Overview
The Caterpillar 777D 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 938 hp, travel speed of 37.6 mph, fuel capacity of 300.4 gal and hydraulic capacity of 36.5 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 777D Rock Truck against similar articulated dump truck models by power, weight, capacity, dimensions, speed, and other technical values.
Key Specifications
Net Power
943
hp
Gross Power
1,000
hp
Rated Payload
200,000
lb
Overall Length
32.10
ft
Full Specifications
120 specs
Dimensions
Centerline Front Tire Width
13.69 ft / 4.17 m
Centerline Of Rear Dual Tire Width
11.75 ft / 3.58 m
Dump Ground Clearance
2.87 ft / 0.87 m
Dump Height
32.71 ft / 9.97 m
Engine Guard Clearance
2.33 ft / 0.71 m
Front Canopy Height
16.61 ft / 5.06 m
Ground Clearance
2.46 ft / 0.75 m
Height - Top Of Rops
14.80 ft / 4.51 m
Inside Body Depth - Maximum
6.30 ft / 1.92 m
Inside Body Length
23.73 ft / 7.23 m
Inside Body Width
17.06 ft / 5.20 m
Load Capacity - Heaped
79 lb / 36 kg
Load Capacity - Struck
55 lb / 25 kg
Loading Height - Empty
14.37 ft / 4.38 m
Operating Width
20.03 ft / 6.11 m
Outside Body Width
18.12 ft / 5.52 m
Overall Body Length
31.30 ft / 9.54 m
Overall Canopy Width
19.11 ft / 5.82 m
Overall Height
16.41 ft / 5.00 m
Overall Height - Body Raised
33 ft / 10.06 m
Overall Length
32.10 ft / 9.78 m
Overall Tire Width
17.27 ft / 5.26 m
Overall Width
20.02 ft / 6.10 m
Rated Payload
200,000 lb / 90,718 kg
Rear Axle - Clearance
2.50 ft / 0.76 m
Rear Axle - Tail
9 lb / 4 kg
Wheel Base
14.99 in / 381 mm
Wheelbase
15 ft / 4.57 m
Engine
7.4 mile/h
1
Body Power Down - High Idle
13
Bore
6.70 in / 170 mm
Brake Surface - Front
432
Brake Surface - Rear
15,828
Brake/Hoist System Fluid Capacity
109.70 gal / 415.3 L
Cooling System Fluid Capacity
85.90 gal / 325.2 L
Diff And Final Drive Fluid Capacity
87 gal / 329.3 L
Differential Ratio
2.74
Displacement
2,105 cu in / 34.5 L
Empty Weight
155,000 lb / 70,307 kg
Engine Make
2236
Engine Model
3508A
Engine Oil Capacity
32.80 gal / 124.2 L
Flywheel Power
938 hp / 699.5 kW
Forward - 1
6.50 mph / 10.5 km/h
Forward - 2
8.90 mph / 14.3 km/h
Forward - 3
12 mph / 19.3 km/h
Forward - 4
16.20 mph / 26.1 km/h
Forward - 5
21.90 mph / 35.2 km/h
Forward - 6
29.40 mph / 47.3 km/h
Forward - 7
39.90 mph / 64.2 km/h
Front Axle - Empty
47 lb / 21 kg
Front Axle - Loaded
33 lb / 15 kg
Fuel Capacity
300.40 gal / 1,137.1 L
Fuel Tank
300 gal / 1,135.6 L
Gross Power
1,000 hp / 745.7 kW
Gross Power - Sae J1995
1,000 hp / 745.7 kW
Hydraulic System Fluid Capacity
36.50 gal / 138.2 L
Loaded Weight
355,011 lb / 161,030 kg
Max Speed
37.60 mph / 60.5 km/h
Max Torque
3,476 lb-ft / 4,713 Nm
Net Power
938 hp / 699.5 kW
Net Power - 80/1269/Eec
938 hp / 699.5 kW
Net Power - Cat
938 hp / 699.5 kW
Net Power - Iso 9249
938 hp / 699.5 kW
Net Power - Sae J1349
938 hp / 699.5 kW
Number Of Gears - Forward
7
Number Of Gears - Reverse
1
Number of Cylinders
8
Planetary Ratio
7
Pump Flow - High Idle
119 gal/min / 450.5 L/min
Rated Engine Speed
1,750 rpm
Rear Axle - Empty
53 lb / 24 kg
Rear Axle - Loaded
67 lb / 30 kg
Relief Valve Setting - Lower
3,450 psi / 237.9 bar
Relief Valve Setting - Raise
2,750 psi / 189.6 bar
Reverse
7.40
Steering Standards
1,511
Steering System Fluid Capacity
22.20 gal / 84.0 L
Stroke
7.50 in / 191 mm
Torque Measured @
1,300 rpm
Torque Rise
23 lb-ft / 31 Nm
Total Reduction Ratio
19.16
Weight Distribution Front - Empty
45 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
Brake Standards
3,450
Raise Time
15 sec
Other
Body Capacity - Sae 2:1
78.60
Body Capacity - Struck
55.10
Circle Clearance Diameter
85.50 ft / 26.06 m
Dump Clearance
3.10 ft / 0.94 m
Maximum Capacity
178,920
Nominal Payload Class (100%)
178,920 lb / 81,157 kg
Steer Angle
31.80 deg
Top Speed - Loaded
40 lb / 18 kg
Body
34,785
Body Weight
34,800 lb / 15,785 kg
Brake Hoist System - Includes Tank
109.70 gal / 415.3 L
Chassis
106,964
Chassis Weight
107,100 lb / 48,580 kg
Cooling System
86 gal / 325.5 L
Differential - Final Drives
87
Effective Cylinder Stroke - Front
12.50 in / 318 mm
Effective Cylinder Stroke - Rear
6.50 in / 165 mm
Heaped 2:1 (Sae)
78.60
Load Capacity - Heaped
74.60 yd³ / 57.04 m³
Net Power
943 hp / 703.2 kW
Operating Weight - Empty
141,749 lb / 64,296 kg
Operating Weight - Loaded
355,000 lb / 161,025 kg
Rear Axle - Oscillation
5 lb / 2 kg
Rops/Fops Standards
1,040
Sound Standards
1,166
Steering System - Including Tank
22 gal / 83.3 L
Steering Tank
15 gal / 56.8 L
Struck
55
Target Gross Machine Operating Weight
360,000 lb / 163,293 kg
Torque Converter - Brake - Hoist Hydraulic Tank
66 gal / 249.8 L
Torque Converter - Brake - Hoist System - Including Tank
133 gal / 503.5 L
Torque Converter - Transmission System - Including Sump
37 lb-ft / 49 Nm
Related Machines
Frequently Asked Questions
How powerful is the Caterpillar 777D Rock Truck engine? +
The Caterpillar 777D Rock Truck produces 1,000 hp (745.7 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 777D Rock Truck compare to similar Articulated Dump Truck models? +
You can compare the Caterpillar 777D 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.