Overview
The Caterpillar 785C Rock Truck is a articulated dump truck listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include engine power of 1,348 hp, travel speed of 34.0 mph, fuel capacity of 500.0 gal and hydraulic capacity of 169.4 gal. This model can be reviewed for equipment comparison, jobsite planning, fleet research, and specification-based machine selection. Use the full specifications table to compare the Caterpillar 785C Rock Truck against similar articulated dump truck models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Net Power
1,445.70
hp
Gross Power
1,451
hp
Rated Payload
300,000
lb
Overall Length
36.25
ft
Full Specifications
99 specs
Dimensions
Dump Angle
49 deg
Dump Ground Clearance
4.21 ft / 1.28 m
Dump Height
36.83 ft / 11.23 m
Ground Clearance
3.24 ft / 0.99 m
Load Capacity - Heaped
119 lb / 54 kg
Load Capacity - Struck
96 lb / 44 kg
Overall Height
19 ft / 5.79 m
Overall Length
36.25 ft / 11.05 m
Overall Width
20.60 ft / 6.28 m
Rated Payload
300,000 lb / 136,078 kg
Wheelbase
17 ft / 5.18 m
Engine
6.8 mile/h
1
Alternator Supplied Amperage
75 A
Body Power Down - High Idle
15.90
Bore
6.70 in / 170 mm
Brake Surface - Front
9,497
Brake Surface - Rear
13,908
Brake/Hoist System Fluid Capacity
89 gal / 336.9 L
Cooling System Fluid Capacity
100 gal / 378.5 L
Diff And Final Drive Fluid Capacity
115 gal / 435.3 L
Differential Ratio
2.10
Displacement
3,158 cu in / 51.8 L
Empty Weight
225,200 lb / 102,149 kg
Engine Make
2236
Engine Model
3512B-EUI
Engine Oil Capacity
24 gal / 90.8 L
Forward - 1
7.50 mph / 12.1 km/h
Forward - 2
10.20 mph / 16.4 km/h
Forward - 3
13.80 mph / 22.2 km/h
Forward - 4
18.60 mph / 29.9 km/h
Forward - 5
25.20 mph / 40.6 km/h
Forward - 6
34 mph / 54.7 km/h
Front Axle - Empty
47 lb / 21 kg
Front Axle - Loaded
33 lb / 15 kg
Fuel Capacity
500 gal / 1,892.7 L
Gross Power
1,451 hp / 1,082.0 kW
Gross Power - Sae J1995
1,450 hp / 1,081.3 kW
Hydraulic System Fluid Capacity
169.40 gal / 641.2 L
Loaded Weight
550,000 lb / 249,476 kg
Max Speed
34 mph / 54.7 km/h
Net Power
1,348 hp / 1,005.2 kW
Net Power - 80/1269/Eec
1,348 hp / 1,005.2 kW
Net Power - Cat
1,348 hp / 1,005.2 kW
Net Power - Iso 9249
1,348 hp / 1,005.2 kW
Net Power - Sae J1349
1,348 hp / 1,005.2 kW
Number Of Gears - Forward
6
Number Of Gears - Reverse
1
Number of Cylinders
16
Operating Voltage
24 V
Planetary Ratio
10.83
Power Measured @
1,750 rpm
Pump Flow - High Idle
198 gal/min / 749.5 L/min
Rear Axle - Empty
53 lb / 24 kg
Rear Axle - Loaded
67 lb / 30 kg
Relief Valve Setting - Raise
2,500 psi / 172.4 bar
Reverse
6.80
Standards
1,473
Steering Standards
1,511
Steering System Fluid Capacity
31 gal / 117.3 L
Stroke
7.50 in / 191 mm
Torque Rise
23 lb-ft / 31 Nm
Total Reduction Ratio
22.75
Weight Distribution Front - Empty
47 lb / 21 kg
Weight Distribution Front - Loaded
33 lb / 15 kg
Weight Distribution Rear - Empty
53 lb / 24 kg
Weight Distribution Rear - Loaded
67 lb / 30 kg
Hydraulics
Heaped (Sae 2:1)
102
Lower Time
15.90 sec
Raise Time
15.20 sec
Other
Machine Clearance Turning Diameter
100.40 ft / 30.60 m
Nominal Payload Capacity
300,000 lb / 136,078 kg
Sae (2:1) Capacity
102
Steer Angle
36 deg
Top Speed - Loaded
34 lb / 15 kg
Turning Diameter - Front
90.20 in / 2,291 mm
Body
46,865
Brake Hoist System - Includes Tank
169 gal / 639.7 L
Brake/Hoist Hydraulic Tank
89 gal / 336.9 L
Chassis
164,134
Chassis Weight
164,134 lb / 74,450 kg
Cooling System
100 gal / 378.5 L
Crankcase
54 gal / 204.4 L
Differential - Final Drives
115
Effective Cylinder Stroke - Front
12.10 in / 307 mm
Effective Cylinder Stroke - Rear
6.50 in / 165 mm
Fuel Tank - Standard
500 gal / 1,892.7 L
Gross Machine Operating Weight
550,000 lb / 249,476 kg
Gross Weight - Empty
211,035 lb / 95,724 kg
Load Capacity - Heaped
94.50 yd³ / 72.25 m³
Net Power
1,446 hp / 1,078.1 kW
Operating Weight - Empty - Dual-Slope Body
211,035 lb / 95,724 kg
Operating Weight - Empty - Flat Floor Body
225,200 lb / 102,149 kg
Rops Standards
1,040
Sound Standards
1,166
Standard Liner
4,400
Steering System - Including Tank
31 gal / 117.3 L
Steering Tank
24 gal / 90.8 L
Struck
74
Torque Converter/Transmission System - Including Sump
66 lb-ft / 89 Nm
Related Machines
Frequently Asked Questions
How powerful is the Caterpillar 785C Rock Truck engine? +
The Caterpillar 785C Rock Truck produces 1,451 hp (1,082.0 kW) of engine power. This output is typical for its weight class and designed to handle demanding Articulated Dump Truck work cycles efficiently.
How does the Caterpillar 785C Rock Truck compare to similar Articulated Dump Truck models? +
You can compare the Caterpillar 785C Rock Truck side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.