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Caterpillar offers partial machines and systems, working with Cat dealers and Original Equipment Manufacturers (OEMs) to provide specialty machines for specific applications. Bare chassis trucks (WTR models) can be ordered with or without hoist cylinders and most product options are identical to the dump truck models. Typically, these models come equipped with the higher Tractor ROPS certification ratings needed for specialty machines including water trucks, tow trucks, and fuel / lube trucks. These partial machine configurations are used in construction, demolition, waste, material handling, quarry, and mining applications.

The Cat Water Delivery System (WDS) is available as an optional attachment with the 777 WTR, 785D WTR, and 789D WTR Off-Highway Truck Bare Chassis and includes factory installed controls in the cab, a hydraulic pump and motor, a water pump and stainless steel spray heads. Whether your goal is dust control or haul road maintenance, the Cat WDS is designed to put water to the ground in a controlled, intelligent way. The simple to operate automated system allows you to concentrate on more important safety issues like traffic, personnel and road conditions. You'll also find that the Cat WDS not only improves safety, but also reduces truck maintenance costs, conserves water and provides significant fuel savings to help your bottom line.

Cat Specs


Gross Power - SAE J1995
1025 HP
Engine Model
Cat® C32B
Rated Engine Speed
1800 r/min
Rated Net Power - SAE J1349
916 HP
Number of Cylinders
5.7 in
6.4 in
1959 in²
Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator. U.S. EPA Tier 4 Final / EU Stage V available for applica


LRC Bare Chassis Weight without Hoist
111505 lb
LRC Bare Chassis Weight with Hoist
114067 lb
LRC Gross Vehicle Weight (Target) with Hoist
363000 lb
LRC Gross Vehicle Weight (Target) without Hoist
363000 lb
LRC model is offered for lesser regulated countries. HRC model is offered for highly regulated countries. Available as Tier 4 Final/Stage V equivalent, Tier 3/Stage IIIA equivalent, or Tier 2/Stage II


Tractor ROPS
133082 lb

Operating Specifications

Nominal Water Tank Capacity
20000 gal (US)

Service Refill Capacities

Fuel Tank Capacity
300 gal (US)
Brake/Hoist Hydraulic Tank
117 gal (US)
Brake Hoist System
85 gal (US)
Steering System - Including Tank
14.1 gal (US)
Torque Converter - Transmission System
36.5 gal (US)
28.7 gal (US)
Cooling System
63.4 gal (US)


Brake Surface - Front
6331 in²
Brake Surface - Rear
15828 in²


Steering Standards
ISO 5010:2007
Steer Angle
30.5 °
Turning Circle - Clearance Diameter
93 ft


Forward - 5
22.5 mile/h
Forward - 6
30.2 mile/h
Forward - 7
40.9 mile/h
Forward - 1
6.6 mile/h
Forward - 2
9.1 mile/h
7.5 mile/h
Forward - 3
11.9 mile/h
Forward - 4
16.6 mile/h