777G Off-Highway Truck

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G Series represents a new era for this size class from Caterpillar. With your input, we have designed and manufactured a truck that is reliable, economical and offers comfort, confidence, and control for your operators. Your long-term success is our goal and with G Series trucks, we’re on the right road.

Operating Specifications

Nominal Payload Class (100%)
98.4 ton (US)
Top Speed - Loaded
41.7 mile/h
Body Capacity - SAE 2:1
83.8 yd³
Maximum Working Payload (110%)
108.2 ton (US)
Note (1)
Capacity with flat floor X Body with liner.
Note (2)
* Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross vehicle weight limitations.
Maximum Allowable Payload (120%)*
118.1 ton (US)
Target Payload (100%)
98.4 ton (US)

Engine

Engine Model
Cat C32
Gross Power - SAE J1995
1025 HP
Net Power - SAE J1349
916 HP
Net Power - 80/1269/EEC
916 HP
Net Power - ISO 9249
916 HP
Bore
5.7 in
Stroke
6.4 in
Displacement
1959 in³
Note (2)
Ratings based on SAE J1995 standard air conditions of 25° C (77° F) and 100 kPa (29.61 Hg) barometer. Power based on fuel having API gravity of 35 at 16° C (60° F) and an LHV of 42 780 kJ/kg (18,390 BTU/lb) when engine used at 30° C (86° F).
Note (1)
Power rating applies at 1,800 rpm when tested under the specified condition for the specified standard.
Cylinders
12
Engine Power - ISO 14396
1008 HP
Engine Speed
1800 r/min
Net Torque
3899 ft-lb
Peak Torque - Speed
1200 r/min
Note (3)
No engine derating required up to 2286 m (7,500 ft) for Tier 4/Stage V.
Note (4)
Meets EU Stage V emission standards.

Capacity - Dual Slope - 100% Fill Factor

Struck
54.8 yd³
Heaped 2:1 (SAE)
78.8 yd³
Heaped (SAE 2:1)*
78.8 yd³
Note (1)
Contact your local Cat dealer for body recommendation.
Note (2)
*ISO 6483:1980

Weight Distributions - Approximate

Front Axle - Empty
46 %
Front Axle - Loaded
33 %
Rear Axle - Empty
54 %
Rear Axle - Loaded
67 %

Transmission

Forward - 1
6.8 mile/h
Forward - 2
9.2 mile/h
Forward - 3
12.5 mile/h
Forward - 4
16.9 mile/h
Forward - 5
22.9 mile/h
Forward - 6
30.7 mile/h
Forward - 7
41.7 mile/h
Reverse
7.7 mile/h
Note
Maximum travel speeds with standard 27.00R49 (E4) tires.

Final Drives

Differential Ratio
2.736:1
Planetary Ratio
7.0:1
Total Reduction Ratio
19.1576:1

Brakes

Brake Standards
ISO 3450-2011
Brake Surface Area - Front
6331 in²
Brake Surface Area - Rear
15828 in²

Service Refill Capacities

Fuel Tank (1)
300 gal (US)
Cooling System
63.4 gal (US)
Steering System - Including Tank
14.1 gal (US)
Brake Hoist System
85 gal (US)
Brake Hoist System - Includes Tank
117 gal (US)
Crankcase
28.7 gal (US)
Differentials
59.9 gal (US)
Final Drive - Each
20 gal (US)
Fuel Tank (2)
350 gal (US)
Torque Converter - Transmission System
36.5 gal (US)

Body Hoists

Pump Flow - High Idle
120.9 gal/min
Relief Valve Setting - Raise
2750 psi
Relief Valve Setting - Lower
500 psi
Body Raise Time - High Idle
15 s
Body Lower Time - Float
13 s
Body Lower Time - High Idle
13 s

Suspension

Rear axle - Oscillation
5.4 °
Empty Loaded Cylinder Stroke Front
2.9 in
Empty Loaded Cylinder Stroke Rear
2.5 in

Weights - Approximate

Target Gross Machine Weight
363000 lb

Steering

Turning Diameter - Front
83 ft
Steering Standards
ISO 5010:2007
Steer Angle
30.5 °
Turning Circle - Clearance Diameter
93 ft

Capacity - X Body - 100% Fill Factor

Struck
56.3 yd³
Heaped (SAE 2:1)*
83.8 yd³
Note (1)
Contact your local Cat dealer for body recommendation.
Note (2)
*ISO 6483:1980
Heaped 2:1 (SAE)
83.8 yd³

Capacity - Coal Bodies - 100% Fill Factor

SAE 2:1 - For use with material densities less than 950 kg/m3 (1,600 lb/yd3)
165 yd³
SAE 2:1 - For use with material densities of 1040-1160 kg/m3 (1,750-1,950 lb/yd3)
139 yd³
SAE 2:1 - For use with material densities of 1160 kg/m3 (1,950 lb/yd3)
116 yd³
SAE 2:1 - For use with material densities of 950-1040 kg/m3 (1,600-1,750 lb/yd3)
144 yd³

Tires

Note (1)
Productive capabilities of the 777G truck are such that, under certain job conditions, TKPH (TMPH) capabilities of standard or optional tires could be exceeded and, therefore, limit production.
Note (2)
Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
Standard Tire
27.00R49 (E4)

ROPS

FOPS Standards
Falling Objects Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
ROPS Standards
Rollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.

Sound

Sound Standards (1)
The operator Equivalent Sound Pressure Level (Leq) is 73 dB(A) when SAE J1166 FEB2008 is used to measure the value for an enclosed cab. This is a work cycle sound exposure level. The cab was properly installed and maintained. The test was conducted with t
Sound Standards (2)
The exterior sound pressure level for the standard machine measured at a distance of 15 m (49 ft) according to the test procedures specified in SAE J88:2008, mid‑gear moving operation is 83 dB(A) for Tier 4 trucks.
Sound Standards (3)
Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment.