• Engine

    ModelKomatsu SAA6D140E-7
    TypeFour-cycle, water-cooled, direct injection
    AspirationTurbo-charged, after-cooled, cooled EGR
    Number of cylinders6
    Bore x stroke140 mm x 165 mm
    Displacement15.24 ltr
    Horsepower, Gross - SAE J1995386 kW / 518 HP
    Horsepower, Net - ISO 9249 / SAE J1349383 kW / 514 HP
    Rated RPM2000
    Fan drive methodHydraulic
    Emissions certificationEPA Tier 4 Final
  • Axles

    Rear axleFull-floating
    Final drive typePlanetary gear
  • Body

    Capacity, struck20 m3
    Capacity, heaped (2:1 SAE)24 m3
    Payload40000 kg
    Target area (inside length x width)5640 mm x 3380 mm
    HeatingExhaust heating (option)
    Material160 kg/mm2 high tensile strength steel
    Material thickness:
    Bottom19 mm
    Front16 mm
    Sides14 mm
  • Brakes

    StandardISO3450, SAE1473
    Service brake - frontFull-hydraulic control, caliper disc type
    Service brake - rearFull-hydraulic control, oil-cooled multiple-disc type
    Parking brakeSpring applied, multiple disc type
    RetarderOil cooled, multiple-disc rear brakes act as retarder
    Secondary brakeManual pedal operation. When hydraulic pressure drops below rated level, parking brake automatically actuated
    Brake surface: 
    Front968 cm2
    Rear50847 cm2
  • Cab

    StandardISO3471, SAEJ1040-1988c (ROPS)
  • Hydraulic System

    Hoist cylinderTwin, two-stage telescopic type
    Relief pressure 20.6 MPa 210 kg/cm2
    Hoist time10 sec
  • Main Frame

    TypeBox-sectioned structure
  • Service Refill Capacities

    Fuel tank456 ltr
    DEF tank34.7 ltr
    Engine oil50 ltr
    Torque converter, transmission and retarder cooling112 ltr
    Differentials45 ltr
    Final drives (total)30 ltr
    Hydraulic system120 ltr
    Suspension (total)44.2 ltr
  • Steering System

    TypeFully hydraulic power steering with two double-acting cylinders
    Supplementary steeringAutomatic/manual controlled (meets ISO5010, SAEJ1511 and SAEJ53)
    Minimum turning radius, wall to wall7.9 m
    Maximum steering angle38°
  • Suspension System

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

    Effective cylinder stroke (front suspension)250 mm
    Rear axle oscillation: 
    Oil stopper6.8°
    Mechanical stopper8.1°
  • Transmission

    Torque converter3-elements, 1-stage, 2-phase
    TransmissionFull-automatic, planetary type
    Speed range7 speeds forward and 1 reverse
    Lockup clutchWet, single-disc clutch
    ForwardTorque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
    ReverseTorque converter drive
    Shift controlElectronic shift control with automatic clutch modulation in all gears
    Maximum travel speed66 km/h
  • Tyres

    Standard tyre21.00 R33
  • Weight (Approximate)

    Empty and Gross Weight:

    Empty weight 37335 kg
    Gross vehicle weight 77415 kg



    Weight Distribution:

    Front axle 54.2%
    Rear axle 45.8%
    Front axle 32.9%
    Rear axle 67.1%

HD405-8 Dump Trucks

Now with a new technology Komatsu engine, our 40 tonne capacity HD405-8 truck is ideal for quarry, construction and small-scale mining operations. Advanced transmission and braking systems 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.


Tier 4 Engine KDPF Regeneration
  • 383 kW / 514 HP
  • 77,415 kg
  • 40,000 kg

Current Offers

Selectable Economy and Power Working Modes

Selectable working modes for Economy and Power allows machine performance to be optimised based on demand and operating conditions

Auto Idle Shutdown

In order to reduce unwanted idle time, Komatsu machines feature Komatsu Auto Idle Shutdown. This function will shut the engine off and apply the parking brake and hydraulic lock after a preset idle time limit

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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