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789 Mining Truck

789 Mining Truck

At a Glance

Nominal Rated Payload
211 ton (US)
Rated Gross Machine Weight
715000 lb
Gross Power - SAE J1995
2100 HP
Engine Model
Cat® 3516E
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Caterpillar’s exclusive design ownership provides advantages by creating a total hauling unit that delivers the best integration of high production, availability, and payload in combination with low operating cost and long life. The new Cat® 789 continues the tradition of Caterpillar’s proven 789 Truck with high productivity and lowest in class cost per ton.

Weights - Approximate

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Nominal Rated Payload 211ton (US)
Rated Gross Machine Weight 715000lb
Chassis Weight 234003lb
Body Weight 59827lb
Note (1) Consult your tire manufacturer for maximum tire load.
Note (2) Chassis weight with full fuel and fluids, standard & mandatory attachments, hoist, body mounting group, rims, and tires.


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Gross Power - SAE J1995 2100HP
Engine Model Cat® 3516E
Net Power - SAE J1349 1975HP
Rated Speed 1650r/min
Emissions Rating U.S. Tier 4 / EU Stage V
Bore 6.7in
Stroke 8.5in
Displacement 4766in³
Note (1) Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator.

Weight Distributions - Approximate

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Front Axle - Empty 50%
Rear Axle - Empty 50%
Front Axle - Loaded 33%
Rear Axle - Loaded 67%

Final Drives

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Type Double reduction, planetary with full floating axles.
Differential Ratio 2.35:1
Planetary Ratio 10.83:1
Total Reduction Ratio 25.46:1


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Standard Tires 37.00-R51
Optional Tires 40.00-R51
Rims 29" x 57"
Note (1) Quick Change Rims optional.
Note (2) Caterpillar recommends the customer evaluate all job conditions and consult tire manufacturer for proper tire selection and TKPH (TMPH) capabilities.

Braking System

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Service Brakes Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area 12662in²
Rear - Wet Disc Brake Surface Area 20861in²
Standards Service and Secondary: ISO 3450:2011
Parking Brake Four-corner, Multi-disc, Spring Applied, Hydraulically Released

Capacity - Dual Slope - 100% Fill Factor

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Struck 101yd³
Heaped (SAE 2:1) 141yd³

Body Hoists

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Type Twin, two-stage hydraulic cylinders with snubbing valve.
Pump Flow - High Idle 106.5gal/min
Relief Valve Setting - Raise 2749psi
Body Raise Time - High Idle 14s
Body Lower Time - Float 16s


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Type Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
Effective Cylinder Stroke - Front 4.12in
Effective Cylinder Stroke - Rear 3.67in
Rear axle - Oscillation ±5°

Service Refill Capacities

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Fuel Tank - Standard 544gal (US)
Diesel Exhaust Fluid Tank 62gal (US)
Cooling System 180gal (US)
Crankcase 77gal (US)
Final Drive - Each 5.8gal (US)
Differential - Final Drives 161gal (US)
Steering Tank 42gal (US)
Steering System - Includes Tank 46gal (US)
Brake/Hoist Tank 169gal (US)
Brake Hoist System 347gal (US)
Brake Hoist System - Includes Tank 55gal (US)
Torque Converter - Transmission System - Including Sump 55gal (US)


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Air Conditioning HFC - 134A refrigerant: 31733 Btu/h
Heater / Defroster 36510Btu/h
Note The operator sound pressure level, 76 dB(A), complies with ISO 6394:2008 and ISO 6396:2008.
ROPS Standards (1) ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
FOPS Standards FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 for Operator and ISO 13459:2012 Level II for Trainer.


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Steering Angle 36.07°
Turning Diameter - Front 90.3ft
Steering Standards ISO 5010:2007

Dimensions (Approximate)

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Height - Top of ROPS 18.25ft
Overall Body Length 42ft
Inside Body Length 27.33ft
Overall Length 41.5ft
Wheel Base 18.67ft
Rear Axle - Tail 11.75ft
Ground Clearance 4.25ft
Dump Clearance 4.75ft
Loading Height - Empty 18.58ft
Rear Sidewall Height 3.17ft
Inside Body Depth - Maximum 9.33ft
Overall Height - Body Raised 44.08ft
Operating Width 25.67ft
Centerline Front Tire Width 17.75ft
Engine Guard Clearance 4.25ft
Overall Canopy Width 25.08ft
Outside Body Width 22.5ft
Inside Body Width 21.33ft
Front Canopy Height 21.42ft
Rear Axle - Clearance 4.17ft
Centerline of Rear Dual Tire Width 15.42ft
Overall Tire Width 23.33ft


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Forward - 1 7.8mile/h
Forward - 2 10.6mile/h
Forward - 3 14.4mile/h
Forward - 4 19.4mile/h
Forward - 5 26.3mile/h
Forward - 6 35.5mile/h
Reverse 7.3mile/h
Top Speed - Loaded 35.5mile/h