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336 Excavator

  • Specs Summary

789D Mining Truck

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.

Standard Equipment


  • Diesel engine/turbocharged/aftercooled: <br>–Ground level engine shutdown<br>–Ether starting aid (automatic<br>– Aftercooler (separate circuit or air to air)<br>– Elevated low idle control<br>– Automatic starter protection<br>– Multi-point all pressure sensing
  • Braking system: <br>–Brake release motor (towing)<br>– Oil-cooled, multi-disc (front and rear)<br>– (service retarding, parking, secondary)<br>– Automatic Retarder Control<br>– Engine overspeed protection<br>– Extended life brake disc material
  • Transmission: <br>– 6-speed, automatic powershift with electronic control (TCC)<br>– Controlled throttle shifting; Individual clutch modulation<br>– Body-up shift inhibitor<br>– Directional shift management<br>– Downshift/reverse shift inhibitor<br>– Oil level sensor<br>– Neutral start switch/coast inhibitor<br>– Body-up reverse neutralizer<br>– Programmable top gear<br>– Lock-up torque converter<br>– 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: <br>– Backup and hazard lights; Auxiliary work lights (2) rear, (1) RH side, (1) LH side; Directional signals (front and rear LED)<br>– Engine compartment lights<br>– External payload lights<br>– Headlights with lo-hi beam selector<br>– Ladder light and service deck lights<br>– Left-hand ladder/service deck<br>– Stop/tail lights (LED)<br>– VIMS, blue light (LED)


  • STANDARD CAB: <br>– Operator seat<br>–Non-suspension trainer seat<br>– Flip down front visor<br>– Standard side of cab access
  • DELUXE CAB: <br>– Heated and ventilated operator seat<br>– Suspension trainer seat<br>– Retractable front visor<br>– Rear of cab access and standard side of cab access<br>– Vacuum, cab clean-out<br>– Operator Footrest
  • DELUXE COLD WEATHER CAB: <br>– Heated and ventilated operator seat<br>– Suspension trainer seat<br>– Retractable front visor<br>– Rear of cab access and standard side of cab access<br>– Vacuum<br>–cab clean-out<br>–Operator Footrest<br>– 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

Optional Equipment


  • Dual slope body: Body, dual slope, 109 m3 (142 yd3)
  • Dual slope body attachments: <br>– Extensions, 457 mm (18"), side, DS, 123 m3 (161 yd3)<br>– Extension, wraparound tail, DS<br>– Liner, entire body, DS<br>– Liner, wraparound, DS, 450 BHN<br>– 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: <br>– Extensions, side, MSD II, 141 m3 (185 yd3)<br>– 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: <br>– Directional signals (LED)<br>– 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:<br>– Service, 3516B, standard volume<br>– Service, 3516B, large volume<br>– Service, 3516C, standard volume<br>– Service, 3516C, large volume<br>– Service, engine oil, standard
  • Miscellaneous:<br>– Fire extinguisher, portable<br>– Hub odometer, kilometers<br>– Wheel chocks<br>– Gauge, brake wear indicator


  • Coolant, -50° C (-58° F)