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The G Series represents a new era for Cat’s Off-Highway Trucks and the 773G provides our customers with a quality operating environment that enhances productivity and provides significant savings in fuel consumption, too. Ergonomically designed with an operator’s comfort in mind, the 773G has an updated cab with new comforts as well as controls conveniently placed within reach of the operator’s hands. Built with a Cat C27 diesel engine, this 60-ton payload uses increased torque delivering 5% additional horsepower. An ideal pass match for the 773G Off-Highway Truck is Cat’s 988K Wheel Loader, 990K Wheel Loader, or the 390F Hydraulic Excavator. Simply put, the 773G will make a positive difference in haul performance all day, every day for today and tomorrow’s work.

Cat Specs


Net Power - ISO 9249
762 HP
Gross Power - SAE J1995
775 HP
Engine Power - ISO 14396
764 HP
Engine Model
Cat® C27
Net Power - SAE J1349
719 HP
Net Power - 80/1269/EEC
762 HP
Rated Engine Speed
1800 r/min
5.4 in
6 in
1648 in²
Note (1)
Power rating applies at 2,000 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 3048 m (10,000 ft) for Tier 4/Stage V.

Operating Specifications

Nominal Payload Class (100%)
61 ton (US)
Top Speed - Loaded
41.6 mile/h
Maximum Working Payload (110%)
67.1 ton (US)
Body Capacity - SAE 2:1
46.8 yd³
Note (1)
Capacity with Dual Slope body – no liner.
Note (2)
*?Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.


Brake Surface - Front
257 in²
Brake Surface - Rear
9497 in²
Brake Standards
ISO 3450:2011


Steering Standards
SAE J1511 FEB94 ISO 5010:1992
Steer Angle
31 °
Turning Circle - Clearance Diameter
85.6 ft
Turning Diameter - Front
77.1 ft

Service Refill Capacities

Brake/Hoist Hydraulic Tank
46.5 gal (US)
Brake Hoist System
85 gal (US)
Differential - Final Drives
38 gal (US)
Steering System - Including Tank
14 gal (US)
Steering Tank
9.5 gal (US)
24 gal (US)
Fuel Tank
210 gal (US)
Cooling System
45 gal (US)


Forward - 5
22.8 mile/h
Forward - 6
30.7 mile/h
Forward - 7
41.6 mile/h
Forward - 1
6.6 mile/h
Forward - 2
9.3 mile/h
8.7 mile/h
Forward - 4
16.8 mile/h
Forward - 3
12.6 mile/h
Maximum travel speeds with standard 24.00R35 (E4) tires.

Final Drives

Differential Ratio
Planetary Ratio
Total Reduction Ratio

Body Hoists

Pump Flow - High Idle
118 gal/min
Relief Valve Setting - Raise
2502 psi
Relief Valve Setting - Lower
500 psi
Body Raise Time - High Idle
10 s
Body Lower Time - Float
14 s
Body Power Down - High Idle
14 s

Capacity - Dual Slope - 100% Fill Factor

35.13 yd³

Capacity - Flat Floor - 100% Fill Factor

34.33 yd³

Weight Distributions - Approximate

Front Axle - Empty
53 %
Front Axle - Loaded
35 %
Rear Axle - Empty
47 %
Rear Axle - Loaded
65 %


Empty Loaded Cylinder Stroke Front
9.2 in
Empty Loaded Cylinder Stroke Rear
5.8 in
Rear axle - Oscillation
8.1 °


Standard Tire
24.00R35 (E4)
Note (1)
Productive capabilities of the 773G 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.


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


Sound Standards (1)
The operator Equivalent Sound Pressure Level (Leq) is 76 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 86 dB(A).
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.


Steering Circuit (@ High Idle)
73.2 gal/min