Gaining traction

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10 May 2011

Volvo had a new generation of motor graders on display at ConExpo - the G900B-Series. The range consists of the 15.8 tonne G930B, the 16.4 tonne G940B, the 17.3 tonne G946B and the 17.5 tonne G960B.
The machines are well-suited to heavy construction and road building applications involving slopes, and Volvo claims each model feature has the highest blade down pressure in its weight class, thanks to optimal overall machine balance and the distribution of the main grader components.
Volvo highlighted the improved traction on the latest models. The machines are fitted with new Stage IIIB / Tier 4 Interim-complaint engines for Europe and the US with three power curves with the 8X4 transmission and eight power curves with the 11X6 transmission to vary the power to match the level of traction available.
The transmission has also been moved to sit in front of the articulation pivot point beneath the cab in order to balance out the machines' weight distribution - assisting in blade down pressure at the front while at the same time weighing down the rear wheels and aiding drawbar pull.
And traction has been further improved by an operator-controlled hydraulic differential lock system that reduces rear axle strain and tyre wear.

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