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. [. . . ] Any additional oil is sent to the brake cooling system along with the oil used in the drive fan. 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 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. 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. The operator can use this feature to take S·O·SSM analysis samples. [. . . ] · No engine derating required up to 2286 m (7, 500 ft) altitude. Environmental Protection Agency Tier 3 emissions standards and European Union Stage IIIa regulations. Brakes Brake Surface ­ Front Brake Surface ­ Rear Brake Standards 1395 cm2 216 in2 50 284 cm2 7, 794 in2 ISO 3450: 1996 Weights ­ Approximate Target Gross Machine Operating Weight Chassis Weight Body Weight 82 100 kg 25 025 kg 10 429 kg 181, 000 lb · Target Gross Machine Operating Weight is up to 82 100 kg (181, 000 lb). Body Hoists 55, 171 lb 23, 013 lb Pump Flow ­ High Idle Relief Valve Setting ­ Raise Relief Valve Setting ­ Lower Body Raise Time* Body Lower Time ­ Float Body Power Down ­ High Idle* 515 L/min 136 gal/min 17 255 kPa 2, 500 psi 3450 kPa 500 psi 8. 1 Seconds 14. 7 Seconds 14. 3 Seconds · Body weight varies depending on how body is equipped. Shown above is the Flat Floor, Medium Impact, Steel Body System. Operating Specifications Nominal Payload Class (100%) Maximum Working Payload (110%) Not to Exceed Payload* (120%) Top Speed ­ Loaded Body Capacity ­ SAE 2:1 Target Payload Capacity 46 tonnes 51 tonnes 55 tonnes 79. 7 km/h 31. 3 m3 45 tonnes 51 tons 56 tons 61 tons 49. 5 mph 41 yd3 50 tons * Without Sound Suppression Package Capacity ­ Dual Slope ­ 100% fill factor Struck Heaped 2:1 (SAE) 24. 2 m3 31. 2 m3 31. 7 yd3 40. 8 yd3 · Nominal payload and capacity based on Quarry Body. Liner and attachment selection will affect payload and maximum gross machine operating weight. [. . . ]