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The 789C Mining Truck is engineered for performance, designed for comfort, and built to last. Developed specifically for high production mining and hauling applications, the 789C 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 3516B EUI Cat 3516B EUI Less
Gross Power – SAE J1995 1900.0 hp 1417.0 kW Less
Net Power – ISO 9249 1791.0 hp 1335.0 kW Less
Net Power – 80/1269/EEC 1791.0 hp 1335.0 kW Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Displacement 4211.0 in3 69.0 L Less
Net Power – SAE J1349 1771.0 hp 1320.0 kW Less

Weights – Approximate

Chassis Weight 218300.0 lb 99020.0 kg Less
Body Weight Range 26 800-29 950 kg (59,000-71,500 lb) 26 800-29 950 kg (59,000-71,500 lb) Less
Gross Machine Operating Weight 700000.0 lb 317515.0 kg Less

Operating Specifications

Nominal Payload Capacity 195.0 tons 177.0 tonnes Less
Body Capacity (SAE 2:1) 137.0 yd3 105.0 m3 Less
Top Speed – Loaded 32.7 mph 52.6 km/h Less
Steer Angle 36.0 Degrees 36.0 Degrees Less
Maximum Capacity Custom Custom Less
Turning Circle Clearance Diameter 99.2 ft 30.2 m Less
Turning Diameter – Front 90.2 ft 27.5 m Less

Final Drives

Differential Ratio 2.35:1 2.35:1 Less
Planetary Ratio 10.83:1 10.83:1 Less
Total Reduction Ratio 25.46:1 25.46:1 Less


Forward 1 7.2 mph 11.6 km/h Less
Forward 2 9.8 mph 15.7 km/h Less
Forward 3 13.2 mph 21.3 km/h Less
Forward 4 17.8 mph 28.7 km/h Less
Forward 5 24.2 mph 38.9 km/h Less
Forward 6 32.7 mph 52.6 km/h Less
Reverse 6.5 mph 10.5 km/h Less


Effective Cylinder Stroke – Front 4.0 in 105.0 mm Less
Effective Cylinder Stroke – Rear 3.5 in 93.0 mm Less
Rear Axle Oscillation ±5.6° ±5.6° Less

Body Hoists

Pump Flow – High Idle 193.0 gal/min 731.0 L/min Less
Relief Valve Setting – Raise 2500.0 psi 17238.0 kPa Less
Body Raise Time – High Idle 18.9 Seconds 18.9 Seconds Less
Body Lower Time – Float 17.3 Seconds 17.3 Seconds Less
Body Power Down – High Idle 15.6 Seconds 15.6 Seconds Less


Brake Surface – Rear 18024.0 in2 116283.0 cm2 Less
Standards SAE J1473 OCT90 ISO 3450:1996 SAE J1473 OCT90 ISO 3450:1996 Less
Brake Surface – Front 12662.0 in2 81693.0 cm2 Less

Approximate Weights – Dual Slope

Gross Weight – Empty 310525.0 lb 140852.0 kg Less
Chassis 225500.0 lb 102285.0 kg Less
Body 59625.0 lb 27045.0 kg Less
Full Liner 20840.0 lb 9453.0 kg Less
Tail Extension 1700.0 lb 771.0 kg Less
Side Boards 2860.0 lb 1297.0 kg Less

Approximate Weights – Flat Floor

Chassis 225400.0 lb 102240.0 kg Less
Body 66200.0 lb 30018.0 kg Less
Grid Liner 3300.0 lb 1500.0 kg Less
Rear Third Liner 4200.0 lb 1905.0 kg Less
Gross Weight – Empty 299100.0 lb 135670.0 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 96.0 yd3 73.0 m3 Less
Heaped (SAE 2:1) 137.0 yd3 105.0 m3 Less

Capacity – Flat Floor – 100% Fill Factor

Struck 102.0 yd3 92.0 m3 Less
Heaped (SAE 2:1) 158.0 yd3 121.0 m3 Less

Service Refill Capacities

Fuel Tank (standard) 851.0 gal 3222.0 L Less
Cooling System 175.0 gal 663.0 L Less
Crankcase 77.0 gal 291.0 L Less
Steering Tank 34.0 gal 130.0 L Less
Steering System (Includes Tank) 50.0 gal 189.0 L Less
Brake/Hoist Hydraulic Tank 140.0 gal 531.0 L Less
Brake/Hoist System (Includes Tank) 240.0 gal 909.0 L Less
Differential and Final Drives 154.0 gal 583.0 L Less
Torque Converter/Transmission Sump 59.0 gal 224.0 L Less
Torque Converter/Transmission System (Includes Sump) 20.0 gal 76.0 L Less


Standard Tires 37.00-R57 (E4) 37.00-R57 (E4) Less


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

Power Train – Engine

The Cat® 3516B EUI engine is built for power, reliability and efficiency for superior performance in the toughest 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 789C 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

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

Monitoring System

Vital machine health and payload data keeps the 789C performing at peak production levels.


Cat mining machines and systems 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 haul trucks productive.

789C Standard Equipment

Air Line Dryer (2)

Air Starter, Vane-type

Alarm, Back-up

Alternator (105-amp)

Automatic Lubrication System (Lincoln)

Automatic Retarder Control

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

Body Mounting Group

Body Retaining Cable

Brake Release Motor for Towing

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

  • Air Cleaner Service Indicator
  • Air Conditioner
  • Ashtray
  • Cigarette Lighter
  • Coat Hook
  • Diagnostic Connector
  • Electric Engine Control Fault Indicator
  • 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
  • Dome Courtesy Light
  • Mirrors, Right and Left
  • Quad-Gauge Panel
  • Seat, Air Suspension, 3-point Operator Restraint
  • Seat, Passenger, Non-suspension
  • Seat Belts, 3-point, 75 mm (3 in) wide retractable
  • Speedometer
  • Steering, Automatic Supplemental
  • Steering Wheel, Tilt, Padded, Telescopic
  • Storage Compartment
  • Sun Visor
  • Tachometer
  • Transmission Gear Indicator
  • VIMS Keypad
  • VIMS Message Center with Universal Gauge
  • Windshield Wiper and Washer

Driveline Guard

Dumping, Auxiliary Quick Connect for “Buddy Dumping”

Electrical System, 12-volt to 24-volt

Engine – Cat 3516B EUI Diesel Engine
  • Air Cleaner with Precleaner (2)
  • Elevated Low Idle Control
  • Ether Starting Aid, Automatic
  • Multi-Point Oil Pressure Sensing
  • Turbocharger (4)/Aftercooler

Fast-fill Fuel System, Wiggins

Ground Level
  • Battery Disconnect
  • Engine Shutdown
  • VIMS Dataports (2)

Lighting System
  • Back-up Lights, Halogen
  • Direction Signals and Hazard Warning (Rear Halogen)
  • External Payload Lights, red/green
  • 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 37.00-R57 Tires

Rock Ejectors

Steering, Auxiliary Quick Connect for Towing

Tie Down Eyes

Tow Hooks, Front

Tow Pin, Rear

Traction Control System

  • 6-speed, Automatic Power Shift
  • Body-up Shift Inhibitor
  • Controlled Throttle Shifting
  • Directional Shift Management
  • Electronic Control and Downshift Inhibitor
  • Lock-up Torque Converter
  • Neutral Coast Inhibitor
  • Neutral Start Switch, Reverse Shift Inhibitor
  • Programmable Top Gear
  • Reverse Neutralizer during Dumping

Vandalism Protection Locks

VIMS Monitoring System with Max Payload Speed Manager

789C Optional Equipment

  • see Weight/Payload Calculation chart

Body extensions (dual slope):
  • Tail
  • Sideboards1

Body heat (exhaust)

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

Brake oil recirculating (custom)

Brakes, extended life disc

Display, external payload LED, LH/RH

Fuel tanks
  • 850 gal/3222 L
  • 1,000 gal/3785 L

Heater, fuel recirculation type, non-electric

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

Hub odometer – km (miles)


Oil Renewal System

Prelube system

Rim, spare for 37.0-R57 tire

Road Analysis Control (RAC)

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

Variable speed fan, Rockford

Vessels – EU

Wiggins (custom)

1 Increases capacity to 120 m3/157 yd3

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

3 Use with full liners when tail extension used

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