The 789D bare chassis comes equipped with a higher Tractor ROPS certification ratings needed for specialty machines including water trucks, tow trucks, and fuel and lube trucks.

Off-Highway Trucks Bare Chassis 789D Bare Chassis

Request A Price Find Dealer

Key Specs

LRC Bare Chassis Weight without Hoist
222975 lb
101140 kg
Tractor ROPS
257940 lb
117000 kg
Nominal Water Tank Capacity
42288 gal (US)
160000 l


Customization to Work for Your Application.

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 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 higher Tractor ROPS certification ratings needed for specialty machines including water trucks, tow tractors, 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 on the 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.

Product Specifications for 789D Bare Chassis

Engine Model Cat® 3516C HD Cat® 3516C HD
Rated Engine Speed 1750 r/min 1750 r/min
Gross Power - SAE J1995 2100 HP 1566 kW
Rated Net Power - SAE J1349 1969 HP 1468 kW
Bore 6.7 in 170 mm
Stroke 8.5 in 215 mm
Displacement 4766 in³ 78.1 l
Note Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator. Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator.
LRC Bare Chassis Weight without Hoist 222975 lb 101140 kg
LRC Bare Chassis Weight with Hoist 228619 lb 103700 kg
LRC Gross Vehicle Weight (Target) with Hoist 705478 lb 320000 kg
LRC Gross Vehicle Weight (Target) without Hoist 705478 lb 320000 kg
Nominal Water Tank Capacity 42288 gal (US) 160000 l
Tractor ROPS 257940 lb 117000 kg
Forward - 1 7.8 mile/h 12.6 km/h
Forward - 2 10.6 mile/h 17.1 km/h
Forward - 3 14.4 mile/h 23.1 km/h
Forward - 4 19.4 mile/h 31.2 km/h
Forward - 5 26.3 mile/h 42.3 km/h
Forward - 6 35.5 mile/h 57.2 km/h
Reverse 7.3 mile/h 11.8 km/h
Note Maximum travel speeds with standard 37.00-R57 tires Maximum travel speeds with standard 37.00-R57 tires
Brake Surface - Front 12662 in² 81693 cm²
Brake Surface - Rear 20862 in² 134590 cm²
Fuel Tank Capacity 550 gal (US) 2082 l
Cooling System 192 gal (US) 725 l
Crankcase 77 gal (US) 291 l
Differential - Final Drives 154 gal (US) 583 l
Steering System - Including Tank 50 gal (US) 189 l
Brake Hoist System 241 gal (US) 909 l
Steering Standards ISO 5010:2019 ISO 5010:2019
Steer Angle 36 ° 36 °
Turning Diameter 90.32 ft 27.53 m
Turning Circle - Clearance Diameter 99.18 ft 30.23 m

789D Bare Chassis Standard Equipment

For bare chassis standard and optional equipment, please reference the 789D Off-Highway Truck. For more information on 789D Bare Chassis options, please contact Caterpillar OEM Solutions at


  • Cat 3516C HD-EUI diesel engine: Ground level engine shutdown, Ether starting aid (automatic), Aftercooler (separate circuit or air to air), Elevated low idle control, Automatic starter protection, Multi-point oil pressure sensing
  • Braking System: Brake release motor (towing), Oil-cooled, Multiple-disc (front and rear) - service, retarding, parking, secondary, Automatic retarder control, Engine overspeed protection, Extended life brake disc
  • Transmission: 6-speed automatic powershift with electric control (TCC), Body-up shift inhibitor, Controlled throttle shifting, Directional shift management, Downshift/reverse shift inhibitor, Individual clutch modulation, Neutral coast inhibitor/start switch, Body-up reverse neutralizer, Programmable top gear, Lock-up torque convertor, Caterpillar flexible core radiator
  • Extended life coolant to -35° C (-30° F)


  • Alarm, Back-up
  • Alternator, 105 ampere
  • Batteries, 12V (2), 93 amp/hour
  • Converter, 12V electrical
  • Electrical system, 24V, 15 amp
  • Lighting System, LED: Backup and hazard lights, Directional signals, front and rear, Headlights amd foglights, Lo-hi beam selector, Left-hand ladder/service deck, Stop/tail lights, Engine compartment, VIMS, blue light
  • Payload, indicator lights


  • Air Conditioner
  • Auxiliary power connection/cigarette lighter
  • Diagnostic connection port
  • Dome courtesy light
  • Entertainment radio ready: 5 amp converter, speakers, antenna, wiring harness
  • Gauges/Indicators: Air cleaner service indicator, Quad gauge panel: Air pressure, Brake oil temperature, Engine coolant temperature, Fuel level, Electric engine control fault indicator, Electric hour meter/tachometer, Speedometer, Tachometer, Transmission gear indicator, VIMS message center with universal gauge, VIMS keypad, Heater/defroster
  • Hoist, body control (electric)
  • Horn
  • Mirrors, right and left (heated)
  • ROPS cab insulated/sound suppressed
  • Seatbelt, operator, park brake safety / seatbelt trainer
  • Stairway and walkway access, 600 mm
  • Steering wheel, tilt, padded, telescopic
  • Window, electric powered, operator
  • Windshield wiper, intermittent control, and washer


  • Grease injector
  • Air line dryer
  • Auto lubrication system
  • Aux "buddy" dumping quick connect
  • Aux steering quick connect (towing)
  • Body mounting group
  • Center mounted rims (6) (29x57)--(Used for 37.00 R57 tires)
  • Driveline guard (fully enclosed)
  • Fast-fill Fuel System
  • Ground level VIMS data port
  • Ground level battery disconnect
  • Rock ejectors
  • Supplemental steering (automatic)
  • Tow hooks (front)/tow pin (rear)
  • Traction control system
  • Vital Info Management System (VIMS)
  • Mounting, Water without Hoist Cylinder


  • Object Detection System (cameras and radar)
  • Product Link Elite

789D Bare Chassis Optional Equipment


  • Engine pre-lube
  • Oil cooler, rear axle


  • Auxiliary work lights (1) RH side, (1) LH side
  • Lockout transmission, ground level
  • Payload, digital display


  • Footrest, operator
  • Deluxe Cab: includes suspended operator seat, suspended companion seat, retractable front windshield visor, cab cleanout


  • Powered Stairway
  • Working at Heights
  • Rear axle, cooler
  • Cold weather: Brake oil, recirculating, Cold weather start
  • Service center: Service, 3516C, standard volume / Service, 3516C, large volume / Service, engine oil, standard
  • Fire extinguisher, portable
  • Hub odometer, kilometers
  • Wheel chocks
  • Gauge, brake wear indicator
  • Coolant, -50° C (-58° F)


  • Control, Road Analysis (RAC)


  • Water System Monitor: integrated into cab, programmable spray configurations, automatic diagnostic messages
  • Variable Hydraulic Pump Drive: 1,200 gpm at speeds of 3 to 25 mph with auto shut-off and soft startup
  • Independent Hydraulic Cooling System: minimizes overheating
  • Stainless Steel Spray Heads: maintenance free, patented design resists corrosion
  • Controls: Factory installed and integrated into cab
  • Parts & service available through global Cat dealer network
  • Water Cannon: hydraulically controlled, integrated joystick with cab controls, optional nozzles

See how 789D Bare Chassis compares against frequently compared products.

Tools And Expert Help At Every Turn

Product Brochures and More Are Ready to Download!

Check out current offers for the 789D Bare Chassis

View More Offers