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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

Metric

Engine

Net Power - SAE J1349:2011

538 hp

401 kW

Engine Model

Cat® C18 ™

Engine Power - ISO 14396:2002

580 hp

432 kW

Gross Power - SAE J1995:2014

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

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

270 l/min

Steering Cut Off Pressure

4351 psi

30000 kPa

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

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)

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

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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Available Used

CAT 988K

Serial Number TWX01052

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