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777E Off-Highway Truck
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Standard Equipment

Capacity - Dual Slope - 100% Fill Factor

55 yd3
Heaped 2:1 (SAE)
78.6 yd3

Service Refill Capacities

Fuel Tank
300 gal
Cooling System
56 gal
Steering System (Includes Tank)
15.6 gal
29.9 gal
58.6 gal
Final Drives (each)
11 gal
Fuel Tank
101.7 gal
Torque Converter/Transmission System
32.2 gal

Body Hoists

Pump Flow - High Idle
130 gal/min
Body Raise Time - High Idle
15 Seconds


Standard Tire
27.00R49 (E4)


Engine Model
Gross Power - SAE J1995
1016 hp
Net Power - SAE J1349
949 hp
Net Power - 80/1269/EEC
Power rating applies at 1,750 rpm when tested under the specified condition for the specified standard. hp
Net Power - ISO 9249
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 hp
5.7 in
6.4 in
1959 in3
Engine Power - ISO 14396
1004 hp
Engine Speed
1750 RPM
Net Torque
3509 ft-lb
Peak Torque Speed
23% RPM

Capacity - X Body - 100% Fill Factor

Heaped 2:1 (SAE)
83.8 yd3
56.3 yd3

Operating Specifications

Nominal Payload Class (100%)
108 tons
Top Speed - Loaded
40.9 mph


Forward 1
6.6 mph
Forward 3
12.2 mph
Forward 5
22.5 mph
Forward 6
Maximum travel speeds with standard 27.00R49 (E4) tires. mph
Forward 7
40.9 mph
7.5 mph

Weight Distributions - Approximate

Front Axle - Empty
44%/30% %
Rear Axle - Empty
56%/70% %

Final Drives

Differential Ratio
Planetary Ratio
Total Reduction Ratio


Turning Diameter - Front
83 ft
Steering Standards
ISO 5010:2007
Steer Angle
30.5° Degrees
Turning Circle Clearance Diameter
93.17 ft


Brake Standards
ISO 3450:2011
Brake Surface Area - Front
432 in2
Brake Surface Area - Rear
6331 in2


Sound Standards
ISO 6393:2008, SAE J1166:2008


ROPS/FOPS Standards
ROPS (Rollover Protective Structure) cab offered by Caterpillar meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.


Rear Axle Oscillation
5.4° Degrees
Empty Loaded Cylinder Stroke Front
12.5 in
Empty Loaded Cylinder Stroke Rear
6.5 in


Power Train

The updated Cat® C32 ACERT™ engine and powerful torque converter with ECPC (Electronic Clutch Pressure Control) Transmission provides superior performance. The ECPC Transmission with controlled throttle shifting regulates engine speed, torque converter lock-up and transmission clutch engagement for smoother shifts, reduced clutch wear and longer component life.

Fuel Economy

The 777E fuel saving strategies find opportunities to reduce fuel burn and fuel costs. 1) Economy Mode modifies engine maps to take advantage of steady grades and level ground, reducing power and fuel burn. 2) Speed Limiting automatically selects the most fuel efficient gear and speed for the terrain instantaneously. 3) Engine Idle Shutdown identifies when the truck is in park and idles for more than a preset time, and initiates engine shutdown to conserve fuel.

Engine Over Speed Protection

Electronically senses engine conditions and automatically up-shifts one gear to prevent over speeding. If over speeding occurs in the top gear, the lock-up clutch is disengaged, and the brakes are applied.

Operator Comfort

The all new operator station interior is ergonomically designed for total machine control in a comfortable, productive and safe environment. All controls, levers, switches and gauges are positioned to maximize productivity and minimize operator fatigue. Designed for excellent all-around visibility and clear sight lines to the haul road, the large viewing area offers exceptional visibility. The well positioned hand rails ensure three point contact for safe and easy access and emergency egress for the operator.

Diagnostic Capability

Critical power train data, including transmission shifting, engine speed and fuel consumption, provides service technicians with enhanced diagnostic capability to reduce downtime and operating costs.

Electronic Technician (ET)

Cat ET service tool provides service technicians with easy access to stored diagnostic data through the Cat Data Link.

Cab and Access

The 777E cab interior, is completely redesigned to provide better visibility and comfort for the operator. Features include a new dash, advisor display and redesigned center console. Rollover and Falling Object Protection is an extension of the truck frame.

Operator Seat

The Cat Comfort Seat uses full air suspension to smooth rough rides, and has a retractable four-point seat belt with a shoulder harness. A Trainer seat with a lap belt to facilitate on-the-job training.


The Cat Front dry caliper with rear oil-cooled multiple disc brakes deliver reliable performance and control in the most extreme haul-road conditions. Wet brakes on rear wheels and gear limiting during body up operations are both standard. If equipped with front oil cooled multiple disc brakes, four corner retarding with a 40/60 percent front/rear split provides superior control in slippery conditions and minimizes wheel lock-up.

Automatic Retarder Control (ARC) (optional)

ARC controls braking on grade electronically, maintaining consistent engine speed, lower fuel burn, and better control.

Traction Control System (TCS) (optional)

The Traction Control System electronically monitors and controls rear wheel slippage for greater traction and enhanced truck performance in poor underfoot conditions. If slippage exceeds a set limit, the rear wet brakes engage to slow the spinning wheel. Torque is then automatically transferred to the wheel with better traction and optimum control.


Cat integrated steering and suspension system is designed for precise steering, excellent maneuverability, minimal tire wear and superior ride control.

Secondary Steering

Automatically engages if power source for the normal steering fails.


Rear wheel spindles are solid steel for longer life, and the rear suspension cylinders have been inverted to minimize contamination. These rugged cylinders use large diameter bore and low pressure nitrogen/oil design for long life with minimal maintenance.