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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 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.

Cat Specs
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Engine

Peak Power Speed
1500/rpm
Rated Speed
1700/min
Bore
5.7 in
Stroke
7.2 in
Displacement
1105 in²
Torque Rise
58
Emissions
U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards, Brazil MAR-1 and China Nonroad Stage IV emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA, and U.S. EPA Tier 2 a
Engine Model
Cat® C18 ™

Buckets

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

Transmission

Forward - 3
12.7 mile/h
Forward - 4
21.6 mile/h
Reverse - 3
14.4 mile/h
Transmission Type
Cat planetary powershift
Forward - 1
4 mile/h
Forward - 2
7.2 mile/h
Direct Drive - Forward 2
7.8 mile/h
Direct Drive - Forward 3
13.9 mile/h
Direct Drive - Forward 4
24.4 mile/h
Reverse - 1
4.7 mile/h
Reverse - 2
8.3 mile/h
Direct Drive - Reverse 2
8.9 mile/h
Direct Drive - Reverse 3
15.8 mile/h

Service Refill Capacities

Differential - Final Drives - Front
49.1 gal (US)
Differential - Final Drives - Rear
49.1 gal (US)
Crankcase
15.9 gal (US)
Fuel Tank
188 gal (US)
Cooling System
31.7 gal (US)
Diesel Exhaust Fluid Tank
8.7 gal (US)
Transmission
31.7 gal (US)
Hydraulic System Factory Fill
125.5 gal (US)
Hydraulic System - Tank Only
63.4 gal (US)

Operating Specifications

Bucket Capacity Range
4.7-13 m3 (6.2-17 yd3)
Cat Truck Match - Standard
770?772
Cat Truck Match - High Lift
773?775

Hydraulic System - Lift/Tilt

Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.7 in × 41.3 in)
Relief Valve Setting - Lift/Tilt
4757 psi
Lift/Tilt System
Variable displacement piston
Pilot System
Variable displacement piston

Hydraulic System - Steering

Relief Valve Setting - Steering
4351 psi
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
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 equiv

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
13 °

Brakes

Brakes
ISO 3450:2011

Shipping

UPC
112

Operator's Cab

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

Dimensions (Approximate) - Standard Lift Linkage

Ground to Top of ROPS
13.8 ft
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Lower Hitch Clearance
1.9 ft
Reach - Maximum Lift
6.5 ft
Clearance at Maximum Lift
11.9 ft
B-Pin Height - Maximum Lift
18 ft
Maximum Overall Height - Bucket Raised
24.5 ft
Rear Axle - Centerline to Bumper
10.5 ft
Wheel Base
14.9 ft
Maximum Overall Length
39.3 ft
Front Axle Centerline to Bucket Tip
14 ft

Dimensions (Approximate) - High Lift Linkage

Ground to Top of ROPS
13.8 ft
Ground to Top of Exhaust Stacks
14.8 ft
Ground to Top of Hood
10.9 ft
Ground to Lower Hitch Clearance
1.9 ft
Reach - Maximum Lift
6.8 ft
Clearance at Maximum Lift
13.3 ft
B-Pin Height - Maximum Lift
19.3 ft
Maximum Overall Height - Bucket Raised
25.8 ft
Rear Axle - Centerline to Bumper
10.5 ft
Wheel Base
14.9 ft
Maximum Overall Length
40.7 ft
Front Axle Centerline to Bucket Tip
15.3 ft