988K XE Wheel Loader

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Product Description

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.

Specifications
Us
Metric
Engine
Net Power - SAE J1349
538 hp
401 kW
Engine Model
Cat® C18 ™
Engine Power - ISO 14396
580 hp
432 kW
Gross Power - SAE J1995
588 hp
439 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
5.7 in
145 mm
Stroke
7.2 in
183 mm
Displacement
1105 in³
18.1 l
Peak Torque - 1,200 rpm - SAE J1995
2230 ft·lbf
3023 N·m
Torque Rise
58%
Operating Specifications
Operating Weight
116362 lb
52781 kg
Operating Weight - Standard
116362 lb
52781 kg
Operating Weight - High Lift
119618 lb
54258 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 1 (virtual)
4.3 mile/h
7 km/h
Forward 2 (virtual)
7 mile/h
11.3 km/h
Forward 3 (virtual)
13.8 mile/h
22.2 km/h
Forward 4 (virtual)
20 mile/h
32.1 km/h
Reverse 1 (virtual)
4.3 mile/h
7 km/h
Reverse 2 (virtual)
7 mile/h
11.3 km/h
Reverse 3 (virtual)
17.5 mile/h
28.2 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 gal/min
580 l/min
Relief Valve Setting - Lift/Tilt
4757 psi
32800 kPa
Lift Cylinder - Bore
8.7 in
210 mm
Lift Cylinder - Stroke
41.3 in
1050 mm
Tilt Cylinder - Bore
8.7 in
269 mm
Tilt Cylinder - Stroke
27 in
685 mm
Hydraulic Cycle Times
Rack Back
4.5 s
4.5 s
Raise
8 s
8 s
Dump
2.2 s
2.2 s
Lower Float Down
3.5 s
3.5 s
Total Hydraulic Cycle Time
18.2 s
18.2 s
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Maximum Flow at 1,400-1,600 rpm
71.3 gal/min
270 l/min
Steering Cut Off Pressure
4351 psi
30000 kPa
Total Steering Angle
86°
Steering Cycle Times - High Idle
3.4 s
3.4 s
Steering Cycle Times - Low Idle
5.6 s
5.6 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 gal (US)
555 l
Cooling System - Jacket Water
30 gal (US)
112 l
Cooling Systems - Power Train
8 gal (US)
30 l
Engine Crankcase
16 gal (US)
60 l
Diesel Exhaust Fluid Tank
8.7 gal (US)
33 l
Transmission
16 gal (US)
60 l
Differential - Final Drives - Front
49 gal (US)
186 l
Differential - Final Drives - Rear
49 gal (US)
186 l
Hydraulic System - Implement/Steering
126 gal (US)
475 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 dB(A)
72 dB(A)
Machine Sound Level (ISO 6395)
109 dB(A)
109 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
13.8 ft
4202 mm
Ground to Top of Exhaust Stacks
14.8 ft
4498 mm
Ground to Top of Hood
10.9 ft
3334 mm
Ground to Bumper Clearance
3.1 ft
933 mm
Rear Axle - Centerline to Bumper
10.5 ft
3187 mm
Front Axle Centerline to Bucket Tip
14 ft
14 mm
Wheel Base
14.9 ft
4550 mm
Maximum Overall Length
39.3 ft
11991 mm
Ground to Lower Hitch Clearance
1.9 ft
568 mm
Ground to Center of Axles
3.2 ft
978 mm
Clearance at Maximum Lift
11.9 ft
3641 mm
B-Pin Height - Maximum Lift
18 ft
5479 mm
Maximum Overall Height - Bucket Raised
24.5 ft
7455 mm
Reach - Maximum Lift
6.5 ft
1981 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
13.8 ft
4202 mm
Ground to Top of Exhaust Stacks
14.8 ft
4498 mm
Ground to Top of Hood
10.9 ft
3334 mm
Ground to Bumper Clearance
3.1 ft
933 mm
Rear Axle - Centerline to Bumper
10.5 ft
3187 mm
Front Axle Centerline to Bucket Tip
15.3 ft
4661 mm
Wheel Base
14.9 ft
4550 mm
Maximum Overall Length
40.7 ft
12398 mm
Ground to Lower Hitch Clearance
1.9 ft
568 mm
Ground to Center of Axles
3.2 ft
978 mm
Clearance at Maximum Lift
13.3 ft
4043 mm
B-Pin Height - Maximum Lift
19.3 ft
5881 mm
Maximum Overall Height - Bucket Raised
25.8 ft
7849 mm
Reach - Maximum Lift
6.8 ft
2062 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%
Standard/Optional

Standard Equipment

NOTE
ELECTRICAL
OPERATOR ENVIRONMENT
POWER TRAIN
ADDITIONAL EQUIPMENT

Optional Equipment

NOTE
POWER TRAIN
Other Optional Configurations
OPERATOR ENVIRONMENT
ADDITIONAL EQUIPMENT

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