New CAT Equipment

773G Off-Highway Truck

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.

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    Product Specs


    Engine Model Cat® C27
    Rated Engine Speed 1800 r/min
    Gross Power - SAE J1995 775 HP
    Net Power - SAE J1349 719 HP
    Net Power - ISO 9249 762 HP
    Net Power - 80/1269/EEC 762 HP
    Bore 5.4 in
    Stroke 6 in
    Displacement 1648 in³
    Note (1) Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
    Engine Power - ISO 14396 764 HP
    Peak Torque - Speed 1200 r/min
    Net Torque 3148 ft-lb
    Note (3) No engine derating required up to 3048 m (10,000 ft) for Tier 4/Stage V.
    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).

    Weights - Approximate

    Maximum Gross Vehicle Weight 226501 lb

    Operating Specifications

    Nominal Payload Class (100%) 61 ton (US)
    Top Speed - Loaded 41.6 mile/h
    Note (2) * Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
    Maximum Working Payload (110%) 67.1 ton (US)
    Note (1) Capacity with Dual Slope body – no liner.
    Body Capacity - SAE 2:1 46.8 yd³
    Target Payload (100%) 61 ton (US)
    Maximum Allowable Payload (120%)* 73.2 ton (US)


    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
    Reverse 8.7 mile/h
    Note Maximum travel speeds with standard 24.00R35 (E4) tires.

    Final Drives

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


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

    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

    Struck 35.13 yd³
    Heaped (SAE 2:1)* 46.76 yd³
    Note (2) * ISO 6483:1980.
    Note (1) Contact your local Cat dealer for body recommendation.

    Capacity - Flat Floor - 100% Fill Factor

    Struck 34.33 yd³
    Note (2) * ISO 6483:1980.
    Heaped (SAE 2:1)* 46.41 yd³
    Note (1) Contact your local Cat dealer for body recommendation.

    Weight Distributions - Approximate

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


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

    Service Refill Capacities

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


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