First publishedin Aggregates Business Europe
Liebherr’s new PR 766 crawler tractor is a 50tonne class model equipped with Innovative engine management, proactive power adjustment and Eco mode to optimise machine performance and fuel consumption.
Well-suited to mining and quarrying applications, the PR 766 surpasses Stage IV/Tier 4 emission standards without the need of a diesel particulate filter. The crawler tractor is said to work efficiently, safely and comfortably thanks to the continued development of its ergonomics. Meanwhile, successful Liebherr drive technology ensures a high level of model reliability.
As a result of the hydrostatic drive in the PR 766, the speed of the diesel engine can be kept constant in practical use regardless of the required load. As such, the unit is always said to run at optimum speed efficiency. The fact that speed fluctuations are avoided has, claims the German manufacturer, set the Liebherr travel drive apart from all other large crawler tractor drive concepts currently available on the market.
As with all of Liebherr’s Generation 6 crawler tractors, the PR 766 comes equipped with the ‘ECO function’. This gives the driver the opportunity to choose between high performance and maximum efficiency. In lightweight to moderately heavy applications, the ECO control system ensures increased efficiency and therefore additional fuel savings compared to conventional drive concepts.
The proactive power adjustment is another innovative feature of Generation 6. This involves both internal engine and external machine parameters being recorded, such as the deflection of the drive joystick, and the engine power is automatically increased for a short period based on the current demand. As well as enhanced response behaviour, this results in a noticeable improvement in performance capability and torque output.