One of the latest Liebherr crawler range, the PR 764 Litronic, with its operating weight of up to 52.5 tonnes is the biggest hydrostatically driven crawler in the world and the 'monster truck' can be seen in action at Johnsons Wellfield Quarries.
Whether the machine is being used for heavy ripping jobs or to transport material, the optimum drive ratio is always available. Gear changes do not interrupt the power delivery because the diesel engine runs continuously in the optimum revolution range reducing fuel consumption, thereby lessening the environmental impact, and also increasing the machine's working life.
