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775G Off-Highway Truck

775G Off-Highway Truck

At a Glance

Nominal Payload Class (100%)
70.5 ton (US)
Engine Model
Cat® C27
Top Speed - Loaded
41.6 mile/h
Rated Engine Speed
1800 r/min
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Having a solid track record in the quarry and aggregates industry, Cat’s 775G has been designed and manufactured using the latest quality control technologies—both virtually and hands on—to ensure your Off-Highway Truck is ready to do work. Built with a Cat C27 diesel engine, the 775G has improved fuel efficiency and delivers an additional 5% horsepower. Our 775G is a great pass match for the Cat 988K or 990K Wheel Loader, too. By having the Cat G Series trucks in your haul fleets, you can be more productive, spend less time on maintenance, and support the environment with new levels of eco performance. Which ultimately allows you to make a positive impact within your business and community every day.

Operating Specifications

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Nominal Payload Class (100%) 70.5ton (US)
Top Speed - Loaded 41.6mile/h
Maximum Working Payload (110%) 77.5ton (US)
Body Capacity - SAE 2:1 55.23yd³
Target Payload (100%) 70.5ton (US)
Maximum Allowable Payload (120%)* 84.6ton (US)
Note (2) * Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
Note (1) Capacity with Dual Slope body – no liner.


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Engine Model Cat® C27
Rated Engine Speed 1800r/min
Gross Power - SAE J1995 825HP
Net Power - SAE J1349 768HP
Net Power - 80/1269/EEC 775HP
Net Power - ISO 9249 775HP
Bore 5.4in
Stroke 6in
Displacement 1648in³
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 (1) Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
Emissions Meets EU Stage V emission standards.
Engine Power - ISO 14396 812HP
Net Torque 3148ft-lb
Peak Torque - Speed 1200r/min
Note (3) No engine derating required up to 3810 m (12,500 ft) for Tier 2 Equivalent.

Capacity - Dual Slope - 100% Fill Factor

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Struck 42.7yd³
Note (2) *ISO 6483:1980
Heaped (SAE 2:1)* 55.5yd³
Note (1) Contact your local Cat dealer for body recommendation.

Capacity - Flat Floor - 100% Fill Factor

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Struck 42.2yd³
Note (2) *ISO 6483:1980
Heaped (SAE 2:1)* 55.2yd³
Note (1) Contact your local Cat dealer for body recommendation.

Weight Distributions - Approximate

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Front Axle - Empty 50%
Front Axle - Loaded 34%
Rear Axle - Empty 50%
Rear Axle - Loaded 66%


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

Final Drives

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


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

Service Refill Capacities

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Fuel Tank 210gal (US)
Cooling System 45gal (US)
Differential - Final Drives 38gal (US)
Steering Tank 9.5gal (US)
Steering System - Including Tank 14gal (US)
Brake Hoist System 85gal (US)
Brake/Hoist Hydraulic Tank 46.5gal (US)
Crankcase 24gal (US)
Torque Converter - Transmission System - HRC 18gal (US)
Torque Converter - Transmission System - LRC 16gal (US)

Body Hoists

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

Weights - Approximate

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Maximum Gross Vehicle Weight 246503lb


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


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Turning Diameter - Front 77.1ft
Steering Standards ISO 5010:2007
Steer Angle 31°
Turning Circle - Clearance Diameter 85.6ft


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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 t


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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.


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Note (2) Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
Note (1) Productive capabilities of the 775G truck are such that, under certain job conditions, TKPH (TMPH) capabilities of standard or optional tires could be exceeded and, therefore, limit production.
Standard Tire 24.00R35 (E4)


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Recyclability 98%