

Relief Valve Setting - Lift/Tilt

4757psi

Lift Cylinder - Bore

8.7in

Lift Cylinder - Stroke

41.3in

Tilt Cylinder - Bore

8.7in

Tilt Cylinder - Stroke

27in

Hydraulic Cycle Times

Rack Back

4.5s

Raise

8s

Dump

2.2s

Lower Float Down

3.5s

Total Hydraulic Cycle Time

18.2s

Hydraulic System - Steering

Steering System - Circuit

Pilot, load sensing

Steering System - Pump

Piston, variable displacement

Maximum Flow at 1,400-1,600 rpm

71.3gal/min

Steering Cut Off Pressure

4351psi

Total Steering Angle

86°

Steering Cycle Times - High Idle

3.4s

Steering Cycle Times - Low Idle

5.6s

Air Conditioning System

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

13°

Brakes

Brakes

ISO 3450:2011

Operator's Cab

ROPS/FOPS

ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards

Service Refill Capacities

Fuel Tank

147gal (US)

Cooling System - Jacket Water

30gal (US)

Cooling Systems - Power Train

8gal (US)

Engine Crankcase

16gal (US)

Diesel Exhaust Fluid Tank

8.7gal (US)

Transmission

16gal (US)

Differential - Final Drives - Front

49gal (US)

Differential - Final Drives - Rear

49gal (US)

Hydraulic System - Implement/Steering

126gal (US)

Note

All nonroad Tier 4 Final/Stage V diesel engines are required to use: – The machine has the flexibility to run on either ultra-low-sulfur diesel fuel (ULSD with 15 ppm of sulfur or less). – Cat engines are compatible with the following renewable, alternati

Sound Performance - Tier 4 Final/EU Stage V - Standard

Operator Sound Level (ISO 6396)

72dB(A)

Machine Sound Level (ISO 6395)

109dB(A)

Note (1)

The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.

Note (2)

Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.

Note (3)

The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.

Dimensions (Approximate) - Standard Lift

Ground to Top of ROPS

13.8ft

Ground to Top of Exhaust Stacks

14.8ft

Ground to Top of Hood

10.9ft

Ground to Bumper Clearance

3.1ft

Rear Axle - Centerline to Bumper

10.5ft

Front Axle Centerline to Bucket Tip

14ft

Wheel Base

14.9ft

Maximum Overall Length

39.3ft

Ground to Lower Hitch Clearance

1.9ft

Ground to Center of Axles

3.2ft

Clearance at Maximum Lift

11.9ft

B-Pin Height - Maximum Lift

18ft

Maximum Overall Height - Bucket Raised

24.5ft

Reach - Maximum Lift

6.5ft

Note

Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height.

Dimensions (Approximate) - High Lift

Ground to Top of ROPS

13.8ft

Ground to Top of Exhaust Stacks

14.8ft

Ground to Top of Hood

10.9ft

Ground to Bumper Clearance

3.1ft

Rear Axle - Centerline to Bumper

10.5ft

Front Axle Centerline to Bucket Tip

15.3ft

Wheel Base

14.9ft

Maximum Overall Length

40.7ft

Ground to Lower Hitch Clearance

1.9ft

Ground to Center of Axles

3.2ft

Clearance at Maximum Lift

13.3ft

B-Pin Height - Maximum Lift

19.3ft

Maximum Overall Height - Bucket Raised

25.8ft

Reach - Maximum Lift

6.8ft

Note

Specs are calculated with 6.9 m3 (9.0 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height.

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
    • Hazardous voltage lamp
  • Operator Environment
    • Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
    • Air conditioner
    • Cat 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
    • CB radio-ready
    • Mirrors, rearview (externally mounted)
    • Rimpull Control System
    • Seat, Cat Comfort Series III, heated and ventilated, air suspension, six-way adjustable
    • Seat belt minder
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC Control System
    • UV glass
    • Virtual 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
    • 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
    • Manual switch and automatic fuel priming
    • Cat Production Measurement ready
    • Cat SR Generator/Pump Drive
    • Cat SR Drive Motor
    • Cat Integrated Powered Electronics
    • Automatic retarding controls
  • Additional Equipment
    • 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, 555 L (147 gal)
    • Hitch, drawbar with pin
    • Hoses, Cat XT
    • Hydraulic, steering and brake filtration/screening system
    • Cat Clean Emission Module
    • Oil sampling valves
    • Premixed 50 percent 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
    • Crankcase guard
    • Engine brake, SEA
  • Other Optional Configurations
    • Aggregate Handler
    • Millyard
    • Load and Carry
  • Operator Environment
    • Cat Detect, object detection system
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with Bluetooth®
    • LED warning strobe
    • Window pull down visor
    • Handrail mounted mirrors
  • Additional Equipment
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Cold Weather Starting (extra starter plus two batteries)
    • Aggregate Handler
    • Autodig feature, Tire Slip Prevention
    • Wheel Chocks
    • EZ Clean cooling system
    • Autodig features, Auto Set Tires & Lift Stall Prevention
    • Autolube with Auto shutoff
    • Tire Pressure Monitoring System
    • Load and Carry Counterweight

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