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Komatsu Trucks HD785-7
HD785-7 Off-Highway Truck
If you are looking for a truck that perfectly matches power, speed and reliability, the 100 ton capacity HD785-7 is the truck for you. Your operator can max his production by using his two working modes, tight turning radius, hydropneumatic suspension, skip shift function and oil multi-disc brakes and retarder. And he'll do it in comfort in an ergonomic cab that rides on viscous dampers that reduce vibration and sound. Downshift, over-run and reverse inhibitors protect the truck and give the operator peace of mind.
Engine
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
Gross 1,200 HP
Gross 895 kW
ISO9249/SAE J1349 / Net
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
Electronically controlled
Lubrication system :
Method
Gear pump, force-lubrication
Filter
Full-flow type
Air cleaner
Dry type with double elements and pre-cleaned, with dust indicator
Transmission
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
Axles
Rear Axle
Full-floating
Final drive type
Planetary gear
Ratios:
Differential
3.357
Planetary
6.333
Suspension System
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°
Steering system
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°
Cab
Integral four-post ROPS/FOPS Level 2 cab structure
Main Frame
Type
Box-sectioned structure Integral front bumper
Brakes
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
Body
Capacity:
Struck
52.3 yd³
40 m³
Heaped (2:1 ,SAE)
78.5 yd³
60 m³
Payload
100.3 U.S. tons
91.0 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
HyDRaulic System
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
Weight (approximate)
Empty weight
158,800 lb
72000 kg
Max. gross vehicle weight:
366,000 lb
166000 kg
Not to exceed max. gross vehicle weight, including options, fuel and payload.
Weight distribution (Empty):
Front axle
47%
Rear axle
53%
Weight distribution (Loaded):
Front axle
31.5%
Rear axle
68.5%
tires
Standard Tires
27.00 R49
Service Refill Capacities
Fuel tank
345.6 U.S. Gal
1308 ltr.
Engine oil
34.1 U.S. Gal
129 ltr.
Torque converter, transmission and retarder cooling
