988K XE Wheel Loader
US
Metric
Overview
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.
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
538.00 HP
401.00 kW
Engine Model
Cat® C18 ™
Engine Power - ISO 14396
580.00 HP
432.00 kW
Gross Power - SAE J1995
588.00 HP
439.00 kW
Rated Speed
1,700 rpm
Emissions
U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Peak Power Speed
1,500 rpm
Bore
5.70 in
145.00 mm
Stroke
7.20 in
183.00 mm
Displacement
1105.00 in³
18.10 l
Peak Torque - 1,200 rpm - SAE J1995
2230.00 ft·lbf
3023.00 N·m
Torque Rise
58%
Operating Specifications
Operating Weight
116362.00 lb
52781.00 kg
Operating Weight - Standard
116362.00 lb
52781.00 kg
Operating Weight - High Lift
119618.00 lb
54258.00 kg
Rated Payload - Standard (Quarry Face)
12.50 ton (US)
11.30 t
Rated Payload - Loose Material (Standard)
16.00 ton (US)
14.50 t
Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Transmission
Transmission Type
Cat switched reluctance electric drive
Forward 1 (virtual)
4.30 mile/h
7.00 km/h
Forward 2 (virtual)
7.00 mile/h
11.30 km/h
Forward 3 (virtual)
13.80 mile/h
22.20 km/h
Forward 4 (virtual)
20.00 mile/h
32.10 km/h
Reverse 1 (virtual)
4.30 mile/h
7.00 km/h
Reverse 2 (virtual)
7.00 mile/h
11.30 km/h
Reverse 3 (virtual)
17.50 mile/h
28.20 km/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
153.00 gal/min
580.00 l/min
Relief Valve Setting - Lift/Tilt
4757.00 psi
32800.00 kPa
Lift Cylinder - Bore
8.70 in
210.00 mm
Lift Cylinder - Stroke
41.30 in
1050.00 mm
Tilt Cylinder - Bore
8.70 in
269.00 mm
Tilt Cylinder - Stroke
27.00 in
685.00 mm
Hydraulic Cycle Times
Rack Back
4.50 s
4.50 s
Raise
8.00 s
8.00 s
Dump
2.20 s
2.20 s
Lower Float Down
3.50 s
3.50 s
Total Hydraulic Cycle Time
18.20 s
18.20 s
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm
71.30 gal/min
270.00 l/min
Steering Cut Off Pressure
4351.00 psi
30000.00 kPa
Total Steering Angle
86°
Steering Cycle Times - High Idle
3.40 s
3.40 s
Steering Cycle Times - Low Idle
5.60 s
5.60 s
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
147.00 gal (US)
555.00 l
Cooling System - Jacket Water
30.00 gal (US)
112.00 l
Cooling Systems - Power Train
8.00 gal (US)
30.00 l
Engine Crankcase
16.00 gal (US)
60.00 l
Diesel Exhaust Fluid Tank
8.70 gal (US)
33.00 l
Transmission
16.00 gal (US)
60.00 l
Differential - Final Drives - Front
49.00 gal (US)
186.00 l
Differential - Final Drives - Rear
49.00 gal (US)
186.00 l
Hydraulic System - Implement/Steering
126.00 gal (US)
475.00 l
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, alternative, and biodiesel* fuels that reduce greenhouse gases: Up to B20 biodiesel (FAME) ** Up to 100% HVO and GTL renewable fuels * Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Only use DEF that meets ISO 22241-1 standards.
Sound Performance - Tier 4 Final/EU Stage V - Standard
Operator Sound Level (ISO 6396)
72.00 dB(A)
72.00 dB(A)
Machine Sound Level (ISO 6395)
109.00 dB(A)
109.00 dB(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
13.80 ft
4202.00 mm
Ground to Top of Exhaust Stacks
14.80 ft
4498.00 mm
Ground to Top of Hood
10.90 ft
3334.00 mm
Ground to Bumper Clearance
3.10 ft
933.00 mm
Rear Axle - Centerline to Bumper
10.50 ft
3187.00 mm
Front Axle Centerline to Bucket Tip
14.00 ft
14.00 mm
Wheel Base
14.90 ft
4550.00 mm
Maximum Overall Length
39.30 ft
11991.00 mm
Ground to Lower Hitch Clearance
1.90 ft
568.00 mm
Ground to Center of Axles
3.20 ft
978.00 mm
Clearance at Maximum Lift
11.90 ft
3641.00 mm
B-Pin Height - Maximum Lift
18.00 ft
5479.00 mm
Maximum Overall Height - Bucket Raised
24.50 ft
7455.00 mm
Reach - Maximum Lift
6.50 ft
1981.00 mm
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
13.80 ft
4202.00 mm
Ground to Top of Exhaust Stacks
14.80 ft
4498.00 mm
Ground to Top of Hood
10.90 ft
3334.00 mm
Ground to Bumper Clearance
3.10 ft
933.00 mm
Rear Axle - Centerline to Bumper
10.50 ft
3187.00 mm
Front Axle Centerline to Bucket Tip
15.30 ft
4661.00 mm
Wheel Base
14.90 ft
4550.00 mm
Maximum Overall Length
40.70 ft
12398.00 mm
Ground to Lower Hitch Clearance
1.90 ft
568.00 mm
Ground to Center of Axles
3.20 ft
978.00 mm
Clearance at Maximum Lift
13.30 ft
4043.00 mm
B-Pin Height - Maximum Lift
19.30 ft
5881.00 mm
Maximum Overall Height - Bucket Raised
25.80 ft
7849.00 mm
Reach - Maximum Lift
6.80 ft
2062.00 mm
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.
Buckets
Bucket Capacities
4.7-13 m3 (6.2-17 yd3)
Sustainability
Recyclability
96%
Features
PROVEN RELIABILITY
LONG TERM VALUE AND DURABILITY
ACHIEVE GREATER PRODUCTIVITY
POWERFUL EFFICIENCY
PRODUCTIVITY WITH TECHNOLOGY
SAFETY FIRST
SAVE ON SERVICE AND MAINTENANCE
OPERATOR COMFORT AND CONTROL
PURPOSE-BUILT SPECIALTY MODELS
SUSTAINABILITY
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
WARNING