Off-Highway Trucks Bare Chassis

785 WTR Bare Chassis

LRC Bare Chassis Weight without Hoist

184,582 lb

Tractor ROPS

231,485 lb

Nominal Water Tank Capacity

30,000 gal (US)


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 tractors, and fuel / lube trucks. These partial machine configurations are used in construction, demolition, waste, material, handling, quarry, and mining applications.


    Brake Surface - Front

    9,487 in²

    Brake Surface - Rear

    13,908 in²


    Engine Model

    Cat® 3512E

    Gross Power - SAE J1995

    1,600 HP

    Rated Net Power - SAE J1349

    1,509 HP


    6.7 in


    8.5 in


    3,573 in³

    Rated Engine Speed

    1,650 r/min


    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 applicable markets.

    Operating Specifications

    Nominal Water Tank Capacity

    30,000 gal (US)


    Tractor ROPS

    231,485 lb

    Service Refill Capacities

    Fuel Tank Capacity

    410 gal (US)

    Cooling System

    100 gal (US)


    54 gal (US)

    Differential - Final Drives

    139 gal (US)

    Steering System - Including Tank

    45 gal (US)

    Brake/Hoist Hydraulic Tank

    135 gal (US)

    Brake Hoist System

    160 gal (US)

    Torque Converter - Transmission System

    46 gal (US)


    Steering Standards

    ISO 5010:2007

    Steer Angle

    36 °

    Turning Diameter

    97.75 in


    Forward - 1

    7.5 mile/h

    Forward - 2

    10.2 mile/h

    Forward - 3

    13.8 mile/h

    Forward - 4

    18.6 mile/h

    Forward - 5

    25.2 mile/h

    Forward - 6

    34 mile/h


    6.8 mile/h


    LRC Bare Chassis Weight without Hoist

    184,582 lb

    LRC Bare Chassis Weight with Hoist

    188,766 lb

    LRC Gross Vehicle Weight (Target) without Hoist

    550,000 lb

    LRC Gross Vehicle Weight (Target) with Hoist

    550,000 lb

    HRC Bare Chassis Weight without Hoist

    187,068 lb

    HRC Bare Chassis Weight with Hoist

    191,253 lb

    HRC Gross Vehicle Weight (Target) without Hoist

    550,000 lb

    HRC Gross Vehicle Weight (Target) with Hoist

    550,000 lb


    LRC model is offered for lesser regulated countries. HRC model is offered for highly regulated countries. U.S. EPA Tier 4 Final / EU Stage V available for applicable markets.

    • For more information on 785 WTR Bare Chassis options, please contact Caterpillar OEM Solutions at
      • 24V electrical system, low maintenance batteries (2) 93 amp-hour
      • Alarm, backup
      • Brushless alternator, 225 amp
      • Ground accessible power control box: Ethernet VIMS™ port and VIMS lamp; Engine starter; transmission and battery lockouts
      • Jump start/battery charge receptacle
      • LED payload indicator lamps
      • LED Lighting system: Back-up and hazard lights, Curb lights, (one) RH side, (one) LH side, Turn signals (front and rear), Engine compartment lights, Headlights with low-high beam selector, Ladder light and service deck lights, Stop/tail lights
    • FLUIDS
      • Extended Life Coolant to — 35° C (— 30° F)
      • 5V USB charging port
      • 12V auxiliary power connection
      • Cup holders
      • Diagnostic connection port COM3 and Ethernet
      • Delayed Engine Shutdown
      • Dome courtesy light and map lights
      • Entertainment radio ready: Speakers, Optional Antenna (AM/FM/WB/satellite radio), Radio mounting provisions and 12V power supply
      • Fire suppression ready
      • Floor mat, multi-piece & replaceable
      • Gauges and indicators panel: Critical oil and coolant temperatures; Fuel and DEF level (if applicable); Engine system, brake and transmission fault indicators; Operator selectable max. machine speed by rotary dial; Speedometer, Tachometer
      • Heated mirrors, right and left
      • Hoist, body control
      • Interactive touchscreen vehicle information display: Day/night mode; Action alarm; Quad gauge display
      • Operator and trainer air suspension seats
      • Operator Door Power Window
      • Provision for customer accessory mounting
      • Push button secure start
      • Retractable front visor
      • ROPS cab, insulated/sound suppressed
      • Stairway and walkway access, 600 mm (24 in)
      • Steering wheel, tiltable, telescopic
      • Self-filling to windshield washer fluid from AC condensate
      • Storage locations for operator gear
      • Three point seat belt for operator seat
      • Windshield wiper, intermittent control / washer
      • Unitized hydraulic powered HVAC with automatic temperature control
      • Ventilated operator seat
      • 33R51 power train with standard rims
      • Cat 3512E engine: Automatic engine and DEF thermal management (if applicable); Automatic low voltage idle management; Air cleaner with precleaner (two); Turbocharging (four) with air-to-air aftercooler; Mechanical Electronic Unit Injector (MEUI™-A) fuel system; Automatic starter protection; Automatic ether starting aid
      • Hydraulic braking system: Automatic retarder control (ARC), adjustable and automatic; Brake release motor (towing); Engine over speed protection; Extended life brake disc material; Hill start assist/Anti roll back strategy; Oil-cooled, multi-disc (front and rear) — Service, retarding, parking, secondary; Park brake integrated with gear selector
      • Transmission :Six-speed, automatic power shift with Electronic Clutch Pressure Control (ECPC); Advanced Productivity Electronic Control Strategy (APECS); Body-up reverse neutralizer; Body-up shift inhibitor; Downshift/reverse shift inhibitor; Directional shift management; Enhanced Traction Control System; Programmable top gear; Oil level sensor; Neutral coast inhibitor; Neutral start switch; Lock-up torque converter; Rear axle continuous lubrication/filtration
      • Turbine air starter with air tank, air horn and automatic lubrication system
      • Auxiliary "buddy" dumping quick connect
      • Auxiliary connection 'user defined shutdown'
      • Auxiliary steering quick connect (towing)
      • eOMM
      • Fast fill fuel and DEF remote fill system
      • Guards for rotating components
      • Hill Start Assist
      • Hydraulic Filters, 1,000 hours
      • Remote flash software and troubleshooting
      • Secondary steering (automatic)
      • Tie off points
      • Tow hooks (front) and tow pin (rear)
      • Sight glasses for hydraulic oils
      • S•O•S℠ ports
      • Vital Information Management System (VIMS)
    • Cat Technology Products
      • Cyber security
      • Integrated object detection system with touchscreen display
      • Tire Payload Monitoring System 2 (TPMS 2)
      • Product Link™ Elite

      • Auxiliary rear work lights, (one) LH side
      • Digital Payload Display
      • LED Lighting system: Additional lighting package, Auxiliary VIMS, Body rear, Seat & park brake
      • Workshop horn
    • FLUIDS
      • Extended Life Coolant to — 50° C (— 58° F)
      • Emergency stop
      • Deluxe Cab: Advanced cabin filtration system; Catwalk and handrails for rear cab access; Heated, cooled and ventilated front seat; Power right side window; Suspended companion seat; Storage tray
      • No air – electric starter with 93-amp hour batteries (four), electric horn and automatic lubrication system
      • Hydraulic braking system: Advanced ground control with Anti-lock Braking System (ABS) and Dynamic Stability Control (DSC)
      • Variable speed fan drive
      • Transmission: Engine pre-lubrication system; Rear axle continuous lubrication/filtration with cooler
      • 2560 L (676 gal) fuel tank (non-Tier 4)
      • Bumper towing – center pin kit
      • Cold weather start (block heater)
      • Communication Ar – Minestar™ radio
      • Fire extinguisher, portable
      • Five piece crankcase guards
      • Fuel heater, fuel water separator
      • Fuel tank mud guard
      • Gauge, brake wear indicator
      • Ground accessible fluid service center, hydraulic and coolant
      • Hub odometer, kilometers
      • Powered access stairway
      • Rim Diffuser
      • Wheel chocks
      • Wireless Electronic Technician (ET)
      • Working at heights protection
    • Cat Technology Products
      • Cruise control
      • 360 degree surround view camera
      • 4G cellular/satellite dual mode
      • Connectivity bundle (includes: wireless operator ID, bluetooth key FOB to start)
      • Driver Safety System (DSS) 4.0 Ready
      • Minestar GPS
      • Minestar communication group (enables: Minestar Fleet, Aux, and Truck Spotting)
      • Oil Renewal System (ORS) (non-Tier 4)
      • Road Analysis Control (RAC)


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