988 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 low cost per ton. Introduced in 1963, the 988 has been an industry leader for 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

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Specifications

Overview

Engine

Engine Power - ISO 14396:2002

432 kW

Engine Model

Cat® C18

Rated Speed

1700/rpm

Peak Power Speed

1500/rpm

Gross Power - SAE J1995:2014

439 kW

Net Power - SAE J1349:2011

401 kW

Bore

145 mm

Stroke

183 mm

Displacement

18.1 l

Peak Torque - 1,200 rpm

2852 N·m

Torque Rise

58 %

Note (1)

Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emission standards.

Note (2)

Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator.

Note (1)

* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”

Note (2)

** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.

Note (3)

The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.

Note (4)

The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.

Note (5)

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 (1)

* For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.”

Note (2)

** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701.

Note (3)

The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.

Note (4)

The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed.

Note (5)

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.

Wheel Base

4550 mm

Wheel Base

4550 mm

Weights

Operating Weight

51062 kg

Operating Specifications

Bucket Capacity Range

4.7-13 m3 (6.2-17 yd3)

Rated Payload - Quarry Face

11.3 t

Rated Payload - Loose Material

14.5 t

Cat Truck Match - Standard

770 - 772

Cat Truck Match - High Lift

773 - 775

Transmission

Transmission Type

Cat planetary powershift

Forward - 1

6.5 km/h

Forward - 2

11.6 km/h

Forward - 3

20.4 km/h

Forward - 4

34.7 km/h

Reverse - 1

7.5 km/h

Reverse - 2

13.3 km/h

Reverse - 3

23.2 km/h

Direct Drive - Forward 1

Lock-up disabled

Direct Drive - Forward 2

12.5 km/h

Direct Drive - Forward 3

22.3 km/h

Direct Drive - Forward 4

39.3 km/h

Direct Drive - Reverse 1

8 km/h

Direct Drive - Reverse 2

14.3 km/h

Direct Drive - Reverse 3

25.5 km/h

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit

EH- Positive Flow Control, Flow Sharing

Lift/Tilt System - Pump

Variable displacement piston

Relief Valve Setting - Lift/Tilt

32800 kPa

Cylinders, Double Acting - Lift, Bore and Stroke

210 mm × 1050 mm (8.7 in × 41.3 in)

Cylinders, Double Acting - Tilt, Bore and Stroke

266 mm × 685 mm (8.7 in × 27 in)

Pilot System

Variable displacement piston

Relief Valve Setting - Main

3800 kPa

Hydraulic System – Lift/Tilt

Maximum Flow at 1,400-1,860 rpm

580 L/min

Hydraulic Cycle Time

Rack Back

4.5 s

Dump

2.2 s

Lower Float Down

3.5 s

Body Hoist

Raise

8 s

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

Total Hydraulic Cycle Time - Empty Bucket

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

270 L/min

Relief Valve Setting - Steering

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 or R1234yf. See the label or instruction manual for identification of the gas. • If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons).

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

13 °

Standards

Brakes

ISO 3450:2011

ROPS/FOPS

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

Sound Performance - Tier 4 Final / Stage V

Operator Sound Pressure Level (ISO 6396:2008)

73 dB(A)

Machine Sound Power Level (ISO 6395:2008)

111 dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*

72 dB(A)

Machine Sound Power Level (ISO 6395:2008)**

109 dB(A)

Operator Sound Pressure Level (ISO 6396:2008)

73 dB(A)

Machine Sound Power Level (ISO 6395:2008)

112 dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*

72 dB(A)

Machine Sound Power Level (ISO 6395:2008)**

110 dB(A)

Service Refill Capacities

Fuel Tank

712 l

Cooling System

120 l

Coolant (validated by test cell fill quantities)

125 l

Crankcase

60 l

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

33 l

Transmission

92 l

Transmission - Validated by Test Cell Fill Quantities

110 l

Differential - Final Drives - Front

186 l

Differential - Final Drives - Rear

186 l

Hydraulic System Factory Fill

475 l

Hydraulic System - Tank Only

240 l

Turning Circle

Note

• All non-road Tier 4 Final/Stage V diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: – 20% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).** • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. * For use of blends higher than 20% biodiesel, consult your Cat dealer. ** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels.