Cat 777G Off-Highway Truck – 100-Ton Performance, Durability and Operator Confidence
The Cat 777G Off-Highway Truck represents the benchmark for 100-ton class mechanical haul trucks, engineered to deliver maximum productivity, durability, and operating efficiency in the world’s most demanding mining and quarrying applications. Designed with direct input from operators, site managers, and maintenance teams, the 777G is built to move more material faster, more safely, and at a lower cost per tonne.
With a target payload of 91.7 tonnes, the Cat 777G is purpose-built to sit at the heart of high-production haulage operations. Whether operating in hard rock, coal, overburden, or aggregate applications, the truck is designed to deliver consistent performance across variable haul profiles, uneven ground, and steep gradients while maintaining excellent stability and material retention.
At the core of the Cat 777G is the proven Cat C32B engine, delivering the power and torque required to maintain productivity under load. This engine is paired with advanced drivetrain and traction control technologies that allow the truck to achieve a top speed of 65.9 km/h when fully loaded, improving cycle times without compromising durability or fuel efficiency. Increased travel speeds and refined traction control allow operators to move material more efficiently across the site, even in challenging ground conditions.
Fuel efficiency is a key advantage of the Cat 777G, supported by Adaptive Economy Mode, which automatically balances engine output with haul conditions. This technology reduces fuel consumption while maintaining productivity, helping operations lower overall operating costs and emissions without sacrificing output. The result is a truck that delivers more tonnes per litre across a wide range of applications.
Operator comfort and confidence are central to the design of the 777G. The left-side seat placement improves visibility to the work area and haul road, allowing operators to maintain better awareness throughout the shift. Enhanced cab ergonomics reduce fatigue, support longer operating hours, and contribute to safer, more consistent performance. The cab environment is designed to work in harmony with advanced safety and monitoring technologies, giving operators greater control and situational awareness.
Safety is deeply integrated into the Cat 777G design. An improved access system provides secure entry and exit, reducing the risk of slips and falls in wet, muddy, or uneven conditions. Optional visibility enhancements, including high-intensity discharge lighting, convex mirrors, and full visibility packages that meet ISO 5006:2017 requirements, further enhance site safety. The optional Work Area Vision System uses cameras to improve visibility around the machine, supporting safer operation in congested or low-visibility environments.
Technology plays a vital role in maximising productivity and equipment utilisation. The Cat 777G supports advanced monitoring systems including Truck Production Management System functionality, fluid level monitoring, and payload performance tracking. Productivity metrics such as Tons Kilometre Per Hour and Tons Mile Per Hour provide valuable insight into haul efficiency and machine performance, helping operations optimise haul routes and loading practices.
Advanced object detection technology is available, combining four cameras and four radar units to improve operator awareness of surrounding equipment and personnel. This technology supports safer operation in high-traffic work zones and contributes to reduced incident risk across the site. The optional Traction Control System enhances control on poor ground conditions, improving tyre life and maintaining productivity in wet, loose, or uneven terrain.
The Cat 777G is designed with application versatility in mind. Multiple body configurations are available to suit different materials and site requirements. A dedicated coal body option offers varying capacities optimised for lightweight materials. For haul profiles that include steep slopes, the optional Dual Slope body provides excellent material retention, reducing carryback and spillage. The X body, with its flat floor design, is ideal for controlled material metering, particularly when feeding crushers or processing plants.
In high-impact, hard rock applications, body protection options extend machine life and reduce repair costs. Optional rubber body liners are available for Dual Slope and X bodies, protecting the truck body from impact damage and reducing noise while improving material flow. Body heat systems, sideboards, and liners further tailor the machine to specific site conditions and production requirements.
Durability is a defining characteristic of the Cat 777G. The truck is engineered to withstand extreme loads, harsh environments, and continuous operation. Structural components, drivetrain systems, and suspension are designed for long service life, reducing downtime and extending maintenance intervals. Optional features such as cold weather packages and cab precleaners ensure reliable operation across a wide range of climates and environments.
Maintenance efficiency is another core strength of the 777G platform. Integrated service features such as the fluid fill service center simplify routine maintenance and reduce service time. Optional spare rims, wheel chocks, and engine braking systems further support uptime and safe operation. Reduced maintenance costs, combined with fuel efficiency improvements, contribute to lower total cost of ownership over the life of the machine.
The Cat 777G supports a wide range of optional equipment to match operational needs, including body heat, body liners, body sideboards, high-intensity discharge lighting, convex mirrors, visibility packages, wheel chocks, and engine braking systems. Operator environment enhancements include fluid level monitoring and integrated production management tools, ensuring operators and maintenance teams have access to real-time machine data.
Designed, manufactured, and supported by Caterpillar’s global dealer network, the Cat 777G offers dependable performance backed by world-class service and parts availability. Equipment configurations, standard features, and optional packages may vary by region, and consultation with an authorised Cat dealer ensures the truck is tailored precisely to site requirements.
The Cat 777G Off-Highway Truck stands as one of the most efficient and capable 100-ton mechanical haul trucks in the industry. With its combination of payload capacity, speed, fuel efficiency, operator comfort, advanced technology, and application versatility, it is engineered to deliver measurable productivity gains and long-term value in mining, quarrying, and heavy earthmoving operations.
Cat® 777G Off-Highway Truck – Full Technical & Option Specification Sheet
Machine Classification
Mechanical drive off-highway haul truck in the 100-ton class, designed for mining, quarrying, and large earthmoving operations.
Target Payload
91.7 tonnes at 100% nominal payload rating.
Engine
Cat C32B diesel engine.
V12 configuration.
Displacement 32.1 litres.
Gross power approximately 1,025 horsepower.
Net power approximately 916 horsepower.
High torque output optimised for heavy haulage and gradeability.
Turbocharged and aftercooled.
Electronic engine management with adaptive economy mode.
Transmission
Fully automatic powershift transmission.
Seven forward speeds.
One reverse speed.
Electronic clutch pressure control.
Adaptive shift logic based on load, speed, and grade.
Top Speed
Approximately 65.9 km/h when fully loaded.
Drivetrain
Mechanical drive with torque converter.
Planetary final drives.
Heavy-duty differential and axle assemblies designed for continuous high load cycles.
Braking System
Oil-cooled multiple disc service brakes on all wheels.
Automatic retarding control.
Integrated engine brake option.
Secondary and parking brake systems integrated into driveline.
Designed to maintain braking performance under high heat and heavy load.
Steering
Hydraulic steering system.
Load-sensing design for precise control.
Emergency steering capability.
Suspension
Hydropneumatic suspension cylinders.
Independent front suspension with rear axle oscillation.
Designed for ride comfort and stability on uneven haul roads.
Frame and Chassis
High-strength steel frame.
Designed to resist torsional loads and impact stress.
Engineered for long service life in high-cycle operations.
Operator Cab
ROPS-certified enclosed cab.
Left-side seat configuration.
Air-suspension operator seat.
Tilt and telescopic steering wheel.
Low noise interior with climate control.
Excellent forward and side visibility.
Instrumentation and Controls
Electronic operator display.
Integrated machine monitoring and diagnostics.
Load and production monitoring capability.
Fuel consumption and performance tracking.
Fuel Capacity
Large-capacity fuel tank suitable for extended shifts.
Serviceability
Ground-level access to daily service points.
Centralised fluid fill and drain points.
Designed for reduced service time and lower maintenance cost.
Standard Body Options
X body with flat floor for crusher feeding and metered dumping.
Dual Slope body for steep haul profiles and improved material retention.
Coal body options for lightweight material with increased volume.
Optional Body Enhancements
Rubber body liners for impact protection.
Steel body liners.
Sideboards.
Body heating system for cold or sticky materials.
Tyres
27.00R49 radial tyres standard.
Configured to meet TKPH/TMPH requirements for haul profile.
Safety Systems
Improved access system with secure handrails and steps.
Slip-resistant surfaces.
High-visibility lighting packages available.
Wheel chocks and site safety accessories optional.
Technology Options
Truck Production Management System.
Fluid level monitoring.
TKPH/TMPH monitoring.
Work Area Vision System with cameras.
Object detection system using cameras and radar.
Traction Control System for poor ground conditions.
Environmental Adaptation
Cold weather packages available.
Cab precleaner for dusty environments.
Designed for operation across wide temperature ranges.
FAQ: Cat 777G Off-Highway Truck
- What class of truck is the Cat 777G?
The Cat 777G is a 100-ton class mechanical off-highway haul truck designed for mining and large earthmoving applications. - What payload can the 777G carry?
Its nominal target payload is 91.7 tonnes, with operational flexibility depending on site policies. - What engine powers the 777G?
It is powered by the Cat C32B V12 diesel engine. - Is the 777G mechanical or electric drive?
The 777G uses a mechanical drive system. - What is the top speed when loaded?
The truck can reach approximately 65.9 km/h when fully loaded. - Is the 777G suitable for steep haul roads?
Yes, especially when equipped with the Dual Slope body and traction control system. - How does Adaptive Economy Mode help fuel efficiency?
It adjusts engine output automatically to reduce fuel consumption while maintaining productivity. - What makes the 777G fuel efficient for its size?
Efficient engine tuning, adaptive transmission logic, and reduced parasitic losses. - Is the operator cab comfortable for long shifts?
Yes, it is designed for all-day comfort with air suspension seating and ergonomic controls. - Why is the seat positioned on the left side?
Left-side seating improves visibility to the loading area and haul road edge. - What safety features are standard?
ROPS cab, secure access system, oil-cooled brakes, and integrated monitoring systems. - Can visibility be enhanced further?
Yes, with optional lighting packages, cameras, and vision systems. - What types of bodies are available?
X body, Dual Slope body, and coal bodies in various capacities. - Which body is best for crusher feeding?
The X body with a flat floor is ideal for metered material flow. - Which body works best for lightweight material?
Coal bodies with increased volumetric capacity. - Are rubber liners available?
Yes, for high-impact or abrasive material applications. - How is braking handled on long downhill hauls?
Through automatic retarding control and optional engine braking. - What tyre size does the 777G use?
27.00R49 radial tyres are standard. - Can tyre life be monitored?
Yes, using TKPH/TMPH monitoring systems. - Is the 777G suitable for cold climates?
Yes, with optional cold weather packages and body heat systems. - How easy is routine maintenance?
Daily service points are accessible from ground level. - Does it support production tracking?
Yes, through integrated production management systems. - Can the truck detect nearby objects or vehicles?
Yes, with optional object detection using cameras and radar. - Is traction control available?
Yes, to improve grip and reduce tyre slip. - How durable is the chassis?
The frame is engineered for high stress, impact, and long service life. - What industries typically use the 777G?
Mining, quarrying, large construction, and bulk earthmoving. - Can it operate in dusty environments?
Yes, with optional cab precleaners and filtration systems. - Is the 777G suitable for high-cycle operations?
Yes, it is designed for continuous heavy-duty use. - Does it support fleet management systems?
Yes, it integrates with Caterpillar fleet and monitoring technologies. - How does the suspension improve ride quality?
Hydropneumatic suspension absorbs shock and maintains stability. - What transmission does it use?
A fully automatic seven-speed powershift transmission. - Is reverse speed limited for safety?
Yes, reverse speed is lower than forward gears for controlled operation. - Can it be customised for specific sites?
Yes, through extensive optional equipment and body configurations. - How does it handle uneven terrain?
Rear axle oscillation and suspension design maintain tyre contact. - Is operator fatigue considered in the design?
Yes, cab ergonomics and visibility reduce fatigue. - Can lighting be upgraded for night work?
Yes, high-intensity lighting packages are available. - How is fluid monitoring handled?
Optional systems provide real-time fluid level data. - Does it support remote diagnostics?
Yes, through integrated machine monitoring systems. - Is the 777G compatible with safety standards?
Yes, it is designed to meet global off-highway safety requirements. - What materials can it haul?
Rock, ore, coal, overburden, aggregate, and processed material. - How does it reduce operating costs?
Through fuel efficiency, reduced maintenance time, and long component life. - Is training required for operators?
Yes, due to machine size and capability, professional training is recommended. - Can it be rebuilt or overhauled?
Yes, major components are designed for rebuildability. - How long is its typical service life?
Service life depends on duty cycle but is designed for long-term operation. - Does it support site-specific speed control?
Yes, through electronic controls and fleet management systems. - Can braking performance degrade under heat?
Oil-cooled brakes are designed to maintain consistent performance. - Is it suitable for mixed fleet operations?
Yes, it integrates well with other Cat loading and hauling equipment. - Can productivity be measured per haul cycle?
Yes, via load counters and production monitoring. - Does it reduce spillage during hauling?
Yes, body design and retention features minimise material loss. - Who is the 777G best suited for?
Operations requiring reliable, high-capacity mechanical haulage with proven durability and advanced operator support.
