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Catalog excerpts

777D - 1

Operating Specifications Nominal Payload 90.4 tonnes 100 tons • Refer to the Caterpillar® 10/10/20 Payload Guidelines. Weights - Approximate Target Gross Machine 163 360 kg 360,143 lb Operating Weight

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777D - 2

777D Off-Highway Truck Engineered for performance, designed for comfort, built to last. Power Train – Engine Power Train – Transmission Engine/Power Train Integration The Cat 3508B EUI engine delivers the power and reliability necessary to perform in the most demanding applications. Designed for efficient operation, the 3508B offers excellent fuel efficiency, lower emissions, reduced engine noise and lower operating costs. pg. 4 The Cat seven-speed power shift transmission, matched with the 3508B electronic unit injection engine, provides consistent power and efficiency over a wide...

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777D - 3

Brake System Cat rear oil-cooled, multiple disc brakes offer exceptional, fade-resistant braking and retarding for maximum performance and productivity in all haul road conditions. Optional Automatic Retarder Control and Traction Control Systems provide optimum braking efficiency. pg. 8 Caterpillar truck frames are built to resist twisting in the most severe, high impact applications. Mild steel provides flexibility, durability and resistance to impact loads. Castings and forgings in high stress areas provide exceptional strength and durability for long life. pg. 10 The ergonomic cab is...

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777D - 4

Power Train – Engine The Cat 3508B engine is built for power, reliability and efficiency for superior performance in the toughest applications. 1 Electronic Unit Injection 2 Two-Piece Pistons 3 Separate Circuit Aftercooler 4 Valve Rotators 5 Oil Cooler 6 Self-Aligning Roller Followers 7 Steel-Backed Copper Bonded Bearings 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 eightcylinder, four-stroke design that uses long, effective power strokes for more complete fuel...

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777D - 5

Power Train – Transmission Cat power train delivers more power to the ground for greater productivity and lower operating costs. 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. Long Life. A dedicated oil tank and circuit provides cooler, cleaner oil for maximum performance and longer...

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777D - 6

Engine/Power Train Integration Electronically combines critical power train components to work more intelligently to optimize overall truck performance. 1 Electronic Technician 2 CAT Data Link 3 Sensors 4 Engine Control Module (ECM) 5 Transmission Chassis Control (TCC) 6 Automatic Retarder Control (ARC) Traction Control System (TCS) 6 Integrated Brake Control (IBC) 7 Electronic Monitoring System (EMS III) Display 8 Transmission 9 Oil-Cooled Rear Brakes 10 Oil-Cooled Front Brakes (if equipped) Cat Data Link. Electronically integrates machine computer systems to optimize overall power train...

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777D - 7

• Overspeed Protection. The transmission control electronically senses engine conditions and automatically up-shifts one gear to prevent overspeeding. If overspeeding occurs in top gear, the lock-up clutch is disengaged. 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. • Programmable Top Gear. Transmission top gear maximum can be set using the...

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777D - 8

Brake System Reliable braking with superior control gives the operator the confidence to focus on productivity. 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, springapplied,...

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777D - 9

Service Brake Sensor Engine Sensor ARC ARC Switch Brakes Service Brakes Axle Speed Sensor TCS • Superior Control. Automatic brake modulation offers a smoother ride and better control in slippery conditions, allowing the operating to concentrate on driving. • Fuel Efficiency. During retarding applications the engine ECM does not inject fuel into the cylinders for additional fuel economy. Four Corner Retarding. If equipped with front oil cooled disc brake, four corner retarding with 60/40 percent split (rear/front) in braking effort provides superior control in slippery conditions. Balanced...

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777D - 10

Structures Rugged Cat structures are the backbone of the 777D off-highway truck’s durability. 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 crosscontamination and overheating from other sources. Supplemental Steering. Main hydraulic steering system is backed by a battery powered supplemental steering system which uses pressure accumulators and allows up to three 90 degree turns in case of engine failure. System...

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777D - 11

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. 1 Nitrogen 2 Oil 3 Rebound Chamber 4 Cylinder Housing 5 Piston

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777D - 12

Operator’s Station Ergonomically designed for operator comfort, superior control and high productivity. 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. 1 10) Monitoring System. Electronic Monitoring System (EMS III) features...

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