988K XE Wheel Loader

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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
538 HP
Engine Model
Cat® C18 ™
Engine Power - ISO 14396
580 HP
Gross Power - SAE J1995
588 HP
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
5.7 in
Stroke
7.2 in
Displacement
1105 in³
Peak Torque - 1,200 rpm - SAE J1995
2230 ft·lbf
Torque Rise
58%

Operating Specifications

Operating Weight
116362 lb
Operating Weight - Standard
116362 lb
Operating Weight - High Lift
119618 lb
Rated Payload - Standard (Quarry Face)
12.5 ton (US)
Rated Payload - Loose Material (Standard)
16 ton (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)
4.3 mile/h
Forward 2 (virtual)
7 mile/h
Forward 3 (virtual)
13.8 mile/h
Forward 4 (virtual)
20 mile/h
Reverse 1 (virtual)
4.3 mile/h
Reverse 2 (virtual)
7 mile/h
Reverse 3 (virtual)
17.5 mile/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
Relief Valve Setting - Lift/Tilt
4757 psi
Lift Cylinder - Bore
8.7 in
Lift Cylinder - Stroke
41.3 in
Tilt Cylinder - Bore
8.7 in
Tilt Cylinder - Stroke
27 in

Hydraulic Cycle Times

Rack Back
4.5 s
Raise
8 s
Dump
2.2 s
Lower Float Down
3.5 s
Total Hydraulic Cycle Time
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
Steering Cut Off Pressure
4351 psi
Total Steering Angle
86°
Steering Cycle Times - High Idle
3.4 s
Steering Cycle Times - Low Idle
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)
Cooling System - Jacket Water
30 gal (US)
Cooling Systems - Power Train
8 gal (US)
Engine Crankcase
16 gal (US)
Diesel Exhaust Fluid Tank
8.7 gal (US)
Transmission
16 gal (US)
Differential - Final Drives - Front
49 gal (US)
Differential - Final Drives - Rear
49 gal (US)
Hydraulic System - Implement/Steering
126 gal (US)
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, alternati

Sound Performance - Tier 4 Final/EU Stage V - Standard

Operator Sound Level (ISO 6396)
72 dB(A)
Machine Sound Level (ISO 6395)
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
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Bumper Clearance
3.1 ft
Rear Axle - Centerline to Bumper
10.5 ft
Front Axle Centerline to Bucket Tip
14 ft
Wheel Base
14.9 ft
Maximum Overall Length
39.3 ft
Ground to Lower Hitch Clearance
1.9 ft
Ground to Center of Axles
3.2 ft
Clearance at Maximum Lift
11.9 ft
B-Pin Height - Maximum Lift
18 ft
Maximum Overall Height - Bucket Raised
24.5 ft
Reach - Maximum Lift
6.5 ft
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
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Bumper Clearance
3.1 ft
Rear Axle - Centerline to Bumper
10.5 ft
Front Axle Centerline to Bucket Tip
15.3 ft
Wheel Base
14.9 ft
Maximum Overall Length
40.7 ft
Ground to Lower Hitch Clearance
1.9 ft
Ground to Center of Axles
3.2 ft
Clearance at Maximum Lift
13.3 ft
B-Pin Height - Maximum Lift
19.3 ft
Maximum Overall Height - Bucket Raised
25.8 ft
Reach - Maximum Lift
6.8 ft
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.