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

Operating Specifications

Operating Weight
116362 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)
Operating Weight - High Lift
119618 lb
Operating Weight - Standard
116362 lb

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

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
13°

Service Refill Capacities

Fuel Tank
147 gal (US)
Transmission
16 gal (US)
Cooling System - Jacket Water
30 gal (US)
Cooling Systems - Power Train
8 gal (US)
Diesel Exhaust Fluid Tank
8.7 gal (US)
Differential - Final Drives - Front
49 gal (US)
Differential - Final Drives - Rear
49 gal (US)
Engine Crankcase
16 gal (US)
Hydraulic System - Implement/Steering
126 gal (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 Cylinder - Bore
8.7 in
Lift Cylinder - Stroke
41.3 in
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
Tilt Cylinder - Bore
8.7 in
Tilt Cylinder - Stroke
27 in

Hydraulic System - Steering

Maximum Flow at 1,400-1,600 rpm
71.3 gal/min
Steering Cut Off Pressure
4351 psi
Steering Cycle Times - High Idle
3.4 s
Steering Cycle Times - Low Idle
5.6 s
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
86°
Steering
ISO 5010:2007

Hydraulic Cycle Times

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

Sound Performance - Tier 4 Final/Stage IV

Machine Sound Level (ISO 6395)
109 dB(A)
Operator Sound Level (ISO 6396)
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.
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.

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) - High Lift

B-Pin Height - Maximum Lift
19.3 ft
Clearance at Maximum Lift
12.7 ft
Front Axle Centerline to Bucket Tip
15.9 ft
Ground to Bumper Clearance
3.1 ft
Ground to Center of Axles
3.2 ft
Ground to Lower Hitch Clearance
1.9 ft
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Top of ROPS
13.7 ft
Maximum Overall Height - Bucket Raised
25.8 ft
Maximum Overall Length
41.3 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.
Reach - Maximum Lift
7 ft
Rear Axle - Centerline to Bumper
10.5 ft
Wheel Base
14.9 ft

Dimensions (Approximate) - Standard Lift

B-Pin Height - Maximum Lift
18 ft
Clearance at Maximum Lift
11.3 ft
Front Axle Centerline to Bucket Tip
14.7 ft
Ground to Bumper Clearance
3.1 ft
Ground to Center of Axles
3.2 ft
Ground to Lower Hitch Clearance
1.9 ft
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Top of ROPS
13.7 ft
Maximum Overall Height - Bucket Raised
24.5 ft
Maximum Overall Length
40 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.
Reach - Maximum Lift
6.8 ft
Rear Axle - Centerline to Bumper
10.5 ft
Wheel Base
14.9 ft

Operator's Cab

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

Brakes

Brakes
ISO 3450:2011