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988K XE Wheel Loader

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.

Operating Weight 52781 kg
Rated Payload - Loose Material (Standard) 14.5 t
Rated Payload - Standard (Quarry Face) 11.3 t
Operating Weight - Standard 52781 kg
Operating Weight - High Lift 54258 kg
Bucket Capacity Range 4.7-13 m3 (6.2-17 yd3)

Bucket Capacities 4.7-13 m3 (6.2-17 yd3)

Engine Model Cat® C18 ™
Engine Power - ISO 14396 432 kW
Rated Speed 1,700 rpm
Peak Power Speed 1,500 rpm
Peak Torque - 1,200 rpm - SAE J1995 3023 N·m
Torque Rise 58%
Bore 145 mm
Stroke 183 mm
Displacement 18.1 l
Emissions U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014
Gross Power - SAE J1995 439 kW
Net Power - SAE J1349 401 kW

Forward 1 (virtual) 7 km/h
Forward 2 (virtual) 11.3 km/h
Forward 3 (virtual) 22.2 km/h
Forward 4 (virtual) 32.1 km/h
Reverse 1 (virtual) 7 km/h
Reverse 2 (virtual) 11.3 km/h
Reverse 3 (virtual) 28.2 km/h
Transmission Type Cat switched reluctance electric drive

Front Fixed
Oscillation Angle 13°
Rear Trunnion

Lift/Tilt System - Circuit EH-Positive Flow Control, Flow Sharing
Maximum Flow at 1,400-1,600 rpm 580 l/min
Relief Valve Setting - Lift/Tilt 32800 kPa
Lift Cylinder - Bore 210 mm
Lift Cylinder - Stroke 1050 mm
Lift/Tilt System - Pump Variable displacement piston
Tilt Cylinder - Bore 269 mm
Tilt Cylinder - Stroke 685 mm

Total Steering Angle 86°
Steering Cycle Times - High Idle 3.4 s
Steering Cycle Times - Low Idle 5.6 s
Maximum Flow at 1,400-1,600 rpm 270 l/min
Steering Cut Off Pressure 30000 kPa
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement

Fuel Tank 555 l
Transmission 60 l
Differential - Final Drives - Front 186 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.
Differential - Final Drives - Rear 186 l
Engine Crankcase 60 l
Cooling System - Jacket Water 112 l
Cooling Systems - Power Train 30 l
Diesel Exhaust Fluid Tank 33 l
Hydraulic System - Implement/Steering 475 l

Brakes ISO 3450:2011

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.

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.

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

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

Ground to Top of ROPS 4202 mm
Ground to Top of Exhaust Stacks 4498 mm
Ground to Top of Hood 3334 mm
Ground to Bumper Clearance 933 mm
Rear Axle - Centerline to Bumper 3187 mm
Front Axle Centerline to Bucket Tip 14 mm
Wheel Base 4550 mm
Maximum Overall Length 11991 mm
Ground to Lower Hitch Clearance 568 mm
Ground to Center of Axles 978 mm
Clearance at Maximum Lift 3641 mm
B-Pin Height - Maximum Lift 5479 mm
Maximum Overall Height - Bucket Raised 7455 mm
Reach - Maximum Lift 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.

Ground to Top of ROPS 4202 mm
Ground to Top of Exhaust Stacks 4498 mm
Ground to Top of Hood 3334 mm
Ground to Bumper Clearance 933 mm
Rear Axle - Centerline to Bumper 3187 mm
Front Axle Centerline to Bucket Tip 4661 mm
Wheel Base 4550 mm
Maximum Overall Length 12398 mm
Ground to Lower Hitch Clearance 568 mm
Ground to Center of Axles 978 mm
Clearance at Maximum Lift 4043 mm
B-Pin Height - Maximum Lift 5881 mm
Maximum Overall Height - Bucket Raised 7849 mm
Reach - Maximum Lift 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.

Recyclability 96%

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