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772G Off-Highway Truck

772G Off-Highway Truck

At a Glance

Nominal Payload Class (100%)
51.6 ton (US)
Engine Model
Cat® C18
Top Speed - Loaded
49.2 mile/h
Rated Engine Speed
1700 r/min
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Your long-term success is our goal here at Cat, so we’ve developed our 772G to be more productive and economical for our customers for years to come. Equipped with new transmission controls, the 772G is built for heavy-duty, off-road applications and delivers quick haul cycles with automotive-quality shifting and comfort. The 772G is also built with a Cat C18 diesel engine and with our fuel saving strategies, you can adjust engine power to meet your specific needs. Ideal pass match options for the 772G are the Cat 986K or the 988K Wheel Loader and the 390F L Hydraulic Excavator. When you consider its fuel efficiency and performance, the 772G is the right Off-Highway Truck for all generations.

Operating Specifications

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Nominal Payload Class (100%) 51.6ton (US)
Top Speed - Loaded 49.2mile/h
Body Capacity - SAE 2:1 40.8yd³
Maximum Payload Class (110%) 56.7ton (US)
Not to Exceed Payload (120%) 61.9ton (US)
Target Payload Capacity 51.6ton (US)


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Engine Model Cat® C18
Rated Engine Speed 1700r/min
Gross Power - SAE J1995 605HP
Net Power - SAE J1349 550HP
Net Power - ISO 9249 550HP
Number of Cylinders 6
Bore 5.7in
Stroke 7.2in
Displacement 1105in³
Engine Power - ISO 14396 598HP
Net Torque - SAE J1349 2221ft-lb

Weights - Approximate

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Target Gross Machine Operating Weight 181000lb
Chassis Weight 59223lb
Body Weight 17306lb
Target Gross Machine Weight 181000lb

Weight Distributions - Approximate

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Front Axle - Empty 51.4%
Front Axle - Loaded 34.2%
Rear Axle - Empty 48.6%
Rear Axle - Loaded 65.8%


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Forward - 1 8mile/h
Forward - 2 10.9mile/h
Forward - 3 14.8mile/h
Forward - 4 19.8mile/h
Forward - 5 26.9mile/h
Forward - 6 36.2mile/h
Forward - 7 49.2mile/h
Reverse 10.4mile/h

Final Drives

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Differential Ratio 2.74:1
Planetary Ratio 4.80:1
Total Reduction Ratio 13.14:1


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Brake Surface - Front 216in²
Brake Surface - Rear 7794in²
Brake Standards ISO 3450:1996

Service Refill Capacities

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

Body Hoists

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


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Rear axle - Oscillation 8.9°
Empty Loaded Cylinder Stroke Front 9.2in
Empty Loaded Cylinder Stroke Rear 5.8in

Capacity - Dual Slope - 100% Fill Factor

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Struck 31.3yd³
Heaped 2:1 (SAE) 40.8yd³

Capacity - Flat Floor - 100% Fill Factor

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Struck 31.3yd³
Heaped 2:1 (SAE) 40.9yd³


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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 115 dB(A).
Sound Standards (3) Operator Equivalent Sound Pressure Level (Leq) is 74 dB(A) when ISO 6396:2008 is used to measure the value for an enclosed cab.


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


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Height - Top of ROPS 12.8ft
Inside Body Depth - Maximum 5.7ft
Overall Body Length 26.8ft
Inside Body Length 19ft
Overall Length 28.9ft
Wheel Base 13ft
Rear Axle - Tail 9.5ft
Ground Clearance 1.6ft
Dump Clearance 1.5ft
Loading Height - Empty 11.6ft
Overall Height - Body Raised 27.1ft
Operating Width 15.7ft
Centerline Front Tire Width 10.4ft
Engine Guard Clearance 2ft
Outside Body Width 12.9ft
Inside Body Width 11.9ft
Front Canopy Height 13.7ft
Rear Axle - Clearance 1.9ft
Centerline of Rear Dual Tire Width 8.7ft
Overall Tire Width 12.9ft


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Turning Diameter - Front 57.7ft
Steering Standards ISO 5010:2007
Steer Angle 31°
Turning Circle - Clearance Diameter 66.6ft


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Standard Tire 21.00R33 (E4)