New CAT Equipment

770G Off-Highway Truck

In 1963 Caterpillar introduced the 769, a revolutionary off-road truck that was purpose-built for the rigors of mining and heavy construction. Fifty years later, our trucks have never been better. We’ve taken the best of our rugged, dependable heritage and combined it with technologies that help our environment, make your operators more productive, and dramatically improve the economics of your haul fleet. The 770G has an updated Traction Control System (TCS) to keep you moving even when the ground conditions aren’t perfect. You’ll see improvements in fuel use through new and flexible fuel savings and we're making the operating experience best in class with automotive quality shifting, noise reduction, and cab updates. Our heritage and new use of technology are combined in this truck for one purpose – the continued success of your business.

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    Learn more about the 770G Off-Highway Truck


    Product Specs


    Engine Model Cat® C15
    Rated Engine Speed 1700 r/min
    Gross Power - SAE J1995 515 HP
    Net Power - SAE J1349 477 HP
    Net Power - ISO 9249 477 HP
    Net Power - 80/1269/EEC 489 HP
    Net Power - ISO 14396 508 HP
    Net Torque - SAE J1349 1834 ft·lbf
    Number of Cylinders 6
    Bore 5.4 in
    Stroke 6.7 in
    Displacement 927.6 in³
    Emissions Meets U.S. EPA Tier 4 and EU Stage V emission standards.
    Note (1) Power rating applies at 1,700 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 3000 m (9,843 ft) altitude.
    Note (4) Meets Japan Small Volume Exemption.

    Weights - Approximate

    Target Gross Machine Operating Weight 157000 lb
    Target Gross Machine Weight 157000 lb
    Chassis Weight 55948 lb
    Body Weight 17306 lb
    Note (1) Chassis weight with 100% fuel, hoist, body mounting group, rims, and tires.
    Note (2) Body weight is the standard Dual Slope body with no liner and will vary depending on configuration.

    Operating Specifications

    Nominal Payload Class (100%) 42.1 ton (US)
    Top Speed - Loaded 45.8 mile/h
    Target Payload (100%) 42.1 ton (US)
    Maximum Working Payload (110%) 46.3 ton (US)
    Maximum Allowable Payload (120%)* 50.5 ton (US)
    Body Capacity - SAE 2:1 32.9 yd³
    Note (1) *Refer to Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
    Note (2) Target payload and capacity based on Dual Slope body with no liner. Attachment selection will affect payload and maximum gross machine operating weight.


    Forward - 1 7.4 mile/h
    Forward - 2 10.1 mile/h
    Forward - 3 13.8 mile/h
    Forward - 4 18.5 mile/h
    Forward - 5 25.1 mile/h
    Forward - 6 33.8 mile/h
    Forward - 7 45.8 mile/h
    Reverse 8.8 mile/h
    Note Maximum travel speeds with standard 18.00R33 (E4) tires.

    Final Drives

    Differential Ratio 1.92:1
    Planetary Ratio 4.80:1
    Total Reduction Ratio 9.26:1


    Brake Surface - Front 216 in²
    Brake Surface - Rear 6235 in²
    Brake Standards ISO 3450:2011
    Note Target gross machine operating weight is 71 214 kg (157,000 lb).

    Body Hoists

    Pump Flow - High Idle 118 gal/min
    Relief Valve Setting - Raise 2750 psi
    Relief Valve Setting - Lower 500 psi
    Body Raise Time - High Idle 7.5 s
    Body Lower Time - Float 10 s
    Body Power Down - High Idle 10 s

    Capacity - Dual Slope - 100% Fill Factor

    Struck 23.01 yd³
    Heaped (SAE 2:1)* 32.9 yd³
    Note (1) Contact your local Cat dealer for body recommendation.
    Note (2) *ISO 6483:1980.

    Capacity - Flat Floor - 100% Fill Factor

    Struck 23.01 yd³
    Heaped (SAE 2:1)* 32.9 yd³
    Note (1) Contact your local Cat dealer for body recommendation.
    Note (2) *ISO 6483:1980.

    Weight Distributions - Approximate

    Front Axle - Empty 49 %
    Front Axle - Loaded 34 %
    Rear Axle - Empty 51 %
    Rear Axle - Loaded 66 %


    Empty Loaded Cylinder Stroke Front 9.2 in
    Empty Loaded Cylinder Stroke Rear 5.9 in
    Rear axle - Oscillation 8.9 °

    Service Refill Capacities

    Fuel Tank 140 gal (US)
    Cooling System 33 gal (US)
    Crankcase 17 gal (US)
    Differential - Final Drives 47 gal (US)
    Steering Tank 14.5 gal (US)
    Steering System - Including Tank 23 gal (US)
    Brake/Hoist Hydraulic Tank 38 gal (US)
    Brake Hoist System 60 gal (US)
    Torque Converter - Transmission System 17 gal (US)
    DEF Tank 6 gal (US)


    Standard Tire 18.00R33 (E4)
    Note (1) Productive capabilities of the 770G 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 evaluates all job conditions and consults 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 Objects Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.


    Sound Standards (1) Hearing protection may be needed when operating with open operator station & cab for extended periods or in noisy environment.
    Sound Standards (2) Exterior sound pressure power level for standard machine measured according to tests specified in ISO 6395:2008 is 116 dB(A).
    Sound Standards (3) Operator Equivalent Sound Pressure Level is 79 dB(A) & 74 dB(A) with EU sound suppression applied when ISO 6396:2008 is used.


    Steering Standards ISO 5010:2007
    Steer Angle 40.5 °
    Turning Diameter - Front 57.7 ft
    Turning Circle - Clearance Diameter 66.6 ft
    Note Target gross machine operating weight is 71 214 kg (157,000 lb).


    Height - Top of ROPS 12.7 ft
    Overall Body Length 26.8 ft
    Inside Body Length 18.5 ft
    Overall Length 28.9 ft
    Wheel Base 13 ft
    Rear Axle - Tail 8.5 ft
    Ground Clearance 1.6 ft
    Dump Clearance 1.7 ft
    Loading Height - Empty 10.3 ft
    Inside Body Depth - Maximum 4.6 ft
    Overall Height - Body Raised 27.1 ft
    Operating Width 15.7 ft
    Centerline Front Tire Width 10.2 ft
    Engine Guard Clearance 1.8 ft
    Outside Body Width 12.9 ft
    Inside Body Width 11.9 ft
    Front Canopy Height 13.5 ft
    Rear Axle - Clearance 1.8 ft
    Centerline of Rear Dual Tire Width 8.3 ft
    Overall Tire Width 12.1 ft