User manual ZENOAH KOMATSU HD785-7 BROCHURE

[. . . ] Also, since the retarder cooling oil temperature is always monitored, the speed is automatically lowered. Mode selection system with VHPC The system allows selection of the appropriate mode between two modes <Power mode > or <Economy mode> according to each working condition. When the key switch is turned on, Economy mode is selected automatically. · Retarder absorbing capacity 1092 kW 1, 464 HP (continuous descent) · Brake surface area Front total : 37467 cm2 5, 807 in2 Rear total : 72414 cm2 11, 956 in2 AP-FOUR F, R : Retarder ( 4-Wheel ) Go down slope at constant speed AUTO RETARD SPEED CONTROL UP SET F7-R2 (RH/RL) fully automatic transmission The transmission is configured with 7 forward and 2 reverse gears. Fully automatic control is applied to all forward gears and an optimum gear is automatically selected according to the travel speed and engine speed. [. . . ] The result is more confident operation and greater productivity. Long wheelbase and wide tread With an extra-long wheelbase, a wide tread and an exceptionally low center of gravity, the HD785-7 hauls the load at higher speed for greater productivity, and delivers superior driving comfort over rough terrain. Easy-to-see instrument panel The instrument panel makes it easy to monitor critical machine functions. In addition, a caution light warns the operator of any problems that may occur. This makes the machine user friendly and easy to service. Ideal driving position settings The 5-way adjustable operator seat and the tilt-telescopic steering column provide an optimum driving posture, for increased driving comfort and more control over machine operation. The suspension seat dampens vibrations transmitted from the machine and reduces operator fatigue as well as holding the operator securely to assure confident operation. 78mm 3" width seat belt is provided as standard equipment. Small turning radius The MacPherson strut type front suspension has a special A-frame between each wheel and the main frame. The wider space created between the front wheels and the main frame increases the turning angle of the wheels. The larger this turning angle, the smaller the turning radius of the truck. 10. 1m 33'2" A-frame Large body A wide target area makes for easy loading with minimal soil spillage and more efficient hauling. Heaped capacity : 60. 0m3 78. 5yd3 Target area (inside length x width) : 7065mm 23' 2" x 5200mm 17' 1" Machine shown may include optional equipment. shown may 6 6 7 HD785-7 O F F - H I G H W AY T R U C K OFF-HIGHWAY TRUCK HD785-7 Synchronous control of engine and transmission At the time of gear shifting, the engine speed is controlled to coincide with transmission rotation speed to reduce shifting shocks. The synchronous control contributes to improve durability of power train since it reduces torque fluctuation. The MacPherson strut type front suspension The MacPherson type independent suspension is installed to the front wheels. The linkage arrangement with less friction allows the front wheel to follow the undulation of road surface smoothly, realizing excellent riding comfort. Viscous cab mounts Large capacity viscous cab mounts with excellent damping performance are used to mount the cab. They reduce cab vibration significantly and provide comfortable cab space with superb quietness and less vibrations. Noise level at operator's ear 75 dB(A) Electric body dump control Electric lever is used for body dump control. The lever is short in control travel and can be operated with light control effort. Steering: ISO 5010, SAE J1511 Brakes: ISO 3450 8 9 HD785-7 O F F - H I G H W AY T R U C K OFF-HIGHWAY TRUCK HD785-7 RELIABILITY FEATURES Komatsu components Komatsu manufactures the engine, torque converter, transmission, hydraulic units, and electrical parts on this dump truck. Komatsu dump trucks are manufactured with an integrated production system under strict quality control system guidelines. EASY MAINTENANCE Advanced monitoring system The Komatsu advanced monitoring system identifies maintenance items, reduces diagnostic times, indicates oil and filter replacement hours and displays abnormality codes. This monitor system helps to maximize machine production time. Reliable hydraulic system A large capacity oil cooler is installed in each hydraulic circuit, improving the reliability of the hydraulic units during sudden temperature rises. Further, in addition to the main filter, 10 = 3 (min) line filter is located at the entrance to the transmission control valve. This system helps prevent secondary faults. Electric circuit breaker A circuit breaker is adopted in important electric circuits that should be restored in a short time when a problem occurs in the electrical system. High-rigidity frame Front support is integrated with the frame. As a result, flexural rigidity and torsional rigidity that are indicators of drivability and riding quality are significantly improved. Flat face-to-face O-ring seals Flat face- to- face O-ring seals are used to securely seal all hydraulic hose connections and to prevent oil leakage. Hose Nipple Centralized greasing points Greasing points are centralized at three locations, it enables to approach from ground level. O-ring Sealed DT connectors Rugged and durable dump body design The standard dump body is made of high-tensile-strength steel with a Brinell hardness of 400 for excellent rigidity and reduced maintenance cost. The side and bottom plates of the dump section are reinforced with ribs for added strength. Main harnesses and controller connectors are equipped with sealed DT connectors providing high reliability, water resistance and dust resistance. Wet multiple-disc brakes and fully hydraulic controlled braking systems realize lower maintenance costs and higher reliability. [. . . ] From this weight resistance point, read horizontally to the curve with the highest obtainable speed range, then down to maximum descent speed the brakes can safely handle without exceeding cooling capacity. Grade distance: Continuous Descent 0 0 20 100 40 60 GROSS WEIGHT 200 300 400 x103 lb 80 100 120 140 160 180 200 x103 kg EMPTY LOADED Grade distance: 450 m (1, 480 ft) 0 0 20 100 40 60 GROSS WEIGHT 200 300 400 x103 lb 80 100 120 140 160 180 200 x103 kg EMPTY LOADED TOTAL RESISTANCE (GRADE + ROLLING) (%) km/h MPH -30 -25 -20 -15 -10 -5 EMPTY LOADED 100 90 80 70 60 50 40 x103 kg TRAVEL PERFORMANCE CURVE ECONOMY-MODE 70 80 140 160 180 200 220 240 260 280 300 320340360 380400 90 100 110 120 130 140150160170 GROSS WEIGHT 985mm 3'3" 4285mm 14'1" LOADED 4 8¡ EMPTY RIMPULL RIMPULL 10080mm 33'1" x103 lb x103 kg 1'8" 5530mm 18'2" 850mm 2'9" 9745mm 32'0" 7065mm 23'2" 165mm 6. 5" 100 km/h 60 MPH TOTAL RESISTANCE (GRADE + ROLLING) (%) TOTAL RESISTANCE (GRADE + ROLLING) (%) F1 Optional exhaust retarder -30 -25 F1 Optional exhaust retarder F2 -20 -15 F4 F5 F6 F7 -10 -5 F2 F3 F4 F5 F6 F7 F3 0 0 10 20 10 30 40 50 60 70 20 30 40 TRAVEL SPEED 80 50 90 100 km/h 60 MPH 0 0 10 20 10 30 40 50 60 70 20 30 40 TRAVEL SPEED 80 50 12 5200mm 17'1" 90 892mm 2'11" HD785-7 O F F - H I G H W AY T R U C K SPECIFICATIONS ENGINE Model . Dry type with double elements and precleaner, with dust indicator BRAKES Brakes meet ISO 3450 standard. Fully hydraulic control, oil-cooled multiple-disc type Parking brake . When hydraulic pressure drops below the rated level, parking brake is automatically actuated. [. . . ]