User manual CATERPILLAR 772 BROCHURE

[. . . ] 772 Off-Highway Truck ® Engine Engine Model Gross Power ­ SAE J1995 Net Power ­ SAE J1349 Weights ­ Approximate Target Gross Machine Operating Weight Cat C18 ACERTTM 446 kW 598 hp 399 kW 535 hp ® Operating Specifications Nominal Payload Class (100%) Maximum Working Payload (110%) Not to Exceed Payload* (120%) Body Capacity ­ SAE 2:1 46 tonnes 51 tonnes 55 tonnes 31. 3 m3 51 tons 56 tons 61 tons 41 yd3 82 100 kg 181, 000 lb · Nominal payload and capacity based on Quarry Body. Liner and attachment selection will affect payload and maximum gross machine operating weight. * Refer to Caterpillar® 10/10/20 Payload Policy for maximum gross machine weight limitations. 772 Off-Highway Truck Engineered for performance, designed for comfort, built to last. Power Train ­ Engine The Cat® C18 engine with ACERTTM Technology uses advanced engine technology to reduce emissions without after-treatment. The turbocharged, aftercooled 6-cylinder engine has faster response for superior performance in demanding applications. [. . . ] Because oil is now used to actuate the brakes, Caterpillar has eliminated the need for two brake master cylinders, two relay valves, an air dryer and the retarder valve (found on ARC trucks only) that were associated with the air-over-hydraulic brake system. The air system had complexity, which affected its reliability. The oil actuated system is simpler and more reliable. 12 ARC 1 2 1 2 3 4 5 6 7 8 Service Brake Sensor Engine Sensor ARC ARC Switch Brakes Service Brakes Axle Speed Sensor TCS TCS 6 7 8 3 7 5 4 6 Engine Speed (rpm) Pistons. The Caterpillar two-piece 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. The 772 parking brake function is provided by the spring-applied function in each of the rear oil-cooled disc brakes. The 772 parking brake is capable of holding the machine with a rated load on grades up to 15 percent. Automatic Retarder Control (ARC). Standard ARC electronically controls braking on grade to maintain engine at approximately 2, 200 rpm (adjustable from 1, 950 to 2, 200 rpm in increments of 10). ARC is deactivated when the operator applies the brakes or throttle. 2, 500 2, 000 · Ease of Operation. ARC increases operating ease, resulting in greater operator confidence with less fatigue. Automatically activates ARC when engine speed exceeds factory preset levels, regardless of operator inputs, to avoid potentially damaging engine overspeeds. Traction Control System (TCS) (Optional). 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. Optional Compression Brake is integrated with Automatic Retarder Control (ARC) to provide up to 35 percent higher downhill travel speed and reduce wear on brake components. 1, 500 1, 000 500 0 10 20 30 40 50 Time (Seconds) 60 70 With Automatic Retarder Control (average speed, 1, 950 rpm) With Manual Retarder Control (average speed, 1, 730 rpm) · Faster Speeds. ARC allows the operator to maintain optimum engine speeds for up to 15 percent faster downhill hauls and greater productivity. Automatic brake modulation offers a smoother ride and better control in slippery conditions, allowing the operator to concentrate on driving. 13 Serviceability Less time spent on maintenance means more time on the haul roads. · Transmission, Hoist and Steering Lockout Switch. The 772 features an all-new transmission, hoist and steering lockout mode. This feature disables the steering, hoist and transmission hydraulics, and sets the parking brake while the engine is running, allowing maintenance and trouble-shooting on the truck. [. . . ] Liner and attachment selection will affect payload and maximum gross machine operating weight. * Refer to Caterpillar® 10/10/20 Payload Policy for maximum gross machine weight limitations. Capacity ­ Flat Floor ­ 100% fill factor Struck Heaped 2:1 (SAE) 23. 3 m3 31. 3 m3 30. 5 yd3 41 yd3 22 772 Off-Highway Truck specifications Weight Distributions ­ Approximate Front Axle ­ Empty Front Axle ­ Loaded Rear Axle ­ Empty Rear Axle ­ Loaded 48% 34% 52% 66% ROPS ROPS/FOPS Standards · ROPS (Rollover Protective Structure) for cab offered by Caterpillar meets ISO 3471:1994 ROPS criteria. · FOPS (Falling Objects Protective Structure) meets ISO 3449:1992 Level II FOPS criteria. Suspension Sound Effective Cylinder Stroke ­ Front Effective Cylinder Stroke ­ Rear Rear Axle Oscillation 234 mm 149 mm 8. 94° 9. 2 in 5. 9 in Sound Standards · The operator sound pressure level measured according to work cycle procedures specified in ANSI/SAE J919 APR95 is 79 dB(A) for cab offered by Caterpillar, when properly installed and maintained and tested with doors and windows closed, engine speed at high idle, and fan at medium settings. 140 gal 30 gal 16 gal 42 gal 9 gal 15 gal 35 gal 73 gal 14 gal 25 gal Steering Standards Steer Angle ISO 5010:1992 36° · The exterior sound pressure level for the standard machine measured at a distance of 15 m (49 ft) according to the test procedures specified in SAE J88 APR95, mid-gear moving operation is 84 dB(A). [. . . ]