Komatsu HD785-7 Haul Truck


Dimensions

Overall Length 36.14 ft in (11015 mm)
Overall Height 16.57 ft in (5050 mm)
Wheelbase 16.25 ft in (4950 mm)
Turning Radius 33.14 ft in (10100 mm)
Width Over Tires 17.07 ft in (5200 mm)

Body

Capacity Struck 40 yd3 (30.6 m3)
Heaped (2:1, Sae) 60 yd3 (45.9 m3)
Payload 91.7 metric tons
Material 400 Brinell hardness high tensile strength steel
Material Thickness-Bottom 0.8 in (19 mm)
Material Thickness-Front 0.5 in (12 mm)
Material Thickness-Sides 0.4 in (9 mm)
Target Area 7070 mm x 5150 mm
Heating Heating by exhaust gas
Structure V-shape body with V-bottom
Dumping Angle 48 degrees
Height At Full Dump 33.1 ft in (10080 mm)

Engine Details

Lubrication System Method- Gear pump, force-lubrication ; Filter-Full-flow type
Number Of Cylinders 12
Engine Make Komatsu
Engine Model SAA12V140E-3
Engine Type Water-cooled, 4-cycle
Air Cleaner Dry type with double elements and precleaners, with dust indicator
Governor Electronic control
Power Measured @ 1900 rpm
Max Torque 5080N. m 518 kg. m
Aspiration Turbo-charged, after-cooled
Displacement 1860.1 cu in (30.5 L)
Bore And Stroke 140 mm x 165 mm
Horse Power: Sae J1995 1200 hp (894.9 kw)
Horse Power: Iso 9249 / Sae J1349 1178 hp (878.5 kw)
Fan Drive Type Mechanical
Fuel System Direct injection

Capacities

Fuel Tank Capacity 1308 gal (4951.4 L)
Final Drive 128 gal (484.6 L)
Hydraulic System 175 gal (662.5 L)
Engine Oil 129 gal (488.4 L)
Torque Converter, Transmission And Retarder Cooling 205 gal (776.1 L)
Differentials 137 gal (518.7 L)
Suspension 93 gal (352.1 L)
Break Control 36 gal (136.3 L)

Transmission

Max Speed 40.4 mph (65 km/h)
Torque Converter 3-elements, 1-stage, 2-phase
Transmission Full-automatic, planetary type
Speed Range 7 speeds forward and 2 reverse
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 drivee, direct drive (lockup)
Shift Control Electronic shift control with automatic clutch modulation in all gears

Weights

Gross Weight 361073.1 lb (163780 kg)
Empty Weight 158732.9 lb (72000 kg)
Weight Distribution Front – Empty 47 %
Weight Distribution Rear – Empty 53 %
Weight Distribution Front – Loaded 31.4 %
Weight Distribution Rear – Loaded 68.6 %

Tires

Standard Tire 27.00 R49

Axles

Final Drive Planetary gear
Differential 3.357
Planetary 6.333
Rear Full-floating

Hydraulic System

Hoist Cylinder Twin, 2-stage telescopic type
Relief Pressure 20.6 MPa 210 kg/cm2
Hoist Time Raise-13 s; Lower-14 s

Brakes

Parking Brake Spring applied, multiple-disc type(actuates on all wheels)
Service Brake Front- Fully hydraulic control, oil-cooled multiple-disc type; Rear- Fully hydraulic control, oil-cooled multiple-disc type
Retarder Oil-cooled, multiple-disc front and rear brakes act as retarder.
Secondary Brake Pedal operation When hydraulic pressure drops below the rated level, parking brake is automatically actuated
Brake Surface Front- 37467 cm2 ; Rear-37467 cm2
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