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988K XE Wheel Loader
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.
- Standard Equipment
- Optional Equipment
- Specs
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
Specs
Overview
Long Name:
988K XE Wheel Loader
Name:
988K XE
Brand:
Caterpillar
Status:
Current
Engine
Net Power:
541 HP / 403 kW
Engine Model:
Cat® C18 ™
Bore:
5.7 in / 145 mm
Stroke:
7.2 in / 183 mm
Displacement:
1105 in³ / 18.1 l
Rated Speed:
1,700 rpm
Peak Torque @ (speed) - SAE J1995:
2104 ft·lbf / 2852 N·m
Net Power - SAE J1349:
541 HP / 403 kW
Torque Rise:
58%
Peak Power Speed - 1,500 rpm - Gross - ISO 14396:
580 HP / 432 kW
Emissions:
U.S. EPA Tier 4 Final/EU Stage IV
Peak Power Speed - 1,500 rpm - Gross - SAE J1995:
588 HP / 439 kW
Gross Power - ISO 14396:
580 HP / 432 kW
Peak Power Speed:
1,500 rpm
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349:
541 HP / 403 kW
Operating Specifications
Operating Weight:
116362 lb / 52781 kg
Rated Payload - Standard (Quarry Face):
12.5 ton (US) / 11.3 t
Rated Payload - Loose Material (Standard):
16 ton (US) / 14.5 t
Bucket Capacity Range:
4.7-13 m3 (6.2-17 yd3)
Transmission
Transmission Type:
Cat switched reluctance electric drive
Forward 4 (virtual):
20 mile/h / 32.1 km/h
Reverse 3 (virtual):
17.5 mile/h / 28.2 km/h
Forward 2 (virtual):
7 mile/h / 11.3 km/h
Reverse 2 (virtual):
7 mile/h / 11.3 km/h
Forward 3 (virtual):
13.8 mile/h / 22.2 km/h
Reverse 1 (virtual):
4.3 mile/h / 7 km/h
Forward 1 (virtual):
4.3 mile/h / 7 km/h
Hydraulic System - Lift/Tilt
Lift Cylinder - Bore:
8.7 in / 210 mm
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:
153 gal/min / 580 l/min
Lift Cylinder - Stroke:
41.3 in / 1050 mm
Relief Valve Setting - Lift/Tilt:
4757 psi / 32800 kPa
Tilt Cylinder - Bore:
8.7 in / 269 mm
Tilt Cylinder - Stroke:
27 in / 685 mm
Service Refill Capacities
Fuel Tank:
147 gal (US) / 555 l
Transmission:
16 gal (US) / 60 l
Cooling System - Jacket Water:
30 gal (US) / 112 l
Differential - Final Drives - Rear:
49 gal (US) / 186 l
Cooling Systems - Power Train:
8 gal (US) / 30 l
Differential - Final Drives - Front:
49 gal (US) / 186 l
Engine Crankcase:
16 gal (US) / 60 l
Diesel Exhaust Fluid Tank:
8.7 gal (US) / 33 l
Hydraulic System - Implement/Steering:
126 gal (US) / 475 l
Buckets
Bucket Capacities:
4.7-13 m3 (6.2-17 yd3)
Axles
Front:
Fixed
Rear:
Trunnion
Oscillation Angle:
13°
Brakes
Brakes:
ISO 3450:2011
Hydraulic System - Steering
Steering Cycle Times - High Idle:
3.4 s / 3.4 s
Total Steering Angle:
86°
Maximum Flow at 1,400-1,600 rpm:
71.3 gal/min / 270 l/min
Steering Cycle Times - Low Idle:
5.6 s / 5.6 s
Steering Cut Off Pressure:
4351 psi / 30000 kPa
Steering System - Circuit:
Pilot, load sensing
Steering System - Pump:
Piston, variable displacement
Hydraulic Cycle Times
Rack Back:
4.5 s / 4.5 s
Raise:
8 s / 8 s
Lower Float Down:
3.5 s / 3.5 s
Total Hydraulic Cycle Time:
18.2 s / 18.2 s
Dump:
2.2 s / 2.2 s
Sound Performance - Tier 4 Final/Stage IV
Machine Sound Level (ISO 6395):
109 dB(A) / 109 dB(A)
Operator Sound Level (ISO 6396):
72 dB(A) / 72 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.
Dimensions (Approximate) - Standard Lift
Rear Axle - Centerline to Bumper:
10.5 ft / 3187 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 Lower Hitch Clearance:
1.9 ft / 568 mm
Dimensions (Approximate) - Standard Lift
Maximum Overall Height - Bucket Raised:
24.5 ft / 7455 mm
Dimensions (Approximate) - High Lift
B-Pin Height - Maximum Lift:
19.3 ft / 5881 mm
Dimensions (Approximate) - Standard Lift
Ground to Top of ROPS:
13.7 ft / 4187 mm
Dimensions (Approximate) - High Lift
Rear Axle - Centerline to Bumper:
10.5 ft / 3187 mm
Clearance at Maximum Lift:
12.7 ft / 3882 mm
Ground to Bumper Clearance:
3.1 ft / 933 mm
Ground to Top of Hood:
10.9 ft / 3334 mm
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.
Dimensions (Approximate) - Standard Lift
Ground to Top of Exhaust Stacks:
14.8 ft / 4498 mm
Dimensions (Approximate) - High Lift
Front Axle Centerline to Bucket Tip:
15.9 ft / 4854 mm
Ground to Top of Exhaust Stacks:
14.8 ft / 4498 mm
Operating Specifications
Operating Weight - Standard:
116362 lb / 52781 kg
Dimensions (Approximate) - Standard Lift
Wheel Base:
14.9 ft / 4550 mm
Dimensions (Approximate) - High Lift
Reach - Maximum Lift:
7 ft / 2130 mm
Dimensions (Approximate) - Standard Lift
B-Pin Height - Maximum Lift:
18 ft / 5479 mm
Dimensions (Approximate) - High Lift
Maximum Overall Length:
41.3 ft / 12582 mm
Wheel Base:
14.9 ft / 4550 mm
Dimensions (Approximate) - Standard Lift
Reach - Maximum Lift:
6.8 ft / 2074 mm
Maximum Overall Length:
40 ft / 12204 mm
Dimensions (Approximate) - High Lift
Ground to Top of ROPS:
13.7 ft / 4187 mm
Service Refill Capacities
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 specifications is blended with ULSD. – 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.
Operating Specifications
Operating Weight - High Lift:
119618 lb / 54258 kg
Dimensions (Approximate) - Standard Lift
Ground to Bumper Clearance:
3.1 ft / 933 mm
Ground to Lower Hitch Clearance:
1.9 ft / 568 mm
Ground to Center of Axles:
3.2 ft / 978 mm
Hydraulic System - Steering
Steering:
ISO 5010:2007
Dimensions (Approximate) - High Lift
Ground to Center of Axles:
3.2 ft / 978 mm
Dimensions (Approximate) - Standard Lift
Front Axle Centerline to Bucket Tip:
14.7 ft / 4467 mm
Dimensions (Approximate) - High Lift
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) - Standard Lift
Clearance at Maximum Lift:
11.3 ft / 3445 mm
Sound Performance - Tier 4 Final/Stage IV
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) - High Lift
Maximum Overall Height - Bucket Raised:
25.8 ft / 7849 mm
Operator's Cab
ROPS/FOPS:
ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards
Dimensions (Approximate) - Standard Lift
Ground to Top of Hood:
10.9 ft / 3334 mm
