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.

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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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