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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.

Cat Specs

Operating Specifications

Nominal Payload Class (100%)
98.4 ton (US)
Top Speed - Loaded
41.7 mile/h
Maximum Working Payload (110%)
108.2 ton (US)
Body Capacity - SAE 2:1
83.8 yd³
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.


Gross Power - SAE J1995
1025 HP
Net Power - SAE J1349
916 HP
Net Power - 80/1269/EEC
916 HP
Note (1)
Power rating applies at 1,800 rpm when tested under the specified condition for the specified standard.
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 B
Note (3)
No engine derating required up to 2286 m (7,500 ft) for Tier 4/Stage V.
5.7 in
6.4 in
Note (4)
Meets EU Stage V emission standards.
1959 in²
Engine Model
Cat C32
Net Power - ISO 9249
916 HP
Engine Power - ISO 14396
1008 HP

Weights - Approximate

Target Gross Machine Weight
363000 lb


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

Final Drives

Differential Ratio
Planetary Ratio
Total Reduction Ratio


Brake Standards
ISO 3450-2011

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

Capacity - Dual Slope - 100% Fill Factor

54.8 yd³

Weight Distributions - Approximate

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


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

Service Refill Capacities

Steering System - Including Tank
14.1 gal (US)
Brake Hoist System
85 gal (US)
Torque Converter - Transmission System
36.5 gal (US)
28.7 gal (US)
Cooling System
63.4 gal (US)
Final Drive - Each
20 gal (US)


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


Standard Tire
27.00R49 (E4)
Note (2)
Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
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.


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


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
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
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.
With Cooling Fan Speed at Maximum Value – Note