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988K 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 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Specifications

Metric

Engine

Net Power

541 HP

403 kW

Engine Model

Cat® C18 ™

Bore

5.7 in

145 mm

Stroke

7.2 in

183 mm

Displacement

1105 in³

18.1 l

Torque Rise

58 %

Rated Speed

1700/min

Peak Torque - 1,200 rpm

2104 lb/ft

2852 N·m

Net Power - SAE J1349

541 HP

403 kW

Peak Power Speed

1500/min

Peak Power Speed - 1,500 rpm - Gross - ISO 14396

580 HP

432 kW

Gross - ISO 14396

580 HP

432 kW

Peak Power Speed - 1,500 rpm - Gross - SAE J1995

588 HP

439 kW

Emissions

U.S. EPA Tier 4 Final/EU Stage V OR Tier 3/Stage IIIA Equivalent OR Tier 2/Stage II Equivalent

Peak Power Speed - 1,500 rpm - Net Power - SAE J1349

541 HP

403 kW

Operating Specifications

Operating Weight

112574 lb

51062 kg

Bucket Capacity Range

4.7-13 m3 (6.2-17 yd3)

Rated Payload - Quarry Face

12.5 t

11.3 t

Cat Truck Match - High Lift

773～775

Rated Payload - Loose Material

16 t

14.5 t

Cat Truck Match - Standard

770～772

Transmission

Transmission Type

Cat-Planetenlastschaltgetriebe

Forward - 1

4 mile/h

6.5 km/h

Forward - 2

7.2 mile/h

11.6 km/h

Forward - 3

12.7 mile/h

20.4 km/h

Forward - 4

21.6 mile/h

34.7 km/h

Reverse - 1

4.7 mile/h

7.5 km/h

Reverse - 2

8.3 mile/h

13.3 km/h

Reverse - 3

14.4 mile/h

23.2 km/h

Direct Drive - Reverse 2

8.9 mile/h

14.3 km/h

Direct Drive - Reverse 3

15.8 mile/h

25.5 km/h

Direct Drive - Forward 2

7.8 mile/h

12.5 km/h

Direct Drive - Reverse 1

5 mile/h

8 km/h

Direct Drive - Forward 1

Lock-up disabled

Direct Drive - Forward 3

13.9 mile/h

22.3 km/h

Direct Drive - Forward 4

24.4 mile/h

39.3 km/h

Hydraulic System - Lift/Tilt

Maximum Flow

13.7 gal/min

52 l/min

Maximum Flow at 1,400-1,860 rpm

153 gal/min

580 l/min

Lift/Tilt System

Variable displacement piston

Cylinders, Double Acting - Tilt, Bore and Stroke

269 mm × 685 mm (8.7 in × 27 in)

Relief Valve Setting - Main

551 psi

3800 kPa

Relief Valve Setting - Lift/Tilt

4757 psi

32800 kPa

Pilot System

Variable displacement piston

Cylinders, Double Acting - Lift, Bore and Stroke

210 mm × 1050 mm (8.7 in × 41.3 in)

Lift/Tilt System - Circuit

EH- Positive Flow Control, Flow Sharing

Service Refill Capacities

Fuel Tank

188 gal (US)

712 l

Cooling System

31.7 gal (US)

120 l

Crankcase

15.9 gal (US)

60 l

Transmission

31.7 gal (US)

120 l

Hydraulic System - Tank Only

63.4 gal (US)

240 l

Differential - Final Drives - Rear

49.1 gal (US)

186 l

Hydraulic System Factory Fill

125.5 gal (US)

475 l

Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage IV Only)

8.7 gal (US)

33 l

Differential - Final Drives - Front

49.1 gal (US)

186 l

Buckets

Bucket Capacities

4.7-13 m3 (6.2-17 yd3)

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

13 °

Brakes

SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

Steering System - Pump

Piston, variable displacement

Total Steering Angle

86 °

Maximum Flow

71.3 gal/min

270 l/min

Relief Valve Setting - Steering

4351 psi

30000 kPa

Steering Cycle Times - High Idle

3.4 s

Steering System - Circuit

Pilot, load sensing

Steering Cycle Times - Low Idle

5.6 s

Hydraulic Cycle Time (1,400-1,860 rpm)

Total Hydraulic Cycle Time - Empty Bucket

18.2 s

Lower Float Down

3.5 s

Rack Back

4.5 s

Raise

8 s

Dump

2.2 s

Sound Performance - Tier 4 Final/Stage IV - Standard

Operator Sound Level (ISO 6396)

72 dB(A)

Machine Sound Level (ISO 6395)

111 dB(A)

Sound Performance - Tier 4 Final/Stage IV: Suppression

Machine Sound Level (ISO 6395)

109 dB(A)

Operator Sound Level (ISO 6396)

72 dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

Operator Sound Level (ISO 6396)

72 dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Machine Sound Level (ISO 6395)

112 dB(A)

Sound Performance - Tier 2 Equivalent/Stage II: Suppression

Machine Sound Level (ISO 6395)

110 dB(A)

Service Refill Capacities

Coolant (Validated by Test Cell Fill Quantities)

33 gal (US)

125 l

Transmission - Validated by Test Cell Fill Quantities

29 gal (US)

110 l

Sound Performance - Tier 2 Equivalent/Stage II: Standard

Operator Sound Level ( ISO 6396)

73 dB(A)

Standard/Optional

Standard Equipment

NOTE

ELECTRICAL

OPERATOR ENVIRONMENT

POWER TRAIN

OTHER

Optional Equipment

NOTE

POWER TRAIN

OPERATOR ENVIRONMENT

MISCELLANEOUS ATTACHMENTS

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