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Off-Highway Trucks

Caterpillar builds Off-Highway Trucks specifically for work in mines, construction and quarries. Our Off-Highway Trucks are pass-matched with Cat Wheel Loaders and Hydraulic Excavators to speed cycle times and maximize productivity.

777E Off-Highway Truck

  • Specification Summary

  • Engine Model Cat C32
  • Bore 145 mm
  • Stroke 162 mm
  • Displacement 32.1 l
  • Product Brochure


Product Details


Engine Model Cat C32
Bore 145 mm
Stroke 162 mm
Displacement 32.1 l
Engine Power - ISO 14396 749 kW
Net Torque - 1,300 rpm 4757 N·m
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).
Gross Power - SAE J1995 758 kW
Engine Speed 1750 r/min
Net Torque Rise 23%
Net Power - SAE J1349 708 kW
Note (1) Power rating applies at 1,750 rpm when tested under the specified condition for the specified standard.
Cylinders 12
Emissions (2) Certified for China Nonroad Stage III emission standards.
Emissions (1) Meets U.S. EPA Tier 2 Equivalent emission standards.
Note (3) No engine derating required up to 3048 m (10,000 ft) altitude.

Operating Specifications

Nominal Payload Class (100%) 92.6 ton (US)
Top Speed - Loaded 65.9 km/h
Maximum Payload Class (110%) 98.2 ton (US)


Forward - 1 10.7 km/h
Forward - 3 19.8 km/h
Forward - 5 36.2 km/h
Forward - 7 65.9 km/h
Note Maximum travel speeds with standard 27.00R49 (E4) tires.
Reverse - 1 12.1 km/h

Final Drives

Differential Ratio 2.74:1
Planetary Ratio 7.00:1
Total Reduction Ratio 19.16:1


Brake Surface Area - Front Caliper 2787 cm²
Brake Surface Area - Front OCDB 40846 cm²
Brake Standards ISO 3450:2011
Brake Surface Area - Rear 102116 cm²

Body Hoists

Body Raise Time - High Idle 15 s
Pump Flow - High Idle 491 l/min

Capacity - Dual Slope - 100% Fill Factor

Struck 42.1 m³
Heaped 2:1 (SAE) 60.1 m³

Weight Distributions - Approximate

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


Effective Cylinder Stroke - Front 318 mm
Effective Cylinder Stroke - Rear 165 mm
Rear axle - Oscillation 5.4°

Service Refill Capacities

Fuel Tank 1140 l
Cooling System 212 l
Differentials 222 l
Crankcase 113.5 l
Final Drive - Each 42 l
Torque Converter - Brake - Hoist Hydraulic Tank 385 l
Steering System - Includes Tank 59 l
Transmission System 122 l


Standard Tire 27.00R49 (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 777E truck are such that, under certain job conditions, TKPH (TMPH) capabilities of standard or optional tires could be exceeded and, therefore, limit production.


ROPS ROPS (Rollover Protective Structure) cab offered by Caterpillar meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer.
FOPS FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 for Operator and ISO 13459:2012 Level II FOPS criteria for Trainer.


Sound Standards ISO 6393:2008, SAE J1166:2008
Note (1) The operator sound exposure Leq (equivalent sound pressure level) measured according to work cycle procedures specified in SAE J1166:2008 is 80 dB(A) for cab offered by Caterpillar, when properly installed and maintained and tested with doors and windows closed.
Note (2) The dynamic operator sound pressure level is 80 dB(A) as per ISO 6396:2008 for cab offered by Caterpillar. When properly installed and maintained and tested with doors and windows closed.


Turning Diameter - Front 25.3 m
Steering Standards ISO 5010:2007
Steer Angle 30.5°
Turning Circle - Clearance Diameter 28.4 m
Note Separate hydraulic system prevents cross-contamination.

Capacity - X Body - 100% Fill Factor

Struck 43.1 m³
Heaped 2:1 (SAE) 64.1 m³

Dimensions (Approximate) - Dual Slope

Overall Canopy Width 6200 mm
Operating Width - Extended Catwalk 6545 mm
Centerline of Rear Dual Tire Width 3576 mm
Overall Body Length 9555 mm
Overall Height - Body Raised 9953 mm
Outside Body Width 5524 mm
Wheel Base 4570 mm
Inside Body Depth - Maximum 1895 mm
Overall Front Tire Width 4961 mm
Overall Length 10004 mm
Dump Clearance 890 mm
Ground Clearance 896 mm
Rear Axle - Tail 3045 mm
Height - Top of ROPS - Loaded 4730 mm
Centerline Front Tire Width 4163 mm
Inside Body Length 6920 mm
Engine Guard Clearance 864 mm
Inside Body Width 5200 mm
Rear Axle - Clearance 902 mm
Loading Height - Empty 4380 mm
Front Canopy Height - Loaded 5177 mm
Overall Tire Width 5262 mm
Operating Width 6105 mm

Dimensions (Approximate) - X Body

Overall Canopy Width 6200 mm
Centerline Front Tire Width 4163 mm
Dump Clearance 818 mm
Operating Width - Extended Catwalk 6545 mm
Overall Body Length 10070 mm
Overall Tire Width 5262 mm
Front Canopy Height - Loaded 5370 mm
Inside Body Depth - Maximum 1777 mm
Overall Length 10230 mm
Wheel Base 4570 mm
Inside Body Width 5450 mm
Inside Body Length 7186 mm
Overall Front Tire Width 4961 mm
Loading Height - Empty 4430 mm
Rear Axle - Clearance 902 mm
Engine Guard Clearance 864 mm
Height - Top of ROPS - Loaded 4730 mm
Overall Height - Body Raised 10071 mm
Rear Axle - Tail 3263 mm
Operating Width 6105 mm
Ground Clearance 896 mm
Centerline of Rear Dual Tire Width 3576 mm
Outside Body Width 5689 mm

Weights - Dual Slope - With Liner

Empty Operating Weight 70753 kg
Target Gross Machine Weight 163360 kg
Target Payload 92607 kg
Body System Weight 16070 kg

Weights - X Body - Without Liner

Empty Operating Weight 64988 kg
Target Gross Machine Weight 163360 kg
Body System Weight 15900 kg
Target Payload 98372 kg

Weights - X Body - With Liner

Target Payload 93686 kg
Body System Weight 15900 kg
Empty Operating Weight 69674 kg
Target Gross Machine Weight 163360 kg

Weights - Dual Slope - Without Liner

Body System Weight 16070 kg
Empty Operating Weight 65158 kg
Target Gross Machine Weight 163360 kg
Target Payload 98202 kg


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.
    •  Engine idle shutdown
    •  Air-to-air aftercooler (ATAAC)
    •  Air cleaner with precleaner (2)
    •  Automatic cold mode idle control
    •  Electric priming pump
    •  Two starters and four batteries
    •  Fuel filter/water separator
    •  Turbocharger (2)
    •  Braking system<ul><li>Oil cooled, multiple disc (rear)</li><li>Parking</li><li>Secondary</li><li>Caliper disc (front)</li><li>Manual retarder (utilizes rear oil cooled, multiple disc brakes)</l
    •  Body up shift inhibitor
    •  Controlled throttle shifting
    •  Directional shift management
    •  Downshift inhibitor
    •  Neutral start switch
    •  Neutral coast inhibitor
    •  Reverse shift inhibitor
    •  Reverse neutralizer during dumping
    •  Programmable top gear selection
    •  Hydro pneumatic suspension<ul><li>Front and rear</li></ul>
  • Hydro pneumatic suspension
    • Front and rear
      •  Alarm, backup
      •  Alternator, 145 amp
      •  Auxiliary jump start receptacle
      •  Batteries, maintenance-free, 12V (4), 190 amp-hour
      •  Electrical system, 10 amp, 24V to 12V converter
      •  MineStar™ ready
      •  Backup light, halogen
      •  Directional signals/hazard warning<ul><li>Front and rear, LED</li></ul>
      •  Headlights, halogen, with dimmer
      •  Operator access courtesy lights
      •  Stop/tail lights, LED
    • Alarm, backup
      • Alternator, 145 amp
        • Auxiliary jump start receptacle
          • Batteries, maintenance-free, 12V (4), 190 amp-hour
            • Electrical system, 10 amp, 24V to 12V converter
              • MineStar™ ready
                • Backup light, halogen
                  • Directional signals/hazard warning
                    • Front and rear, LED
                    • Headlights, halogen, with dimmer
                      • Operator access courtesy lights
                        • Stop/tail lights, LED
                          • OPERATOR ENVIRONMENT
                            •  HVAC
                            •  Ashtray and cigarette lighter
                            •  Coat hook
                            •  Diagnostic connection port
                            •  Entertainment radio ready<ul><li>Speakers, antenna, wiring harness</li></ul>
                            •  Air cleaner service indicator
                            •  Transmission oil temperature gauge
                            •  Air system pressure gauge
                            •  Brake oil temperature gauge
                            •  Coolant temperature gauge
                            •  Hour meter
                            •  Tachometer
                            •  Engine overspeed indicator
                            •  Fuel level, gauge
                            •  Speedometer with odometer
                            •  Transmission gear indicator
                            •  Hoist lever
                            •  Horn
                            •  Load counter, automatic
                            •  Mirrors, left and right
                            •  ROPS cab, insulated/sound suppressed
                            •  Seat, Caterpillar comfort, full air suspension and retractable four point seat belt with shoulder harness
                            •  Seat, trainer with lap belt
                            •  Steering wheel, padded/tilt/telescopic
                            •  Storage compartment
                            •  Sun visor
                            •  Throttle lock
                            •  Right side access door
                            •  Left side power window
                            •  Windshield wiper, intermittent, and washer
                            •  Tinted, laminated glass
                          • GUARDS
                            •  Engine crankcase
                            •  Driveline, operator safety vandalism protection lock
                          • Engine crankcase
                            • Driveline, operator safety vandalism protection lock
                              • FLUIDS
                                •  Extended life coolant to –35° C (–30° F)
                              • OTHER STANDARD EQUIPMENT
                                •  Airline dryer
                                •  Body mounting group
                                •  Body safety pin (secures body in up position)
                                •  Body down indicator
                                •  CD ROM parts book
                                •  Center mounted rims
                                •  Ground level battery disconnect
                                •  Ground level engine shutdown
                                •  Ground level grease fittings
                                •  Reservoirs<ul><li>Transmission</li><li>Steering</li><li>Brake, converter and hoist</li></ul>
                                •  Rims 19.5 × 49
                                •  Rock ejectors
                                •  Supplemental steering, automatic
                                •  Tie down eyes
                                •  Tow hooks (front)/tow pin (rear)
                              • Airline dryer
                                • Body mounting group
                                  • Body safety pin (secures body in up position)
                                    • Body down indicator
                                      • CD ROM parts book
                                        • Center mounted rims
                                          • Ground level battery disconnect
                                            • Ground level engine shutdown
                                              • Ground level grease fittings
                                                • Reservoirs
                                                  • Transmission
                                                  • Steering
                                                  • Brake, converter and hoist
                                                  • Rims 19.5 × 49
                                                    • Rock ejectors
                                                      • Supplemental steering, automatic
                                                        • Tie down eyes
                                                          • Tow hooks (front)/tow pin (rear)

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