Komatsu intros new Tier 4 Dash 8 rigid dump trucks

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  • Earthmovers & Exacavators

Komatsu has introduced two new ‘Dash 8’ rigid dump truck models equipped with low-emissions Tier 4 engines.

Komatsu-HD405-8-dump-truck

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The 40-tonne capacity HD405-8 and the 63-tonne capacity HD605-8 are designed for quarry, construction and smaller-scale mining operations and the company says the new Tier 4 engines reduce fuel consumption by up to seven per cent.

The HD405-8 is powered by the Komatsu SAA6D140E-7 engine rated at 383kW, while the HD605-8 is powered by the SAA6D170E-7 rated at 540kW.

Both models are equipped with the Komatsu Traction Control System (KTCS), which provides optimum traction in various ground conditions, and Automatic Retard Speed Control (ARSC) which automates control over downhill travel speeds, even when under full load.

According to Richard Feehely, Komatsu Australia’s National Business Manager, Quarries, both new trucks have been designed to deliver the safest, most productive and cost-efficient operation across a wide range of operating conditions.

"Operators have unmatched control and safety in even the most difficult operating conditions, through our integrated transmission and braking system – which is recognised as being the best in the industry," Feehely says.

"This includes Komatsu’s K-Atomics automated transmission system with "skipshift" function for smoother operation, fully hydraulic wet multiple-disc brakes and retarder (689 kW retardation on the HD405-8, 802 kW on the HD605-8), Komatsu Traction Control System (KTSC) and Automatic Retard Speed Control (ARSC).

"Our ARSC lets operators simply dial-in the downhill speed required for safe travel, allowing them to concentrate on steering the truck."

Both trucks include long wheelbases and wide treads for a lower centre of gravity, allowing higher haul speeds and superior driving comfort. The trucks also have McPherson-strut type front suspension which allows for an increased turning angle of the front wheels, resulting in a smaller turning radius, for increased manoeuvrability, particularly on smaller sites.

"Quarries, contractors, plant hirers and smaller mining operations will be able to further lower their owning and operating costs, while achieving an unrivalled level of control and visibility of their production and operating variables," Feehely says.

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