Category : Off-Highway Trucks ➔ Manufacturer : Komatsu ➔ Model : HD405-7 ➔
The Komatsu HD405-7 is an off-highway rigid dump truck designed for hauling material in mining, quarry, and large earthmoving applications. It is part of Komatsu's HD series and is built for high-capacity transport on rough haul roads and demanding site conditions. The HD405-7 typically features a diesel engine, heavy-duty frame, hydraulic braking system, and operator cab designed for visibility and control. Its configuration supports efficient material movement in production environments where durability, payload capacity, and serviceability are important. The model is commonly used in aggregate, construction, and mining operations requiring dependable off-road haulage equipment.
General Specifications
Komatsu HD405-7 Off-Highway Truck General Specifications specifications
Articulated/Rigid
Rigid - Starting 2016
Drive Configuration
RWD - Starting 2016
Drive System Mech/Electr.
M - Starting 2016
Engine Type
Komatsu SAA6D140E-5 - Starting 2016
Operating Weight
165,520.00 lbs (75,078.70 kg) - Starting 2016
Rated Payload
45.20 t (45,200.00 kg) - Starting 2016
Axles
Komatsu HD405-7 Off-Highway Truck Axles specifications
Differential
3.125
Final Drive
Planetary gear
Planetary
4.737
Rear
Full-floating
Body
Komatsu HD405-7 Off-Highway Truck Body specifications
Capacity Struck
26.2 cu yd
Dumping Angle
48 degrees
Heaped (2:1, Sae)
35.7 cu yd
Heating
Exhaust heating
Height At Full Dump
26.00 ft (7.92 m)
Material
150 kg/mm2 227520 psi high-tensile-strength steel
Material Thickness-Bottom
1.00 in (2.54 cm)
Material Thickness-Front
0.70 in (1.78 cm)
Material Thickness-Sides
0.60 in (1.52 cm)
Payload
5.241.0 metric tons 40 U.S. tons
Structure
V-shape body
Target Area
5590 mm x 3380 mm 18\\\'4\\\" x 11\\\'1\\\"
Brakes
Komatsu HD405-7 Off-Highway Truck Brakes specifications
Brake Surface
Front- 968 cm2 150 in2 ; Rear - 50847 cm2 7,881 in2
Parking Brake
Spring applied, caliper disc type
Retarder
Oil-cooled, multiple-disc rear brakes act as retarder
Secondary Brake
Manual pedal operation. When hydraulic pressure drops below the rated level, parking brake is automatically actuated
Service Brake
Front- Fully hydraulic control, caliper disc type; Rear- Fully hydraulic, oil-cooled, multiple-disc type
Capacities
Komatsu HD405-7 Off-Highway Truck Capacities specifications
Differentials
11.90 gal (45.04 l)
Engine Oil
13.20 gal (49.96 l)
Final Drive
7.90 gal (29.90 l)
Fuel Tank
127.90 gal (484.10 l)
Hydraulic System
34.10 gal (129.07 l)
Suspension
11.70 gal (44.28 l)
Torque Converter, Transmission And Retarder Cooling
23.80 gal (90.08 l)
Dimensions
Komatsu HD405-7 Off-Highway Truck Dimensions specifications
Overall Height
12.64 ft (3.85 m)
Overall Length
27.75 ft (8.46 m)
Overall Width
12.00 ft (3.66 m)
Turning Radius @ Centre Front Tyre
23.63 ft (7.20 m)
Wheelbase
12.33 ft (3.76 m)
Electrical System
Komatsu HD405-7 Off-Highway Truck Electrical System specifications
Alternator
4V, 50 Ah
Batteries
2 x 12V, 170 Ah
Electric Circuit Breaker
24 Volt
Starter Motor
11kW
Engine
Komatsu HD405-7 Off-Highway Truck Engine specifications
Air Cleaner
Dry type with double elements and precleaner, plus dust indicator
Aspiration
Turbo-charged,air-to-air after-cooled,cooled EGR
Bore And Stroke
140 mm x 165 mm 5.5\" x 6.5\"
Displacement
930.00 cu in (15,240.00 cu cm)
Engine Make
2238
Engine Model
SAA6D140E-5?
Engine Type
Water-cooled, 4-cycle
Fan Drive Type
Mechanical
Fuel System
Direct injection
Governor
Electronically controlled
Horse Power: Iso 9249 / Sae J1349
498.00 hp (371.36 kw)
Horse Power: Sae J1995
518.00 hp (386.28 kw)
Lubrication System
Method- Gear pump, force-lubrication, Filter-Full-flow type
Max Torque
1,598.30 lbs ft (2,166.98 nm)
Number Of Cylinders
6
Power Measured @
2000 rpm
Hydraulic System
Komatsu HD405-7 Off-Highway Truck Hydraulic System specifications
Hoist Cylinder
Twin, 2-stage telescopic type
Hoist Time
10 sec
Relief Pressure
20.6 MPa 210 kg/cm2 2,990 psi
Power Train
Komatsu HD405-7 Off-Highway Truck Power Train specifications
Power Train Type
Transmission, full automatic, electric control with clutch modulation. - Differential, standard.
Tires
Komatsu HD405-7 Off-Highway Truck Tires specifications
Standard Tire
18.00 R33
Transmission
Komatsu HD405-7 Off-Highway Truck Transmission specifications
Forward
Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
Lockup Clutch
Wet, single-disc clutch
Max Speed
43.50 mph (70.01 kph)
Reverse
Torque converter drive
Shift Control
Electronic shift control with automatic clutch modulation in all gear
Speed Range
7 speeds forward and 1 reverse
Torque Converter
3-elements, 1-stage, 2-phase
Transmission
Full-automatic, planetary type
Weights
Komatsu HD405-7 Off-Highway Truck Weights specifications
Empty Weight
75,840.00 lbs (34,400.49 kg)
Gross Weight
165,520.00 lbs (75,078.70 kg)
Loaded Weight
164,200.00 lbs (74,479.96 kg)
Weight Distribution Front - Empty
50.7 %
Weight Distribution Front - Loaded
32.8 %
Weight Distribution Rear - Empty
49.3 %
Weight Distribution Rear - Loaded
67.2 %
