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The 785C Mining Truck is engineered for performance, designed for comfort, and built to last. Developed specifically for high production mining and construction applications, the 785C Mining Truck keeps material moving at high volume to lower your cost-per-ton. Rugged construction creates a durable machine. Easy maintenance procedures ensure high reliability and long life with low operating costs.


Engine Model Cat® 3512B-EUI Cat® 3512B-EUI Less
Gross Power - SAE J1995 1450.0 hp 1082.0 kW Less
Net Power - Cat 1348.0 hp 1005.0 kW Less
Net Power - ISO 9249 1348.0 hp 1005.0 kW Less
Net Power - 80/1269/EEC 1348.0 hp 1005.0 kW Less
Torque Rise 23.0 % 23.0 % Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Displacement 3158.0 in3 51.8 L Less
Net Power 1348.0 hp 1005.0 kW Less
Net Power - SAE J1349 1348.0 hp 1005.0 kW Less
Rated Power 1,750 rpm 1,750 rpm Less

Weights - Approximate

Chassis Weight 164134.0 lb 74450.0 kg Less
Operating Weight - Empty - Dual-slope Body 211035.0 lb 95725.0 kg Less
Gross Machine Operating Weight 550000.0 lb 249480.0 kg Less
Operating Weight - Empty - Flat Floor Body 225200.0 lb 102150.0 kg Less

Operating Specifications

Nominal Payload Capacity 150.0 tons 136.0 tonnes Less
Top Speed - Loaded 34.0 mph 55.0 km/h Less
Steer Angle 36.0 Degrees 36.0 Degrees Less
Raise Time 15.2 Seconds 15.2 Seconds Less
Lower Time 15.9 Seconds 15.9 Seconds Less
Machine Clearance Turning Diameter 100.3937 ft 30.6 m Less
Maximum Capacity Custom Custom Less
Maximum Capacity Struck (SAE) Custom Custom Less
SAE (2:1) Capacity 102.0 yd3 78.0 m3 Less
Turning Diameter - Front 90.2 ft 27.5 m Less

Final Drives

Differential Ratio 2.10:1 2.10:1 Less
Planetary Ratio 10.83:1 10.83:1 Less
Total Reduction Ratio 22.75:1 22.75:1 Less


Forward 1 7.5 mph 12.1 km/h Less
Forward 2 10.2 mph 16.3 km/h Less
Forward 3 13.8 mph 22.2 km/h Less
Forward 4 18.6 mph 29.9 km/h Less
Forward 5 25.2 mph 40.6 km/h Less
Forward 6 34.0 mph 54.8 km/h Less
Reverse 6.8 mph 11.0 km/h Less


Effective Cylinder Stroke - Front 12.1 in 306.5 mm Less
Effective Cylinder Stroke - Rear 6.5 in 165.0 mm Less

Body Hoists

Pump Flow - High Idle 198.0 gal/min 750.0 L/min Less
Relief Valve Setting - Raise 2500.0 psi 17238.0 kPa Less
Body Raise Time - High Idle 15.2 Seconds 15.2 Seconds Less
Body Lower Time - Float 16.2 Seconds 16.2 Seconds Less
Body Power Down - High Idle 15.9 Seconds 15.9 Seconds Less
Body Lower Time - High Idle 15.9 Seconds 15.9 Seconds Less


Brake Surface - Rear 13908.0 in2 89729.0 cm2 Less
Standards SAE J1473 OCT90 ISO 3450-1985 SAE J1473 OCT90 ISO 3450-1985 Less
Brake Surface - Front 9497.0 in2 61270.0 cm2 Less

Approximate Weights - Dual Slope

Gross Weight - Empty 211035.0 lb 95725.0 kg Less
Chassis 164134.0 lb 74450.0 kg Less
Body 46865.0 lb 21258.0 kg Less
Front Axle - Empty 47.0 % 47.0 % Less
Front Axle - Loaded 33.0 % 33.0 % Less
Rear Axle - Empty 53.0 % 53.0 % Less
Rear Axle - Loaded 67.0 % 67.0 % Less

Approximate Weights - Flat Floor

Chassis 164134.0 lb 74450.0 kg Less
Body 56630.0 lb 25687.0 kg Less
Standard Liner 4400.0 lb 1996.0 kg Less
Front Axle - Empty 47.0 % 47.0 % Less
Front Axle - Loaded 33.0 % 33.0 % Less
Rear Axle - Empty 53.0 % 53.0 % Less
Rear Axle - Loaded 67.0 % 67.0 % Less
Gross Weight - Empty 225200.0 lb 102130.0 kg Less

Weight Distributions - Approximate

Front Axle - Loaded 33.0 % 33.0 % Less
Rear Axle - Loaded 67.0 % 67.0 % Less
Front Axle - Empty 47.0 % 47.0 % Less
Rear Axle - Empty 53.0 % 53.0 % Less

Capacity - Dual Slope - 100% Fill Factor

Struck 74.0 yd3 57.0 m3 Less
Heaped (SAE 2:1) 102.0 yd3 78.0 m3 Less

Capacity - Flat Floor - 100% Fill Factor

Struck 96.0 yd3 74.0 m3 Less
Heaped (SAE 2:1) 119.0 yd3 91.0 m3 Less

Service Refill Capacities

Fuel Tank (standard) 500.0 gal 1893.0 L Less
Cooling System 100.0 gal 379.0 L Less
Crankcase 54.0 gal 204.0 L Less
Steering Tank 24.0 gal 90.0 L Less
Steering System (Includes Tank) 31.0 gal 117.0 L Less
Brake/Hoist Hydraulic Tank 89.0 gal 337.0 L Less
Brake/Hoist System (Includes Tank) 169.0 gal 641.0 L Less
Differential and Final Drives 115.0 gal 436.0 L Less
Torque Converter/Transmission System (Includes Sump) 65.51 gal 248.0 L Less


Standard Tires 33.00-R51 (E4) 33.00-R51 (E3) 33.00-R51 (E4) 33.00-R51 (E3) Less


ROPS Standards SAE J1040 APR88 ISO 3471:1994 SAE J1040 APR88 ISO 3471:1994 Less


Sound Standards ANSI/SAE J1166 MAY90 SAE J88 APR95 ANSI/SAE J1166 MAY90 SAE J88 APR95 Less


Steering Standards SAE J1511 OCT90 ISO 5010:1992 SAE J1511 OCT90 ISO 5010:1992 Less

Power Train - Engine

The Cat® 3512B EUI twin turbocharged and aftercooled diesel engine delivers high power and reliability in the world’s most demanding mining applications.

Power Train - Transmission

Cat mechanical power train delivers more power to the ground for greater productivity and lower operating costs.

Engine/Power Train Integration

Electronically combines critical power train components to work more intelligently and to optimize overall truck performance.


Rugged Cat structures are the backbone of the 785C mining truck’s durability.

Operator’s Station

Ergonomically designed for operator comfort, superior control and high productivity.

Cat® Brake System

Reliable braking with superior control gives the operator the confidence to focus on productivity.

Truck Body Systems

Caterpillar designed and built for rugged performance and reliability in the toughest mining applications.

Monitoring System

Vital machine health and payload data keeps the 785C performing at peak production levels.


Cat mining machines and system are designed with safety as their first priority.


A variety of features improve sustainability in areas of decreasing waste, extending component life and lowering emissions levels.


Less time spent on maintenance means more time on the haul roads.

Customer Support

Cat dealers have what it takes to keep mining trucks productive.

785C Standard Equipment

Air Cleaner with Precleaner (2)

Air Conditioner

Air Line Dryer (2)

Air Starter, Vane-type

Alarm, Back-up

Alternator (105-amp)

Automatic Retarder Control

Batteries, 93-amp-hour, Low-maintenance, 12-volt (2)

Body Mounting Group

Body Prop Cable

Brake Release Motor for Towing

Brake System
  • Oil-cooled, Multiple-disc, Front and Rear
  • Parking
  • Secondary, Emergency

  • Ashtray
  • Cigarette Lighter
  • Coat Hook
  • Diagnostic Connector
  • Electric Window (Operator Only)
  • Entertainment Radio Ready
  • Glass, Tinted
  • Heater/defroster: 11 070 kCal (43,930 BTU)
  • Horn
  • Insulated and Sound Suppressed
  • Integrated Object Detection System
  • Light, Dome/courtesy
  • Mirrors, Right and Left
  • Quad-Gauge Panel
  • Seat, Air Suspension
  • Seat, Passenger, Non-suspension
  • Seat Belts, 75 mm (3") wide retractable
  • Speedometer
  • Steering, Automatic Supplemental
  • Steering Wheel, Tilt, Padded, Telescopic
  • Storage Compartment
  • Sun Visor
  • Tachometer
  • Transmission Gear Indicator
  • VIMS Dataports (2)
  • VIMS Keypad
  • VIMS Message Center with Universal Gauge
  • Windshield Wiper and Washer

Crankcase Protection

Driveline Operator Safety Guard

Dumping, Auxiliary Quick Connect for "Buddy Dumping"

Electrical System, 24-volt to 12-volt

Engine - Cat 3512B with Electronic Injection and Multi Point Oil Pressure Sensing

Fast-fill Fuel System, Wiggins

Ground Level
  • Battery Disconnect
  • Engine Shutdown
  • VIMS Dataport

Lighting System
  • Back-up Lights, Halogen
  • Direction Signals and Hazard Warning (Rear Halogen)
  • Headlights, Halogen, With Dimmer
  • LH Ladder Light and Service Deck Lights
  • Stop and Tail Lights (LED)
  • Under-hood Light

Oil Change System, Quick Service

Reservoirs (Separate)
  • Brake/converter/hoist
  • Steering
  • Transmission

Rims, Center Mounted for 33.00-R51 Tires

Rock Ejectors

Starting Aid, Ether, Automatic

Steering, Auxiliary Quick Connect for Towing

Tie Down Eyes

Tow Hooks, Front

Tow Pin, Rear

Traction Control System

Transmission, Six-speed, Automatic Power Shift, Electronic Control and Downshift Inhibitor, Reverse Neutralizer during Dumping, and Neutral Start Switch, Reverse Shift Inhibitor, Controlled Throttle Shifting, Directional Shift Management, Neutral Coast Inhibitor, Body-up Shift Inhibitor

Vandalism Protection Locks

Vital Information Management System with True Weight Production Manager

785C Optional Equipment

  • see Weight/Payload Calculation chart

Body extensions:
  • Tail
  • Sideboards1

Body heat (exhaust)

Body and tail extension liners2
  • Full-length liner
  • Tail extension liner3
  • Grid liner4

Fuel tank 2500 L (660 gal)

Heater, fuel recirculation type, non-electric

Heater, engine coolant and oil 120-volt external power source

Heater, engine coolant and oil 240-volt external power source

Oil Renewal System

Prelube system

Rim, spare for 33.00-R51 tire

Shutter group, inside mounted

Starting system
  • Air (TDI Turbine)
  • Air (IR Turbine)

Variable pitch fan, Flexxaire

Variable speed fan, Rockford

1 Increases capacity to 91 m3/119 yd3

2 Minimum yield strength 900 mPa/9000 Bar/130,500 psi; 400 Brinell steel

3 Use with full liners when tail extension used

4 Covers rear third of body only