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773G Off-Highway Truck

773G Off-Highway Truck

Enhanced performance

More Comfort – More Performance – More Versatility

  • Up To 9% Less Fuel Consumption

    Utilizing Adaptive Economy Mode helps save on fuel consumption while maintaining productivity.

  • Enhanced Operator Comfort

    New left side seat placement allows for an easier operation and new levels of comfort all throughout the work day

  • Expanded Performance

    Get the job done faster and more efficiently with increased travel speeds and improved traction control.

  • Up To 9% Less CO2 Emissions

    The 773G emits up to 9% less CO2 than the previous 773F.


Bore 5.4 in
Displacement 1648 inÂł
Engine Model Cat® C27
Engine Power - ISO 14396 764 HP
Gross Power - SAE J1995 775 HP
Net Power - 80/1269/EEC 762 HP
Net Power - ISO 9249 762 HP
Net Power - SAE J1349 719 HP
Net Torque 3148 ft-lb
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 BTU/lb) when engine used at 30° C (86° F).
Note (3) No engine derating required up to 3048 m (10,000 ft) for Tier 4/Stage V.
Peak Torque - Speed 1200 r/min
Rated Engine Speed 1800 r/min
Stroke 6 in

Weights - Approximate

Maximum Gross Vehicle Weight 226501 lb

Operating Specifications

Body Capacity - SAE 2:1 46.8 ydÂł
Maximum Allowable Payload (120%)* 73.2 ton (US)
Maximum Working Payload (110%) 67.1 ton (US)
Nominal Payload Class (100%) 61 ton (US)
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.
Target Payload (100%) 61 ton (US)
Top Speed - Loaded 41.6 mile/h


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

Final Drives

Differential Ratio 3.64:1
Planetary Ratio 4.80:1
Total Reduction Ratio 17.49:1


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

Body Hoists

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

Capacity - Dual Slope - 100% Fill Factor

Heaped (SAE 2:1)* 46.76 ydÂł
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) * ISO 6483:1980.
Struck 35.13 ydÂł

Capacity - Flat Floor - 100% Fill Factor

Heaped (SAE 2:1)* 46.41 ydÂł
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) * ISO 6483:1980.
Struck 34.33 ydÂł

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 °

Service Refill Capacities

Brake Hoist System 85 gal (US)
Brake/Hoist Hydraulic Tank 46.5 gal (US)
Cooling System 45 gal (US)
Crankcase 24 gal (US)
Differential - Final Drives 38 gal (US)
Fuel Tank 210 gal (US)
Steering System - Including Tank 14 gal (US)
Steering Tank 9.5 gal (US)
Torque Converter - Transmission System - HRC 18 gal (US)


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.
Standard Tire 24.00R35 (E4)


FOPS Standards Falling Object 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 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 installed and maintained. The test was conducted with the cab doors and the cab windows closed.
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.


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

Download resources

773G Product Brochure
773G Key Features
773G Technical Specifications

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