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Large Wheel Loaders

Net Power 541 hp
Operating Weight 116362 lb
Bucket Capacities 4.7-13 m3 (6.2-17 yd3)
Engine Model Cat® C18 ACERT™

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

Operating Specifications

Operating Weight
116362lb
Rated Payload – Standard (face material)
12.5tons
Rated Payload – Standard (loose material)
16tons
Rated Payload – High Lift (face material)
12.5tons
Rated Payload – High Lift (loose material)
16tons
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Operating Weight – Standard
116362lb
Operating Weight – High Lift
119618lb
Operating Weight
116362lb
Rated Payload - High Lift (Face Material)
12.5t
Rated Payload - High Lift (Loose Material)
16t
Rated Payload - Standard (Face Material)
12.5t
Rated Payload - Standard (Loose Material)
16t
Operating Weight - High Lift
119618lb
Operating Weight - Standard
116362lb

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 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
Transmission Type
Cat switched reluctance electric drive

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
Steering Cut Off Pressure
4351psi
Total Steering Angle
86°
Steering Cycle Time (high idle)
3.4sec
Steering Cycle Time (low idle)
5.6sec

Service Refill Capacities

Fuel Tank
147gal
Cooling System (jacket water)
30gal
Cooling Systems (power train)
8gal
Engine Crankcase
16gal
Diesel Exhaust Fluid Tank
8.7gal
Transmission
16gal
Differentials and final drives – front
49gal
Differentials and final drives – rear
49gal
Hydraulic System – implement/steering
126gal
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
Fuel Tank
147gal (US)
Transmission
16gal (US)
Cooling System - Jacket Water
30gal (US)
Cooling Systems - Power Train
8gal (US)
Diesel Exhaust Fluid Tank
8.7gal (US)
Differential - Final Drives - Front
49gal (US)
Differential - Final Drives - Rear
49gal (US)
Engine Crankcase
16gal (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/Tilt System Pumps
Variable displacement piston
Lift Cylinder – Bore
8.7in
Lift Cylinder – Stroke
41.3in
Tilt Cylinder – Bore
8.7in
Tilt Cylinder – Stroke
27in
Lift/Tilt System – Circuit
EH-Positive Flow Control, Flow Sharing
Relief Valve Setting – Lift/Tilt
4757psi

Hydraulic Cycle Time

Rackback
4.5Seconds
Raise
8Seconds
Dump
2.2Seconds
Lower Float Down
3.5Seconds
Total Hydraulic Cycle Time
18.2Seconds

Brakes

Brakes
ISO 3450:2011
Brakes
ISO 3450:2011

Hydraulic System - Steering

Maximum Flow at 1,400-1,600 rpm
71.3gal/min
Steering
ISO 5010:2007
Steering Cut Off Pressure
4351psi
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°

Sound Performance - Tier 4 Final/Stage IV

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.

Hydraulic System - Lift/Tilt

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

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.
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 Cab

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

Dimensions (Approximate) - Standard Lift

Ground to Top of ROPS
13.7ft
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
14.7ft
Wheel Base
14.9ft
Maximum Overall Length
40ft
Ground to Lower Hitch Clearance
1.9ft
Ground to Center of Axles
3.2ft
Clearance at Maximum Lift
11.3ft
B-Pin Height - Maximum Lift
18ft
Maximum Overall Height - Bucket Raised
24.5ft
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.

Dimensions (Approximate) - High Lift

Ground to Top of ROPS
13.7ft
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
15.9ft
Maximum Overall Length
41.3ft
Ground to Lower Hitch Clearance
1.9ft
Ground to Center of Axles
3.2ft
Clearance at Maximum Lift
12.7ft
B-Pin Height - Maximum Lift
19.3ft
Maximum Overall Height - Bucket Raised
25.8ft
Reach - Maximum Lift
7ft
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.
Wheel Base
14.9ft

Dimensions (Approximate) – High Lift

Wheel Base
14.9ft

Hydraulic Cycle Times

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

Operator's Cab

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

Standard Equipment:

  • 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 ACERT 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:

  • 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