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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.

Cat Specs

Operating Specifications

Nominal Payload Class (100%)
70.5 ton (US)
Top Speed - Loaded
41.6 mile/h
Maximum Working Payload (110%)
77.5 ton (US)
Body Capacity - SAE 2:1
55.23 yd³
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.


Gross Power - SAE J1995
825 HP
Net Power - ISO 9249
775 HP
Engine Power - ISO 14396
812 HP
Meets EU Stage V emission standards.
Net Power - SAE J1349
768 HP
Net Power - 80/1269/EEC
775 HP
Rated Engine Speed
1800 r/min
5.4 in
6 in
1648 in²
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 B
Note (3)
No engine derating required up to 3810 m (12,500 ft) for Tier 2 Equivalent.
Note (1)
Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
Engine Model
Cat® C27


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


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

Service Refill Capacities

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


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

Final Drives

Differential Ratio
Planetary Ratio
Total Reduction Ratio

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

42.7 yd³

Capacity - Flat Floor - 100% Fill Factor

42.2 yd³

Weight Distributions - Approximate

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


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


Standard Tire
24.00R35 (E4)
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.


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)
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
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.