789D Mining Truck

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What will it take to boost your bottom line? A truck with a tradition of proven performance in a wide variety of applications? A truck with the lowest cost per ton in its size class, for an overall reduction in your operating costs? The reliability and reduced costs that come with long life — from the engine and powertrain to the components, brakes and frame? With the Cat® 789D, you get all of this — and more. The 789D offers the lowest cost per ton in its size class and high reliability — reducing overall costs and delivering a better bottom line to the most important mine in the world: yours.


Engine Model 3516C - HD 3516C - HD Less
Gross Power - SAE J1995 2100.0 HP 1566.0 kW Less
Bore 6.7 in 170.0 mm Less
Stroke 8.3 in 210.0 mm Less
Displacement 4766.0 in³ 78.1 l Less
Net Power 1969.0 HP 1468.0 kW Less
Gross Power 2100.0 HP 1566.0 kW Less
Rated Net Power - ISO 9249 1969.0 HP 1468.0 kW Less

Optional Engine

Stroke 7.5 in 190.0 mm Less
Gross Power 1900.0 HP 1417.0 kW Less
Displacement 4211.0 in³ 69.0 l Less
Rated Net Power - ISO 9249 1791.0 HP 1335.0 kW Less
Engine Model 3516B EUI 3516B EUI Less
Bore 6.7 in 170.0 mm Less

Weights - Approximate

Gross Machine Operating Weight (GMW) 715000.0 lb 324319.0 kg Less
Empty Operating Chassis Weight (EOCW) 218542.0 lb 99129.0 kg Less
Body Weight Range 23 920 kg-45 547 kg (52,850 lb-100,414 lb) 23 920 kg-45 547 kg (52,850 lb-100,414 lb) Less

Operating Specifications

Nominal Payload Capacity 200.0 ton (US) 181.0 t Less
Standard MSD Body (SAE 2:1) 170.0 yd³ 130.0 m³ Less
Standard Combi Body (SAE 2:1) 200.0 yd³ 153.0 m³ Less
Standard Gateless Coal Body (SAE 2:1) 250.0 yd³ 191.0 m³ Less
Standard Dual Slope Body (SAE 2:1) 141.0 yd³ 108.0 m³ Less
Standard X Body (SAE 2:1) 161.0 yd³ 123.0 m³ 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 7.8 mile/h 12.6 km/h Less
Forward - 2 10.6 mile/h 17.1 km/h Less
Forward - 3 14.4 mile/h 23.1 km/h Less
Forward - 4 19.4 mile/h 31.2 km/h Less
Forward - 5 26.3 mile/h 42.3 km/h Less
Forward - 6 35.5 mile/h 57.2 km/h Less
Reverse 7.3 mile/h 11.8 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


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

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 s 18.9 s Less
High Idle Body Lower Time - Power 15.6 s 15.6 s Less
High Idle Body Lower Time - Float 17.3 s 17.3 s Less

Weight Distributions - Approximate

Front Axle - Loaded 33.0 % 33.0 % Less
Rear Axle - Loaded 67.0 % 67.0 % Less
Rear Axle - Empty 54.0 % 54.0 % Less
Front Axle - Empty 46.0 % 46.0 % Less


Optional Tires 40.00-R57 40.00-R57 Less
Standard Tires 37.00-R57 37.00-R57 Less

Service Refill Capacities

Fuel Tank - Optional 1000.0 gal (US) 3785.0 l Less
Transmission Tank 20.0 gal (US) 76.0 l Less
Crankcase 77.0 gal (US) 291.0 l Less
Differential - Final Drives 154.0 gal (US) 583.0 l Less
Fuel Tank - Standard 550.0 gal (US) 2082.0 l Less
Brake Hoist System 241.0 gal (US) 909.0 l Less
Steering System 50.0 gal (US) 189.0 l Less
Cooling System 192.0 gal (US) 725.0 l Less


ROPS Standards Standards Standards Less


Sound Standards Standards Standards Less


Vehicle Clearance - Turn Circle 99.18 ft 30.23 m Less
Steering Angle 36.07 ° 36.07 ° Less
Turning Diameter - Front Wheel 90.32 ft 27.53 m Less
Steering Standards SAE J1511 OCT90 ISO 5010:1992 SAE J1511 OCT90 ISO 5010:1992 Less

Power Train - Engine

Power Train - Transmission

Engine/Power Train Integration


Operator's Station

Cat® Brake System

Truck Body Systems

Monitoring System




Customer Support

789D Standard Equipment

  • Diesel engine/turbocharged/aftercooled: Ground level engine shutdown; Ether starting aid (automatic); Aftercooler (separate circuit or air to air); Elevated low idle control; Automatic starter protection; Multi-point all pressure sensing
  • Braking system: Brake release motor (towing); Oil-cooled, multi-disc (front and rear); (service retarding, parking, secondary); Automatic Retarder Control; Engine overspeed protection; Extended life brake disc material
  • Transmission: 6-speed, automatic powershift with electronic control (TCC); Controlled throttle shifting; Individual clutch modulation; Body-up shift inhibitor; Directional shift management; Downshift/reverse shift inhibitor; Oil level sensor; Neutral start switch/coast inhibitor; Body-up reverse neutralizer; Programmable top gear; Lock-up torque converter; Rear axle continuous lubrication/filtration

  • Alarm, backup
  • Alternator, 105 amp
  • Batteries, 12V (2), 93 amp-hour
  • Converter, 12V electrical
  • Electrical system, 24V, 15 amp
  • Lighting system: Backup and hazard lights; Auxiliary work lights (2) rear, (1) RH side, (1) LH side; Directional signals (front and rear LED); Engine compartment lights; External payload lights; Headlights with lo-hi beam selector; Ladder light and service deck lights; Left-hand ladder/service deck; Stop/tail lights (LED); VIMS, blue light (LED)

  • STANDARD CAB: Operator seat, Non-suspension trainer seat, Flip down front visor, Standard side of cab access
  • DELUXE CAB: Heated and ventilated operator seat, Suspension trainer seat, Retractable front visor, Rear of cab access and standard side of cab access, Vacuum, cab clean-out, Operator Footrest
  • DELUXE COLD WEATHER CAB: Heated and ventilated operator seat, Suspension trainer seat, Retractable front visor, Rear of cab access and standard side of cab access, Vacuum, cab clean-out, Operator Footrest, Deluxe Diffuser
  • Air conditioner
  • Auxiliary power connection/cigarette lighter
  • Diagnostic connection port
  • Dome courtesy light
  • Entertainment Radio Ready: 5 amp converter, Speakers, Antenna wiring
  • Gauges/indicators: Air cleaner service indicator; Quad gauge panel: Air pressure, Brake oil temperature, Engine coolant temperature, Fuel level
  • Electric hour meter
  • Electric engine control fault indicator
  • Engine idle shutdown
  • Mirrors, right and left
  • Speedometer
  • Tachometer
  • Transmission gear indicator
  • VIMS message center with universal gauge
  • VIMS keypad
  • Heater/defroster (11 070 kCal/43,930 BTU)
  • Horn
  • Hoist, body control (electric)
  • Integrated object detection system
  • ROPS cab, insulated/sound suppressed
  • Seatbelt, operator, 75 mm/3" wide
  • Seatbelt, trainer, two points
  • Stairway and walkway access, 600 mm (24 in)
  • Steering wheel, tilt, padded, telescopic
  • Window, operator, electric powered
  • Windshield wiper, intermittent control and washer

  • Extended Life Coolant to -35° C (-30° F)

  • Air line dryer
  • Auto lubrication system
  • Auxiliary “buddy” dumping quick connect
  • Auxiliary steering quick connect (towing)
  • Body mounting group
  • Center mounted rims (6) (29×57) (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)
  • Tie off points
  • Tow hooks (front)
  • Tow pin (rear)
  • Traction Control System
  • Vital Information Management System

789D Optional Equipment

  • Dual slope body: Body, dual slope, 109 m3 (142 yd3)
  • Dual slope body attachments: Extensions, 457 mm (18"), side, DS, 123 m3 (161 yd3); Extension, wraparound tail, DS; Liner, entire body, DS; Liner, wraparound, DS, 450 BHN; Rock deflector, rear tire, DS
  • X body: Body, X, 123 m3 (161 yd3)
  • X body attachments: Extensions, side, X, 185 mm (7"), 131 m3 (171 yd3); Extensions, side, X, 385 mm (15"), 138 m3 (181 yd3)
  • MSD II body: Body, MSD II, 130 m3 (170 yd3)
  • MSD II body attachments: Extensions, side, MSD II, 141 m3 (185 yd3); Extensions, side, MSD II, 153 m3 (200 yd3)
  • Combination body: Body, combi, 153 m3 (200 yd3)
  • Combination body attachments: Extensions, side, combi, 195 m3 (255 yd3)
  • Gateless coal body: Body, gateless coal, 191 m3 (250 yd3)
  • Gateless coal body attachments: Extensions, side, coal, 214 m3 (280 yd3); Extensions, side, coal, 237 m3 (310 yd3)
  • Body lighting group - rear: Directional signals (LED), Stop/tail lights (LED)

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

  • Prelube, engine
  • Oil renewal system

  • Rear axle, cooler

  • Information management: Control, road analysis (RAC)
  • Cold weather: Brake oil, recirculating; Cold weather start
  • Service center: Service, 3516B, standard volume; Service, 3516B, large volume; Service, 3516C, standard volume; Service, 3516C, large volume; Service, engine oil, standard
  • Miscellaneous: Fire extinguisher, portable; Hub odometer, kilometers; Wheel chocks; Gauge, brake wear indicator

  • Coolant, -50° C (-58° F)

Swear by Equipment Management

Fuel costs. Labor costs. Maintenance costs. They can all tax your patience. But with timely, accurate data, you can better manage your equipment to keep operating expenses in line. Cat® EMSolutions offers everything you need to control costs, help your guys work better, reduce risks and get more done every day.

See How