| Gross Power | Gross 1,200 HP Gross 895 kW |
|---|---|
| Max. Torque | 3,747 lb ft 518 kg•m |
| Displacement | 1,860 in³ 30.48 ltr |
Variable Horsepower Control
Both in Power and Economy modes, the VHPC system detects whether the truck is loaded or not loaded and selects the optimum horsepower setting mode, providing both high production and low fuel consumption.
Makes the best use of horsepower to attain optimal production. This mode is suitable for operation in job sites including uphill travel with a load where throughput takes top priority.
Sets the maximum horsepower at a lower level to reduce fuel consumption. The machine maintains sufficient power for normal operation in this mode.
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. To reduce fuel consumption, the shifting point is automatically selected depending on the acceleration of the machine.
The HD785-7 is equipped with AP-FOUR that applies retarding force on all four wheels. This reduces the possibility of tire-lock and enables effective use of retarder capacity, allowing stable downhill travel. The machine descends slopes smoothly and comfortably without machine body pitching since retarding force on the front and rear wheels is controlled independently.
• Retarder Absorbing Capacity: 1092 kW 1,464 HP (continuous descent)
• Brake Surface Area (rear):
Front total: 37467 cm² 5,807 in²
Rear total: 72414 cm² 11,224 in²
ARSC allows the operator to simply set the downhill travel speed and go down slopes at a constant speed. This allows the operator to concentrate on steering. The speed can be set at increments of 1 km/h 0.6 MPH per click (±5 km/h 3.1 MPH of setting speed adjustment) to match the optimum speed for the slope. The retarder cooling oil temperature is constantly monitored and the descent speed is automatically reduced, if necessary.
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. A 78 mm 3" wide seat belt is provided as standard equipment.
The electronically controlled all clutch modulation system, “K-ATOMiCS”, optimizes the clutch engagement oil pressure at every gear. This system optimizes the clutch lock-up process for smoother shifting with minimal torque shock.
The MacPherson-type independent suspension is utilized on the front wheels. This linkage arrangement allows the front wheel to follow the undulation of the road surface smoothly, realizing excellent riding comfort.
Front support is integrated with the frame. The frame rigidity has been substantially increased. As a result, flexural rigidity and torsional rigidity, which are indicators of drivability and ride quality, are significantly improved.
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.
| Model | Komatsu SAA12V140E-3 | |
| Type | Water-cooled, 4-cycle | |
| Aspiration | Turbo-charged, after-cooled | |
| Number of cylinders | 12 | |
| Bore x Stroke | 5.51" x 6.50" | 140 mm x 165 mm |
| Piston displacement | 1,860 in³ | 30.48 ltr |
| Horsepower | ||
| SAE J1995 | Gross 1,200 HP | Gross 895 kW |
| ISO 9249 / SAE J1349 | Net 1,178 HP | Net 879 kW |
| Rated rpm | 1,900 rpm | |
| Fan drive type. | Mechanical | |
| Maximum torque | 3,747 lb ft | 518 kg•m |
| Fuel system | Direct injection | |
| Governor | Electronic control | |
| Lubrication system | ||
| Method | Gear pump, force-lubrication | |
| Filter | Full-flow type | |
| Air cleaner | Dry type with double elements and pre-cleaned, with dust indicator |
| Torque converter | 3-elements, 1-stage, 2-phase | |
| Transmission | Full-automatic, planetary-shaft type | |
| Speed range | 7 speeds forward and 2 reverse (RH, RL) | |
| Lockup clutch. | Wet, multiple-disc clutch | |
| Forward | Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears | |
| Reverse | Torque converter drive, direct drive (lockup) | |
| Shift control | Electronic shift control with automatic clutch modulation in all gear | |
| Maximum travel speed | 40.4 mph | 65 km/h |
| Rear axles | Full-floating |
| Final drive type | Planetary gear |
| Ratios: | |
| Differential | 3.357 |
| Planetary | 6.333 |
Independent, hydropneumatic suspension cylinder with fixed throttle to dampen vibration.
| Effective cylinder stroke: | ||
| Front suspension | 12.6" | 320 mm |
| Rear suspension | 5.0" | 127 mm |
| Rear axle oscillation | 6.5° |
| Type | Fully hydraulic power steering with two double-acting cylinders | |
| Supplementary steering | Electro-hydraulic motor | |
| Minimum turning radius | 33'2" | 10.1 m |
| Maximum steering angle | 41° |
Integral four-post ROPS/FOPS Level 2 cab structure
| Type | Box-sectioned structure Integral front bumper |
Brakes meet ISO 3450 standard. | ||
| Service brakes: | ||
| Front | Fully hydraulic control, oil-cooled multiple-disc type | |
| Rear | Fully hydraulic control, oil-cooled multiple-disc type | |
| Parking brake | Spring applied, multiple-disc type(actuates on all wheels) | |
| Retarder | Oil-cooled, multiple-disc front and rear brakes act as retarder | |
| Secondary brake | Manual pedal operation. When hydraulic pressure drops below the rated level, parking brake is automatically actuated. | |
| Brake surface | ||
| Front | 5,807 in² | 37467 cm² |
| Rear | 11,224 in² | 72414 cm² |
| Capacity: | ||
| Struck | 52.3 yd³ | 40 m³ |
| Heaped (2:1, SAE) | 78.5 yd³ | 60 m³ |
| Nominal payload | 101.1 U.S. tons | 91.7 metric tons |
| Material | 400 Brinell hardness high tensile strength steel | |
| Structure | V-shape body with V-bottom | |
| Material thickness: | ||
| Bottom | 0.75" | 19 mm |
| Front | 0.47" | 12 mm |
| Sides | 0.35" | 9 mm |
| Target area (inside length x width) | 23'2"x 17'1" | 7065 mm x 5200 mm |
| Dumping angle | 48° | |
| Height at full dump | 33'1" | 10080 mm |
| Heating | Exhaust heating |
| Hoist cylinder | Twin, 2-stage telescopic type | |
| Relief pressure | 2,990 psi | 20.6 MPa / 210 kg/cm² |
| Hoist time | ||
| Raise | 13 sec | |
| Lower | 14 sec |
| Empty weight | 158,909 lb | 72080 kg |
| Nominal gross vehicle weight (GVW) | 361,073 lb | 163780 kg |
| Weight distribution (Empty): | ||
| Front axle | 47% | |
| Rear axle | 53% | |
| Weight distribution (Loaded): | ||
| Front axle | 31.5% | |
| Rear axle | 68.5% |
| Standard tire | 27.00 R49 |
| Fuel tank | 345.6 U.S. Gal | 1308 ltr. |
| Engine oil | 34.1 U.S. Gal | 129 ltr. |
| Torque converter, transmission and retarder cooling | 54.2 U.S. Gal | 205 ltr. |
| Differentials | 36.2 U.S. Gal | 137 ltr. |
| Final drives (total) | 33.8 U.S. Gal | 128 ltr. |
| Hydraulic system | 46.2 U.S. Gal | 175 ltr. |
| Brake control | 9.5 U.S. Gal | 36 ltr. |
| Suspension (total) | 24.6 U.S. Gal | 93 ltr. |
| Engine coolant | 74.8 U.S. Gal | 283 ltr |
KOMATSU
Name : KOMATSU
Service Tel : (8621)-6841-4567
E-mail :
Web Site : https://home.komatsu/en/
Address :
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