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 541HP
Engine Model Cat® C18 ™
Bore 5.7in
Stroke 7.2in
Displacement 1105in³
Rated Speed 1,700 rpm
Peak Torque @ (speed) - SAE J1995 2104ft·lbf
Net Power - SAE J1349 541HP
Torque Rise 58%
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580HP
Emissions U.S. EPA Tier 4 Final/EU Stage V
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588HP
Gross Power - ISO 14396 580HP
Peak Power Speed 1,500 rpm
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541HP

Operating Specifications

Operating Weight 116362lb
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)
Operating Weight - Standard 116362lb
Operating Weight - High Lift 119618lb

Buckets

Bucket Capacities 4.7-13 m3 (6.2-17 yd3)

Transmission

Transmission Type Cat switched reluctance electric drive
Forward 4 (virtual) 20mile/h
Reverse 3 (virtual) 17.5mile/h
Forward 2 (virtual) 7mile/h
Reverse 2 (virtual) 7mile/h
Forward 3 (virtual) 13.8mile/h
Reverse 1 (virtual) 4.3mile/h
Forward 1 (virtual) 4.3mile/h

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13°

Service Refill Capacities

Fuel Tank 147gal (US)
Transmission 16gal (US)
Cooling System - Jacket Water 30gal (US)
Differential - Final Drives - Rear 49gal (US)
Cooling Systems - Power Train 8gal (US)
Differential - Final Drives - Front 49gal (US)
Engine Crankcase 16gal (US)
Diesel Exhaust Fluid Tank 8.7gal (US)
Hydraulic System - Implement/Steering 126gal (US)
Note All non-road Tier 4 Final/Stage IV 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) or up to B20 biodiesel when feedstock meeting ASTM D7467 specificat

Hydraulic System - Lift/Tilt

Lift Cylinder - Bore 8.7in
Lift/Tilt System - Pump Variable displacement piston
Lift/Tilt System - Circuit EH-Positive Flow Control, Flow Sharing
Maximum Flow at 1,400-1,600 rpm 153gal/min
Lift Cylinder - Stroke 41.3in
Relief Valve Setting - Lift/Tilt 4757psi
Tilt Cylinder - Bore 8.7in
Tilt Cylinder - Stroke 27in

Hydraulic System - Steering

Steering Cycle Times - High Idle 3.4s
Total Steering Angle 86°
Maximum Flow at 1,400-1,600 rpm 71.3gal/min
Steering Cycle Times - Low Idle 5.6s
Steering Cut Off Pressure 4351psi
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Steering ISO 5010:2007

Hydraulic Cycle Times

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

Sound Performance - Tier 4 Final/Stage IV

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

Rear Axle - Centerline to Bumper 10.5ft
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.
Maximum Overall Height - Bucket Raised 24.5ft
Ground to Top of ROPS 13.7ft
Ground to Top of Exhaust Stacks 14.8ft
Wheel Base 14.9ft
B-Pin Height - Maximum Lift 18ft
Reach - Maximum Lift 6.8ft
Maximum Overall Length 40ft
Ground to Bumper Clearance 3.1ft
Ground to Lower Hitch Clearance 1.9ft
Ground to Center of Axles 3.2ft
Front Axle Centerline to Bucket Tip 14.7ft
Clearance at Maximum Lift 11.3ft
Ground to Top of Hood 10.9ft

Dimensions (Approximate) - High Lift

Ground to Lower Hitch Clearance 1.9ft
B-Pin Height - Maximum Lift 19.3ft
Rear Axle - Centerline to Bumper 10.5ft
Clearance at Maximum Lift 12.7ft
Ground to Bumper Clearance 3.1ft
Ground to Top of Hood 10.9ft
Front Axle Centerline to Bucket Tip 15.9ft
Ground to Top of Exhaust Stacks 14.8ft
Reach - Maximum Lift 7ft
Maximum Overall Length 41.3ft
Wheel Base 14.9ft
Ground to Top of ROPS 13.7ft
Ground to Center of Axles 3.2ft
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.
Maximum Overall Height - Bucket Raised 25.8ft

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.

Operator's Cab

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

Brakes

Brakes ISO 3450:2011

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 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
  • 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
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, 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
Operator Environment
  • Cab precleaner
  • AM/FM/CD/MP3 radio
  • Satellite Sirius radio with Bluetooth®
  • LED warning strobe
  • 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
  • Tire Pressure Monitoring System
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