Komatsu GD555-5 grader

VIDEO: New Komatsu Vantage-series graders offer class-leading visibility, increased power and non-stall transmission

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Komatsu has released its new Dash 5 Vantage series of graders - consisting of two models, the GD555-5 and the GD655-5.

Komatsu says the two models feature the best cab visibility of any grader on the market, increased engine power, and an upgraded version of its unique dual-mode transmission system.

Operating weight of the GD555-5 is 17.1 tonnes, with variable power up to 144 kW (depending on which gear is in use).

According to Kevin Edwards, Komatsu Australia's National Business Manager, the key advance in the new grader range is the visibility from the cab, which he said is class leading against any other grader on the market.

"The visibility on these graders - whether to the blade, out the front or to the rear, is absolutely unrivalled - which is why we've tagged them our 'Vantage' series grader," he said.

Both graders are powered by Komatsu's Tier 3-compliant SAA6D107E-1 - the same engine which is used in a number of other Komatsu machines, including WA250PZ-6 to WA380-6 loaders, PC200-8 to PC270-8 excavators and the D51EX-21 dozer.

The Vantage graders are also equipped with power and economy modes.

The new Dash 5 Vantage series incorporates a dual transmission system. This gives the operator the choice of direct drive (manual) transmission, or torque converter transmission for improved control at low speeds and in final finishing - all at the flick of a switch.

"With these new graders, Komatsu has also developed a new non-stall transmission feature which is incorporated while in manual mode," said Edwards.

"If engine revs drop too far during direct drive mode in tough conditions, such that the engine approaches stalling speed, the transmission automatically switches to torque converter mode until the engine powers back up."



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