Overview
The Caterpillar 785D 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 500.1 gal and hydraulic capacity of 89.1 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 785D Rock Truck against similar articulated dump truck models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Net Power
1,290.10
hp
Gross Power
1,450
hp
Rated Payload
300,000
lb
Overall Length
37.89
ft
Full Specifications
89 specs
Dimensions
Dump Ground Clearance
3.94 ft / 1.20 m
Dump Height
38.75 ft / 11.81 m
Ground Clearance
3.24 ft / 0.99 m
Load Capacity - Heaped
102 lb / 46 kg
Overall Height
16.81 ft / 5.12 m
Overall Length
37.89 ft / 11.55 m
Overall Width
21.79 ft / 6.64 m
Rated Payload
300,000 lb / 136,078 kg
Wheelbase
17 ft / 5.18 m
Engine
6.8 mile/h
1
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
169.40 gal / 641.2 L
Cooling System Fluid Capacity
100.20 gal / 379.3 L
Diff And Final Drive Fluid Capacity
115.20 gal / 436.1 L
Differential Ratio
2.10
Displacement
3,574 cu in / 58.6 L
Empty Weight
259,257 lb / 117,597 kg
Engine Make
2236
Engine Model
3512C HD
Engine Oil Capacity
53.90 gal / 204.0 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
Fuel Capacity
500.10 gal / 1,893.1 L
Gross Power
1,450 hp / 1,081.3 kW
Gross Power - Sae J1995
1,450 hp / 1,081.3 kW
Hydraulic System Fluid Capacity
89.10 gal / 337.3 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
Planetary Ratio
10.83
Power Measured @
1,750 rpm
Pump Flow - High Idle
198 gal/min / 749.5 L/min
Rated Power
1,450 hp / 1,081.3 kW
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
8.40 in / 213 mm
Torque Rise
23 lb-ft / 31 Nm
Total Reduction Ratio
22.75
Weight Distribution Front - Empty
46 lb / 21 kg
Weight Distribution Front - Loaded
33 lb / 15 kg
Weight Distribution Rear - Empty
55 lb / 25 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
108.90 ft / 33.19 m
Maximum Target Payload
314,000 lb / 142,428 kg
Minimum Target Payload
288,000 lb / 130,635 kg
Steer Angle
36 deg
Target Payload - Dual Slope*
292,000 lb / 132,449 kg
Top Speed - Loaded
34 lb / 15 kg
Turning Diameter - Front
97.70 in / 2,482 mm
Body Weight
49,150 lb / 22,294 kg
Brake Hoist System - Includes Tank
169 gal / 639.7 L
Brake/Hoist Hydraulic Tank
89 gal / 336.9 L
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
Front Axle - Empty*
45 lb / 20 kg
Front Axle - Loaded - Target
33 lb / 15 kg
Fuel Tank - Standard
500 gal / 1,892.7 L
Gross Machine Operating Weight (Gmw)
550,000 lb / 249,476 kg
Load Capacity - Heaped
102.10 yd³ / 78.06 m³
Net Power
1,290 hp / 962.0 kW
Rear Axle - Empty*
54 lb / 24 kg
Rear Axle - Loaded - Target
67 lb / 30 kg
Rops Standards
1,040
Sound Standards
1,166
Steering System - Including Tank
31 gal / 117.3 L
Steering Tank
24 gal / 90.8 L
Torque Converter/Transmission System - Including Sump
66 lb-ft / 89 Nm
Related Machines
Frequently Asked Questions
How powerful is the Caterpillar 785D Rock Truck engine? +
The Caterpillar 785D Rock Truck produces 1,450 hp (1,081.3 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 785D Rock Truck compare to similar Articulated Dump Truck models? +
You can compare the Caterpillar 785D 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.