- Overall Length: 39.92 ft / 12177 mm
- Overall Width: 25.18 ft / 7674 mm
- Overall Height: 20.25 ft / 6182 mm
- Wheelbase: 18.68 ft / 5700 mm
Published dimensions and weight
Caterpillar 789C
Weighing roughly 317.5 t and rated at 1770.2 hp, the Caterpillar 789C is a rock truck in its size class.
01Published dimensions and weight
Dimensions reference
Representative category illustration; exact model may differ.Measurement reference — not to scale
01Dimensions referenceLength × width × height
02WeightNot publishedNot published
03Selected published values107
Rigid rock trucks are commonly used to haul rock and bulk material on mines, quarries and large earthmoving sites. Published rows for Caterpillar 789C include published payload of 390000 lb / 176901.04 kg, published engine power of 1900 hp / 1417 kw, published maximum speed of 32.7 mph / 52.6 km/h. These values describe the published configuration; verify the specific machine's configuration, attachments and records.
- Compare the published “Overall Length” field (39.92 ft / 12177 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Overall Width” field (25.18 ft / 7674 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Overall Height” field (20.25 ft / 6182 mm) with the specific machine's configuration and records; options and condition can differ.
02Specifications
Published values, clearly grouped.
Published specifications and measurements are organized by section for quick reference.
Dimensions
Overall Length39.92 ft12177 mm
Overall Width25.18 ft7674 mm
Overall Height20.25 ft6182 mm
Wheelbase18.68 ft5700 mm
Ground Clearance3.83 ft1173 mm
Dump Height39.25 ft11950 mm
Dump Ground Clearance4.37 ft1330 mm
Dump
Dump Angle49.5 degrees49.5 degrees
Load Capacity - Struck102 yd392 m3
Load Capacity - Heaped137.34 yd3105 m3
Rated Payload390000 lb176901.04 kg
Lower Time17.3 sec17.3 sec
Raise Time18.9 sec18.9 sec
Engine
Number Of Cylinders1616
Engine Make22362236
Engine Model3516B EUI3516B EUI
Gross Power1900 hp1417 kw
Net Power1770.2 hp1320 kw
Power Measured @1750 rpm1750 rpm
AspirationTurbochargedTurbocharged
Displacement4211 cu in69.1 L
Bore6.7 in170.2 mm
Stroke7.5 in190.5 mm
Net Power - Iso 92491791 hp1335.6 kw
Net Power - Sae J13491771 hp1320.7 kw
Net Power - 80/1269/Eec1791 hp1335.6 kw
Gross Power - Sae J19951900 hp1416.9 kw
Operational
Fuel Capacity851 gal3222 L
Cooling System Fluid Capacity175 gal663 L
Engine Oil Capacity20 gal76 L
Diff And Final Drive Fluid Capacity154 gal583 L
Steering System Fluid Capacity50 gal189 L
Brake/Hoist System Fluid Capacity240 gal909 L
Hydraulic System Fluid Capacity140 gal531 L
Operating Voltage24 V24 V
Alternator Supplied Amperage75 amps75 amps
Tire Size37.00-R57(E4)37.00-R57(E4)
Transmission
Transmission TypeSix-speed planetary power shift with direct injectionSix-speed planetary power shift with direct injection
Number Of Gears - Forward66
Number Of Gears - Reverse11
Max Speed32.7 mph52.6 km/h
Reverse6.5 mile/h6.5 mile/h
Forward - 17.2 mph11.6 km/h
Forward - 29.8 mph15.8 km/h
Forward - 313.2 mph21.3 km/h
Forward - 417.8 mph28.7 km/h
Forward - 524.2 mph39 km/h
Forward - 632.7 mph52.7 km/h
Steering
Steering StandardsSAE J1511 OCT90 ISO 5010:1992SAE J1511 OCT90 ISO 5010:1992
Weights
Empty Weight299100.8 lb135670 kg
Loaded Weight700000 lb317515 kg
Weight Distribution Front - Empty47 %47 %
Weight Distribution Rear - Empty53 %53 %
Weight Distribution Front - Loaded33 %33 %
Weight Distribution Rear - Loaded67 %67 %
Tires
Standard Tires37.00-R57 (E4)37.00-R57 (E4)
Brakes
Brake Surface - Front12662 in28.2 m2
Brake Surface - Rear18024 in211.7 m2
StandardsSAE J1473 OCT90 ISO 3450:1996SAE J1473 OCT90 ISO 3450:1996
Body Hoists
Pump Flow - High Idle193 gal/min193 gal/min
Relief Valve Setting - Raise2500 psi2500 psi
Body Raise Time - High Idle18.9 s18.9 s
Body Lower Time - Float17.3 s17.3 s
Body Power Down - High Idle15.6 s15.6 s
Final Drives
Planetary Ratio10.83:110.83:1
Differential Ratio2.35:12.35:1
Total Reduction Ratio25.46:125.46:1
Operating Specifications
Top Speed - Loaded32.7 mph52.7 km/h
Steer Angle36 degrees36 degrees
Body Capacity - Sae 2:1137 yd3104.8 m3
Turning Diameter - Front90.2 ft27.5 m
Nominal Payload Capacity390000 lb176900.9 kg
Turning Circle - Clearance Diameter99.2 ft30.3 m
Service Refill Capacities
Cooling System175 gal662.5 L
Differential - Final Drives154 gal583 L
Steering Tank34 gal128.8 L
Steering System - Including Tank50 gal189.3 L
Brake Hoist System - Includes Tank240 gal908.5 L
Crankcase77 gal291.5 L
Brake/Hoist Hydraulic Tank140 gal530 L
Torque Converter/Transmission System - Including Sump20 gal75.8 L
Fuel Tank - Standard851 gal3221.4 L
Torque Converter - Transmission Sump59 gal223.4 L
Weight Distributions - Approximate
Front Axle - Empty47 %47 %
Front Axle - Loaded33 %33 %
Rear Axle - Empty53 %53 %
Rear Axle - Loaded67 %67 %
Weights - Approximate
Chassis Weight218300 lb99019.3 kg
Gross Machine Operating Weight700000 lb317514.7 kg
Body Weight Range26 800-29 950 kg (59,000-71,500 lb)26 800-29 950 kg (59,000-71,500 lb)
Capacity - Dual Slope - 100% Fill Factor
Struck96 yd373.4 m3
Heaped (Sae 2:1)137 yd3104.8 m3
Capacity - Flat Floor - 100% Fill Factor
Struck102 yd378 m3
Heaped (Sae 2:1)158 yd3120.8 m3
Suspension
Effective Cylinder Stroke - Front4 in101.6 mm
Effective Cylinder Stroke - Rear3.5 in88.9 mm
Approximate Weights - Dual Slope
Body59625 lb27045.5 kg
Chassis225500 lb102285.1 kg
Gross Weight - Empty310525 lb140851.8 kg
Full Liner20840 lb9452.9 kg
Tail Extension1700 lb771.2 kg
Side Boards2860 lb1297.3 kg
Approximate Weights - Flat Floor
Body66200 lb30027.9 kg
Chassis225400 lb102239.8 kg
Gross Weight - Empty299100 lb135669.5 kg
Grid Liner3300 lb1496.9 kg
Rear - Third Liner4200 lb1905.1 kg
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Manufacturer-published specifications.