• Engine

    Model Komatsu SAA6D140E-5
    Type Four-cycle, water-cooled, direct injection
    Aspiration Turbo-charged, after-cooled, cooled EGR
    Number of cylinders 6
    Bore x stroke 140 mm x 165 mm
    Displacement 15.24 ltr
    Horsepower, Gross - SAE J1995 386 kW / 518 HP
    Horsepower, Net - ISO 9249 / SAE J1349 371 kW / 498 HP
    Rated RPM 2000
    Fan drive method Mechanical
    Emissions certification EPA Tier 3
  • Axles

    Rear axle Full-floating
    Final drive type Planetary gear
    Differential 3.125
    Planetary 4.737
  • Body

    Capacity, struck 20 m3
    Capacity, heaped (2:1 SAE) 27.3 m3
    Payload 41000 kg
    Target area (inside length x width) 5590 mm x 3380 mm
    Heating Exhaust heating
    Material 160 kg/mm2 high tensile strength steel
    Material thickness:
    Bottom 25 mm
    Front 16 mm
    Sides 14 mm
  • Brakes

    Standard ISO3450, SAE1473
    Service brake - front Full-hydraulic control, caliper disc type
    Service brake - rear Full-hydraulic control, oil-cooled multiple-disc type
    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 rated level, parking brake automatically actuated
    Brake surface:  
    Front 968 cm2
    Rear 50847 cm2
  • Cab

    Standard ISO3471, SAEJ1040-1988c (ROPS)
  • Hydraulic System

    Hoist cylinder Twin, two-stage telescopic type
    Relief pressure

    20.6 MPa

    210 kg/cm2

    Hoist time 10 sec
  • Main Frame

    Type Box-sectioned structure
  • Service Refill Capacities

    Fuel tank 484 ltr
    Engine oil 50 ltr
    Torque converter, transmission and retarder cooling 90 ltr
    Differentials 45 ltr
    Final drives (total) 30 ltr
    Hydraulic system 129 ltr
    Suspension (total) 44.2 ltr
  • Steering System

    Type Fully hydraulic power steering with two double-acting cylinders
    Supplementary steering Manual control (meets ISO5010, SAEJ1511 and SAEJ53)
    Minimum turning radius, wall to wall 7.2 m
    Maximum steering angle 43°
  • Suspension System

    Independent , hydro-pneumatic suspension cylinder with fixed throttle to dampen vibration

    Effective cylinder stroke (front suspension) 250 mm
    Rear axle oscillation:  
    Oil stopper 6.8°
    Mechanical stopper 8.1°
  • Transmission

    Torque converter 3-elements, 1-stage, 2-phase
    Transmission Full-automatic, planetary type
    Speed range 7 speeds forward and 1 reverse
    Lockup clutch Wet, single-disc clutch
    Forward Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
    Reverse Torque converter drive
    Shift control Electronic shift control with automatic clutch modulation in all gears
    Maximum travel speed 70 km/h
  • Tyres

    Standard tyre 18.00 R33
  • Weight (Approximate)

    Empty and Gross Weight:

    Empty weight 34400 kg
    Gross vehicle weight (loaded) 74480 kg
    Max. gross vehicle weight 75080 kg



    Weight Distribution:

    Front axle 50.7%
    Rear axle 49.3%
    Front axle 32.8%
    Rear axle 67.2%

HD405-7 Dump Trucks

Komatsu’s 40 tonne capacity HD405-7 truck has been specifically developed for quarry, construction and small-scale mining operations. These trucks are recognised for their advanced transmission and braking systems that ensure optimum traction and the industry’s highest safety standards. As with all our trucks, key components are designed and manufactured by Komatsu to work together in an integrated package. And it comes standard with our KOMTRAX remote monitoring and location system, backed by our Australia-wide service and support network.

  • 371 kW / 498 HP
  • 75,080 kg
  • 41,000 kg


Komatsu Advanced Transmission with Optimum Modulation Control System

Fully automatic control selects the optimum gear, according to vehicle and engine speed. The shift point automatically changes, depending on the acceleration of the vehicle. This avoids unnecessary fuel consumption.

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