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Caterpillar 789C Off-Highway Truck

Approximate Weights - Dual Slope

Body59625 lbs
Chassis225500 lbs
Gross Weight - Empty310525 lbs

Approximate Weights - Flat Floor

Body66200 lbs
Chassis225400 lbs


Articulating/Rigid Rigid

Body Hoists

Body Lower Time - Float17.3 seconds
Body Power Down - High Idle15.6 seconds
Body Raise Time - High Idle18.9 seconds
Pump Flow - High Idle193 gpm
Relief Valve Setting - Lower96 psi
Relief Valve Setting - Raise2500 psi


Brake Surface - Front12662 cu in
Brake Surface - Rear18024 cu in
StandardsSAE J1473 OCT90 ISO 3450:1996

Capacity - Dual Slope - 100% Fill Factor

Heaped (SAE 2:1)137 cu yd
Heaped 2:1 (SAE)102 cu yd
Struck96 cu yd

Capacity - Flat Floor - 100% Fill Factor

Struck102 cu yd


Dump Ground Clearance4.4 ft
Dump Height39.3 ft
Ground Clearance3.9 ft
Overall Height20.3 ft
Overall Length40 ft
Overall Width25.2 ft
Wheelbase18.7 ft


Drive Config 4x2


Dump Angle49.5 deg
Load Capacity - heaped137.4 cu yd
Load Capacity - Struck102 cu yd
Lower Time17.3 seconds
Raise Time18.9 seconds
Rated Payload390000 lbs


Bore6.7 in
Displacement4211 cu in
Engine ModelCat 3516B EUI
Gross Power1900 hp
Gross Power - SAE J19951900 hp
Net Power1770.2 hp
Net Power - 80/1269/EEC1791 hp
Net Power - ISO 92491791 hp
Net Power - SAE J13491771 hp
Number of Cylinders16
Power Measured @1750 rpm
Rated Engine Speed140 rpm
Stroke7.5 in
Torque Measured @Turbocharged rpm
Torque Rise15.6

Final Drives

Differential Ratio2.35:1
Planetary Ratio10.83:1
Total Reduction Ratio25.46:1

Operating Specifications

Alternator Supplied Amperage75 amps
Body Capacity - SAE 2:1137 cu yd
Brake/Hoist System Fluid Capacity240 gal
Cooling System Fluid Capacity175 gal
Diff and Final Drive Fluid Capacity154 gal
Engine Oil Capacity20 gal
Fuel Capacity851 gal
Hydraulic System Fluid Capacity140 gal
Nominal Payload Capacity390000 lbs
Operating Voltage24 volts
Steer Angle36 deg
Steering System Fluid Capacity50 gal
Tire Size37.00-R57(E4)
Top Speed - Loaded32.7 mph
Turning Circle - Clearance Diameter99.2 ft
Turning Diameter - Front99.2 ft


ROPS/FOPS Standards59625

Service Refill Capacities

Brake / Hoist / Fan Hydraulic Tank137 gal
Brake Hoist System - Includes Tank240 gal
Brake/Hoist Hydraulic Tank140 gal
Cooling System175 gal
Crankcase77 gal
Differential - Final Drives154 gal
Fuel Tank - Optional26800 - 29,950 kg -
Fuel Tank - Standard851 gal
Steering System - Including Tank50 gal
Steering Tank34 gal
Torque Converter - Transmission Sump59 gal
Torque Converter/Transmission System - Including Sump20 gal

Steering System

Steering StandardsSAE J1511 OCT90 ISO 5010:1992


Effective Cylinder Stroke - Front4 in
Effective Cylinder Stroke - Rear3.5 in
Rear axle - Oscillation4 deg


Standard Tires37.00-R57 (E4)


Forward - 17.2 mph
Forward - 29.8 mph
Forward - 313.2 mph
Forward - 417.8 mph
Forward - 524.2 mph
Forward - 632.7 mph
Max Speed32.7 mph
Number of Gears - Forward6
Number of Gears - Reverse1
Reverse6.5 mph
Transmission TypeSix-speed planetary power shift with direct injection


Body Weight225500 lbs
Body Weight Range26 800-29 950 kg (59,000-71,500 lb)
Chassis Weight218300 lbs
Empty Weight299100.8 lbs
Front Axle - Empty47%
Front Axle - Loaded33%
Loaded Weight700000 lbs
Operating Weight - LoadedSAE J1511 OCT90 ISO 5010:1992 lbs
Rear Axle - Empty53%
Rear Axle - Loaded67%
Weight Distribution Front - empty47%
Weight Distribution Front - loaded33%
Weight Distribution Rear - empty53%
Weight Distribution Rear - loaded67%

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39.04690 \\ -77.49030 \\ Ashburn \\ PA