777D Off-Highway Truck

Overview

Specifications

Benefits & Features

Standard / Optional Equip.

Overview

777D Off-Highway Truck

Engineered for performance, designed for comfort, built to last.
Specifications

Engine

Weights – Approximate

Operating Specifications

Transmission

Final Drives

Brakes

Body Hoists

Capacity – Dual Slope – 100% Fill Factor

Capacity – Flat Floor – 100% Fill Factor

Capacity – Flat Floor Lined – 100% Fill Factor

Capacity – Quarry Flat Floor – 100% Fill Factor

Weight Distributions – Approximate

Suspension

Approximate Weights – Quarry Flat Floor

Approximate Weights – Dual Slope

Approximate Weights – Dual Slope Lined

Approximate Weights – Dual Slope Rubber Liner

Approximate Weights – Flat Floor

Approximate Weights – Flat Floor Lined

Service Refill Capacities

Tires

ROPS

Sound

Steering

Dimensions

Capacity – Quarry Flat Floor Lined – 100% Fill Factor

Capacity – X Body – 100% Fill Factor

Capacity – Coal Bodies – 100% Fill Factor

Benefits & Features
Power Train - Engine
The Cat 3508B engine is built for power, reliability and efficiency for superior performance in the toughest applications.
» Learn More


Power Train - Transmission
Cat power train delivers more power to the ground for greater productivity and lower operating costs.
» Learn More


Engine/Power Train Integration
Electronically combines critical power train components to work more intelligently to optimize overall truck performance.
» Learn More


Specifications

Benefits & Features

Engine

The Cat 3508B EUI twin turbocharged and aftercooled diesel engine delivers high power and reliability in the world's most demanding applications. The 3508B is an eight-cylinder, four-stroke design that uses long, effective power strokes for more complete fuel combustion and optimum efficiency.

Fuel Efficiency

The 3508B EUI has two percent improved specific fuel consumption over the former 3508 EUI engine.

EPA Compliant

The 3508B engine meets the U.S. Environmental Protection Agency Tier I emissions standards.

Starting System

Features a direct-electric, 24-volt starting system with a 100-amp alternator and four 190-amp-hour, low maintenance, high output, 12-volt batteries for dependable starting.

Altitude Compensation

Designed for maximum operating efficiencies at altitudes under 2228 m (7,500 ft).

High Torque Rise

The 23 percent torque rise provides unequalled lugging force during acceleration, on steep grades and in rough underfoot conditions. Torque rise effectively matches transmission shift points for maximum efficiency and fast cycle times.

Enhanced Life

High displacement, low rpm rating and conservative horsepower ratings mean more time on the haul roads and less time in the shop.

Two-Piece Piston Design

Two-piece articulated pistons with a deep bowl, low volume crevice design enhances combustion efficiency, improves fuel efficiency and lowers emissions.

Electronic Unit Injection (EUI)

The electronically controlled unit injection fuel system senses operating conditions and regulates fuel delivery for optimum fuel efficiency. The proven high-pressure fuel system provides improved response times and more efficient fuel burn with lower emissions and less smoke.

Electronic Control Module (ECM)

ECM utilizes advanced engine management software to monitor, control and protect the engine utilizing self-diagnosing electronic sensors. The computerized system senses operating conditions and power requirements and adjusts engine for peak performance and most efficient operation and at all times.

Separate Circuit Aftercooler

Allows the aftercooler circuit to operate cooler than jacket water temperature for a denser air charge and greater combustion.

Engine Protection

Computerized system electronically protects the engine during cold starts, high altitude operation, air filter plugging, and high exhaust temperature.

Exhaust Diverter (optional)

Unique muffler/exhaust design transfers heat to the truck body to keep materials from sticking in cold climates. When in the lowered position, the diverter routes the exhaust through the body; when raised, exhaust is diverted through the muffler.
Power Train - Engine
The Cat 3508B engine is built for power, reliability and efficiency for superior performance in the toughest applications.
» Learn More


1) Transmission

The Cat seven-speed planetary power shift transmission is matched with the direct-injection 3508B diesel engine to deliver constant power over a wide range of operating speeds.

Robust Design

Designed for the higher horsepower of the 3508B engine, the proven planetary power shift transmission is built tough for long life between overhauls.

Transmission Chassis Control (TCC)

TCC uses electronically transferred engine rpm data to execute shifts at preset points for optimum performance, efficiency and clutch life.

2) Lock-Up Torque Converter

Combines maximum rimpull and the cushioned shifting of torque converter drive with the efficiency and performance of direct drive. Engages at approximately 6.4 km/h (4 mph), delivering more power to the wheels.

3) Final Drives

Cat final drives work as a system with the planetary power shift transmission to deliver maximum power to the ground. Built to withstand the forces of high torque and impact loads, double reduction final drives provide high torque multiplication (19.16:1) to further reduce drive train stress.

Axles

Full floating axles are shot peened to relieve internal stresses and increase durability. Rolled splines also provide increased service life.

Wheels and Rims

Cast rear wheels and Cat center-mount rims are mounted using studs and nuts to minimize maintenance and maximize durability.

Steering System

Hydraulic steering control system is designed for exceptional smoothness and precise control. A separate circuit prevents cross contamination for long life.
Power Train - Transmission
Cat power train delivers more power to the ground for greater productivity and lower operating costs.
» Learn More


Cat Data Link

Electronically integrates machine computer systems to optimize overall power train performance, increase reliability and component life and reduce operating costs.

Economy Mode

Using the Electronic Technician (Cat ET) service tool, the mechanic can reduce the engine setting to 920 gross horsepower to match loader/crusher availability and conserve fuel.

Transmission Chassis Control (TCC)

TCC uses electronically transferred engine rpm data to execute shifts at preset points for optimum performance efficiency and clutch life. The transmission chassis controller provides integrated functionality, to the following electronic controls:

Electronic Technician (ET)

Cat ET service tool provides service technicians with easy access to stored diagnostic data through the Cat Data Link to simplify problem diagnosis and increase machine availability.
  • Cat ET displays the status of all engine parameters, including throttle position, timing and fuel flow.
  • Cat ET replaces 13 mechanical tools to perform functions like cylinder cutout checks, injector solenoid tests and timing calibration.

Electronic Monitoring System (EMS III)

EMS III allows the operator to view requested information and utilizes a three-category warning system to alert the operator of abnormal machine conditions. Data can be downloaded via the Electronic Technician (ET) service tool for quick diagnosis and repair.

Optional Attachments

Caterpillar offers optional braking controls that are electronically integrated with the Cat Data Link to enhance retarding, traction and braking performance:
Engine/Power Train Integration
Electronically combines critical power train components to work more intelligently to optimize overall truck performance.
» Learn More


Integrated Braking System

The Cat oil-cooled braking system delivers reliable performance and control in the most extreme haul road conditions. The integrated system combines the service, secondary, parking brake and retarding functions in the same robust system for optimum braking efficiency.

Rear Oil-Cooled Multiple Disc Brakes

Caterpillar rear-wheel, forced oil-cooled, multiple disc service brakes are continuously cooled by water-to-oil heat exchangers for exceptional, non-fade braking and retarding performance.

Brake Design

Cat oil-cooled disc brakes are designed with large discs and plates for reliable, adjustment-free operation and performance. Brakes are completely enclosed and sealed to prevent contamination and reduce maintenance.

Dry Front Caliper Disc Brakes

Disc brakes fitted on front wheels as standard fitment.

Pistons

The Caterpillar two-piston design combines the service, secondary, parking brake and retarding functions in the same system. The primary piston hydraulically actuates both service and retarding functions. The secondary piston is spring-applied and held in the disengaged position by hydraulic pressure. If hydraulic system pressure drops below a specified level, the spring-applied secondary piston automatically applies the brakes.

Parking Brake

Oil-cooled, spring-applied, hydraulically released parking brake is applied to rear wheels for superior parking capability on all grades up to 15 percent.

Automatic Retarder Control (ARC) (optional)

ARC electronically controls braking on grade to maintain engine at approximately 1900 RPM (adjustable from 1850-1950 RPM in increments of 10). ARC is deactivated when the operator applies the brakes or throttle.

Traction Control System (TCS) (optional)

TCS 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 oil-cooled disc brakes engage to slow the spinning wheel. Torque is then automatically transferred to the wheel with better traction.

Integrated Braking Control (IBC) (optional)

IBC combines Automatic Retarder Control (ARC) and Traction Control System (TCS) into one integrated brake control system for optimum efficiency, performance and reliability.

Cat Data Link

All control modules communicate via the Cat Data Link and work together as an integrated system to maximize production efficiency and extend component life.
Brake System
Reliable braking with superior control gives the operator the confidence to focus on productivity.
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Box-Section Design

The 777D frame uses a box-section design, incorporating two forgings and 22 castings in high stress areas with deep penetrating and continuous wrap-around welds to resist damage from twisting loads without adding extra weight.

Integral Four-Post ROPS Cab

Resiliently mounted to the main frame to reduce vibration and sound, the integral ROPS structure is designed as an extension of the truck frame. The ROPS/FOPS structure provides "five-sided protection" for the operator.

Steering and Suspension System

Cat integrated steering and suspension system is designed for precise steering, excellent maneuverability with minimal tire wear and superior ride control to optimize operator comfort all shift long.

Steering System

A twin double-acting cylinder steering system is designed to deliver precise control under all loading and underfoot conditions. The steering system is separate from the main hydraulic system to prevent cross-contamination and overheating from other sources.

Suspension System

Designed to dissipate haul road and loading impacts for longer frame life and a more comfortable ride.

Ride Control

Built-in rebound control and strategically located cab relative to the front axle minimizes the effect of pitch and bounce, resulting in a more comfortable ride, higher productivity and less fatigue.
Structures
Rugged Cat structures are the backbone of the 777D off-highway truck's durability.
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Ergonomic Layout

The 777D operator station is ergonomically designed for total machine control in a comfortable and productive environment. All controls, levers switches and gauges are positioned to maximize productivity and minimize operator fatigue.

1) Dash

Wrap-around dash puts all controls within each reach of the operator. Backlit displays enhance visibility.

2) Air Suspension Seat

Ergonomically designed, fully adjustable Cat Comfort Air Suspension Seat with adjustable armrests provides optimal driving comfort. A wide, retractable seat belt provides a secure, comfortable restraint.

3) Steering Column

Sport wheel with tilt and telescopic steering provides a comfortable driving position and greater control.

4) Transmission Console

Ergonomic gear shift lever with backlit gear indicators optimize efficiency.

5) Viewing Area

Designed for excellent all-around visibility and clear sight lines to the haul road, the large viewing area enables the operator to maneuver with confidence for greater productivity.

6) ROPS/FOPS Cab

Integral, sound-suppressed cab is resiliently mounted to the mainframe to isolate the operator from sound and vibration for a quiet, secure and comfortable ride.

7) Operator Controls

Easy to reach turn signal, high beam, windshield wiper/washer, and retarder controls are designed for optimum efficiency and comfort.

8) Storage Compartment

Large compartment located under the trainer seat provides an uncluttered working environment.

9) Trainer Seat

Full-size, fully padded trainer seat features a backrest, wide hip and shoulder room, and seat belt for secure travel.

10) Monitoring System

Electronic Monitoring System (EMS III) features easy-to-read displays for precise machine status information. Data can be downloaded via the Electronic Technician (Cat ET) service tool for quick diagnosis and repair.
  • Gauge Cluster maintains a constant display of vital machine functions, including: coolant temperature, oil temperature, brake air pressure, and fuel level.
  • Speedometer/Tachometer Module monitors three systems: engine speed, ground speed and actual gear.
  • Message Center displays messages requested by operator and advises operator of abnormal machine conditions.

11) Heating/Air Conditioning

Electronically controlled four-speed fan and nine vents deliver temperature-controlled air circulation for a comfortable working environment in any climate. (optional)

12) Foot Pedals

Ergonomically designed for comfort. Secondary brake pedal is conveniently located on the floor for easy operator control.

13) Operator Window

Powered operator window offers simple operation and an unobstructed view.

14) Hoist Levers

Four-position electronic hoist system with fingertip control provides low impact body-down snubbing. Mounted next to the operator's seat for ease of operation.

15) Truck Production Management System (TPMS) (optional)

TPMS provides valuable payload and cycle time data to improve productivity. 
  • Utilizes strut pressure sensors and on-board microprocessor to determine payload weight.
  • Delivers consistent, accurate payloads and improves efficiency by minimizing overloading and underloading.
  • External lights signal loading tool operator when payload is reached.
  • On-board computer stores up to 1,400 cycles for analysis of payload weight, cycle times, distances, and actual cycle dates and times.
  • System is accurate within ±5% under normal loading conditions over a normal shift.

Radio Ready

Cab is prewired with power converter, speakers, wiring harness, antenna and provision for add-on communication systems.

Product Link Ready

Optional Product Link system provides a two-way communication flow of vital machine data and location information between the dealer and the customer. Product Link provides updates on service meter hours, machine condition, machine location as well as integrated mapping/route planning.
Operator's Station
Ergonomically designed for operator comfort, superior control and high productivity.
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Body/Chassis Integration

Caterpillar truck bodies are designed and matched with the integrated chassis system for optimum structural reliability, durability and long life.

Electronic Hoist Control

Provides the operator with better control of the load when dumping, including over-center load control and modulated control throughout the operating range. The automatic body snubbing feature reduces impact on the frame, hoist cylinders and operator.

Fast Hoist Cycle Times

Two-stage hoist cylinders provide fast dump cycle times of 15 seconds for raise and 13 seconds for lower.

Body Design

Cat truck bodies are designed for optimal strength, capacity and durability. Wear surfaces are equipped to handle even the toughest impact and abrasion over the long haul without diminishing capacity.
  • Five-Sided Beams join the sidewall and floor junctions for increased body rigidity and strength.
  • Wide Ribs in body floor provide increased durability and impact support.
  • Full-Length Stringers create strength and rigidity throughout the bed.
  • Box Section Beams offer increased durability in the floor, sidewall, top rail, corner, and cab canopy areas.
  • Wide Body Design provides complete coverage of tires, eliminating the need for rock deflectors.

Dual-Slope Body

The advanced dual-slope body design with V-shaped floor increases load retention, maintains a low center of gravity, reduces shock loading, and maintains optimum load distribution on steep inclines and in challenging haul road conditions. 
  • Reinforced, rolled steel top rail increases body strength and protects the body from damage caused by the loading tool or falling material
  • 8 degree "V" reduces shock loading and centers the load.
  • 10 degree forward body slope and 18 degree ducktail slope helps retain loads on steep grades.
  • Maintains a load height of 4380 mm (14 ft 3 in) for faster, more confident loading.
  • 60.1 m3 (78.6 yd3) capacity allows operators to achieve rated payload in 2900 lb/BCY material.

Body Liners

Liner options are available to save weight and help extend the body system's life. Wear surfaces and liners are equipped to handle tough impact loads while resisting abrasion. Wear plates deliver long life in high wear areas.
Truck Body Systems
Cat designed and built for rugged performance and reliability in the toughest hauling applications.
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Efficient Combination

The 777D is designed to deliver full payloads and fast cycle times. When properly matched, Cat trucks and loading tools create an efficient combination to maximize volume of material moved at the lowest operating cost.

Machine Configuration Options

Choose from various truck configuration options to match specific site and hauling conditions.

Tire Options

Choose from a range of tire options to match specific underfoot conditions, haul road conditions and hauling distances to maximize performance and extend tire life.

Systems Approach

The Caterpillar systems approach means increased efficiencies through common design. Cat haul trucks, loaders and excavators use common engines, parts and operator environments which add up to more uptime, greater productivity and lower maintenance costs.

Loader Match

Designed to work as an optimum pass/match system, the 777D is best sized to match the following Caterpillar loading tools: Wheel Loaders
  • 990 II — 6 pass/match
  • 992G — 4 pass/match

Matched Systems
An efficient loading/hauling system starts with a perfect match.
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Servicing Ease

Easy access to daily service points simplifies servicing and reduces time spent on regular maintenance procedures. Enhanced serviceability and extended service intervals are designed to increase machine availability and productivity.

Maintenance Platform

Provides access to engine, air filters, steering hydraulic tank and battery compartment.

In-Frame Access

Permits easy access to major components for easy servicing and removal.

Ground-Level Access

Allows convenient servicing to tanks, filters, drains, battery disconnect and engine shutdown.

Fast Fill Service Center (optional)

Wiggins fast fill service center features high speed fuel and oil exchange.

Scheduled Oil Sampling

S•O•SSM sampling valves speed sampling and analysis reliability.

Pressure Test Points

Disconnect valves are conveniently located throughout the hydraulic systems for easy pressure testing.

Air Filters

Radial seal air filters are easy to change, reducing time required for air filter maintenance.

Sealed Electrical Connectors

Electrical connectors are sealed to lock out dust and moisture. Harnesses are braided for protection. Wires are color coded for easy diagnosis and repair.

Spin-on Filters

Spin-on filters for fuel and oil systems reduce changing time and help assure clean, tight seals.

On-Board Diagnostic Systems

EMS III continuously checks all critical machine functions and components, and helps locate faults quickly for faster repair. Electronic control system enables quick diagnosis of engine conditions and effective maintenance and repairs utilizing the Electronic Technician (ET) service tool.
Serviceability
Less time spent on maintenance means more more time on the haul roads.
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Machine Selection

Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production.

Purchase

Look past initial price. Consider the financing options available, as well as day-to-day operating costs. This is also the time to look at dealer services that can be included in the cost of the machine to lower equipment owning and operating costs over the long run.

Financing

Your dealer is an expert at arranging affordable financing options for all Caterpillar products.

Product Support

You will find nearly all parts at your dealer parts counter. Cat dealers use a worldwide computer network to locate in-stock parts to minimize machine downtime. Save money with Cat Reman parts. Receive the same warranty and reliability as new products at a savings of 40% to 70%.

Literature Support

Operation and maintenance manuals are easy to use, helping you get the full value of your equipment investment.

Customer Support Agreements

Cat dealers offer a variety of product support agreements, and work with customers to develop a plan that meets specific needs. Plans can cover the entire machine, including attachments, to help protect your investments.

Operation

Improving operating techniques can boost your profits. Your Cat dealer has training videotapes, literature and other ideas to help you increase productivity.

Replacement

Repair, rebuild or replace? Your Cat dealer can help you evaluate the cost involved so you can make the right choice.

www.CAT.com

For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.CAT.com.
Customer Support
Caterpillar dealers have what it takes to keep haul trucks productive.
» Learn More


Standard / Optional Equip.

777D Standard Equipment

Air Line Dryer
Alternator (100-amp)
Alarm, Back-up
Batteries, 190-amp hour, 12-volt (4)
Battery Disconnect Switch, ground level
Body Mounting Group
Body Safety Pins
Body Up Reverse Inhibitor
Braking System
Brake Disconnect Switch, front
Brake Heat Exchanger
Brake Release Motor for Towing
Oil-Cooled Multiple Disc Brakes (rear)
Parking Brake
Retarder
Secondary Brake
Cab, ROPS
Coat Hook
Diagnostic Connector Port, 24-volt
Electronic Monitoring System III
Hoist Lever, finger tip-actuated
Horn, air
Insulated and Sound-Suppressed
Power Port, 24-volt
Product Link Ready
Radio Ready, 5-amp converter, speakers, antenna, wiring
Seat, Caterpillar Comfort, full air suspension
Seat Belts, 75 mm (3 in) wide retractable
Seat, Passenger
Steering Wheel, tilt, padded, telescopic
Storage Compartment
Sun Visor
Tinted Glass
Window, electric (operator)
Coolant, Extended Life, -35°C (-30°F)
Crankcase Guard
Driveline Guard
Electrical System, 24-volt
Engine
Cat 3508B Electronic Unit Injection
8-Cylinder Diesel
Turbocharged
Aftercooled
Air Cleaner with Precleaner (2)
Automatic Cold Mode Idle Control
Electric Start
Engine Shutdown Switch, ground level
Starting Aid, Ether
Filters, Spin-on
Gauges
Actual Gear Indicator
Air Cleaner Service Indicator
Air Pressure
Body Down Indicator
Brake Oil Temperature
Coolant Temperature
Engine Overspeed Indicator
Fuel Level
Hour Meter
Load Counter, automatic
Odometer
Speedometer
Tachometer
Lighting System
Auxiliary Jump Start Receptacle
Back-up Lights
Directional Signals and Hazard Warning, LED
Dome/Courtesy Light
Headlights, Halogen, with dimmer
Stop and Tail Lights, LED
Mirrors, right/left
Reservoirs (separate)
Brake/Converter/Hoist
Steering
Transmission/Torque Converter
Rims, 19.5 x 49
Rock Ejectors
Service Platform, bolt-on
Supplemental Steering, automatic
Tires, 27.00-R49, radial
Tow Hooks, front
Tow Pin, rear
Transmission
7-Speed Automatic Power Shift, electronic control
Body-up Shift Limiter
Controlled Throttle Shifting
Directional Shift Management
Downshift/Reverse Shift Inhibitor
Economy Shift Mode
Engine Overspeed Protection
Reverse Neutralizer During Dumping
Neutral Coast Inhibitor
Neutral Start Switch
Programmable Top Gear Selection
Vandalism Protection Locks
Windshield Wipers and Washer, electric intermittent

777D Optional Equipment

Air Conditioning
Automatic Retarder Control (ARC), dry
Body Tail End Liner
Dual Slope
Fuel Fast Fill Adaptor
Fuel Tank
Integrated Braking Control (IBC), dry
Combines Traction Control System (TCS) and Automatic Retarder Control (ARC) into one system.
Lubrication Group - Automatic
Muffler
Muffler/Exhaust Diverter
Wiggins Service Center
 

About Cat

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Our Company

Caterpillar is the world's leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives.