- Overall Length: 36.14 ft / 11015 mm
- Overall Height: 16.57 ft / 5050 mm
- Wheelbase: 16.25 ft / 4950 mm
- Turning Radius: 33.14 ft / 10100 mm
Published dimensions and weight
Komatsu HD785-7
The Komatsu HD785-7 is a rock truck of about 163.8 t, built around the SAA12V140E-3 engine.
01Published dimensions and weight
Dimensions reference
Representative category illustration; exact model may differ.Measurement reference — not to scale
01Dimensions referenceLength × width × height
02WeightNot publishedNot published
03Selected published values68
Rigid rock trucks are commonly used to haul rock and bulk material on mines, quarries and large earthmoving sites. Published rows for Komatsu HD785-7 include published payload of 91.7 metric tons, published maximum speed of 40.4 mph / 65 km/h, the published “Overall Length” field of 36.14 ft / 11015 mm. These values describe the published configuration; verify the specific machine's configuration, attachments and records.
- Compare the published “Overall Length” field (36.14 ft / 11015 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Overall Height” field (16.57 ft / 5050 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Wheelbase” field (16.25 ft / 4950 mm) with the specific machine's configuration and records; options and condition can differ.
02Specifications
Published values, clearly grouped.
Published specifications and measurements are organized by section for quick reference.
Dimensions
Overall Length36.14 ft11015 mm
Overall Height16.57 ft5050 mm
Wheelbase16.25 ft4950 mm
Turning Radius33.14 ft10100 mm
Width Over Tires17.07 ft5200 mm
Body
Capacity Struck40 yd330.6 m3
Heaped (2:1, Sae)60 yd345.9 m3
Payload91.7 metric tons91.7 metric tons
Material400 Brinell hardness high tensile strength steel400 Brinell hardness high tensile strength steel
Material Thickness-Bottom0.8 in19 mm
Material Thickness-Front0.5 in12 mm
Material Thickness-Sides0.4 in9 mm
Target Area7070 mm x 5150 mm7070 mm x 5150 mm
HeatingHeating by exhaust gasHeating by exhaust gas
StructureV-shape body with V-bottomV-shape body with V-bottom
Dumping Angle48 degrees48 degrees
Height At Full Dump33.1 ft10080 mm
Engine
Lubrication SystemMethod- Gear pump, force-lubrication ; Filter-Full-flow typeMethod- Gear pump, force-lubrication ; Filter-Full-flow type
Number Of Cylinders1212
Engine Make22382238
Engine ModelSAA12V140E-3SAA12V140E-3
Engine TypeWater-cooled, 4-cycleWater-cooled, 4-cycle
Air CleanerDry type with double elements and precleaners, with dust indicatorDry type with double elements and precleaners, with dust indicator
GovernorElectronic controlElectronic control
Power Measured @1900 rpm1900 rpm
Max Torque5080N. m 518 kg. m5080N. m 518 kg. m
AspirationTurbo-charged, after-cooledTurbo-charged, after-cooled
Displacement1860.1 cu in30.5 L
Bore And Stroke140 mm x 165 mm140 mm x 165 mm
Horse Power: Sae J19951200 hp894.9 kw
Horse Power: Iso 9249 / Sae J13491178 hp878.5 kw
Fan Drive TypeMechanicalMechanical
Fuel SystemDirect injectionDirect injection
Capacities
Fuel Tank1308 gal4951.4 L
Final Drive128 gal484.6 L
Hydraulic System175 gal662.5 L
Engine Oil129 gal488.4 L
Torque Converter, Transmission And Retarder Cooling205 gal776.1 L
Differentials137 gal518.7 L
Suspension93 gal352.1 L
Break Control36 gal136.3 L
Transmission
Max Speed40.4 mph65 km/h
Torque Converter3-elements, 1-stage, 2-phase3-elements, 1-stage, 2-phase
TransmissionFull-automatic, planetary typeFull-automatic, planetary type
Speed Range7 speeds forward and 2 reverse7 speeds forward and 2 reverse
Lockup ClutchWet, multiple-disc clutchWet, multiple-disc clutch
ForwardTorque converter drive in 1st gear, direct drive in 1st lockup and all higher gearsTorque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
ReverseTorque converter drivee, direct drive (lockup)Torque converter drivee, direct drive (lockup)
Shift ControlElectronic shift control with automatic clutch modulation in all gearsElectronic shift control with automatic clutch modulation in all gears
Weights
Gross Weight361073.1 lb163780 kg
Empty Weight158732.9 lb72000 kg
Weight Distribution Front - Empty47 %47 %
Weight Distribution Rear - Empty53 %53 %
Weight Distribution Front - Loaded31.4 %31.4 %
Weight Distribution Rear - Loaded68.6 %68.6 %
Tires
Standard Tire27.00 R4927.00 R49
Axles
Final DrivePlanetary gearPlanetary gear
Differential3.3573.357
Planetary6.3336.333
RearFull-floatingFull-floating
Hydraulic System
Hoist CylinderTwin, 2-stage telescopic typeTwin, 2-stage telescopic type
Relief Pressure20.6 MPa 210 kg/cm220.6 MPa 210 kg/cm2
Hoist TimeRaise-13 s; Lower-14 sRaise-13 s; Lower-14 s
Brakes
Parking BrakeSpring applied, multiple-disc type(actuates on all wheels)Spring applied, multiple-disc type(actuates on all wheels)
Service BrakeFront- Fully hydraulic control, oil-cooled multiple-disc type; Rear- Fully hydraulic control, oil-cooled multiple-disc typeFront- Fully hydraulic control, oil-cooled multiple-disc type; Rear- Fully hydraulic control, oil-cooled multiple-disc type
RetarderOil-cooled, multiple-disc front and rear brakes act as retarder.Oil-cooled, multiple-disc front and rear brakes act as retarder.
Secondary BrakePedal operation When hydraulic pressure drops below the rated level, parking brake is automatically actuatedPedal operation When hydraulic pressure drops below the rated level, parking brake is automatically actuated
Brake SurfaceFront- 37467 cm2 ; Rear-37467 cm2Front- 37467 cm2 ; Rear-37467 cm2
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Manufacturer-published specifications.