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 Power - ISO 14396
580HP
Engine Model
Cat® C18 ™
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 flexibillity 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, alternat
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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