Update in the 50 tonn category

November 8 2017

On the occasion of the Liebherr Information Tour for the International Construction Trade Press was shown new crawler tractor PR 766.

Innovative engine management, proactive power adjustment and Eco mode to optimise machine performance and fuel consumption

Stage IV/Tier 4 emission standards by means of SCR only (without diesel particulate filter)

Work efficiently, safely and comfortably thanks to the continued development of ergonomics 

Successful Liebherr drive technology ensures a high level of reliability

With operating weights of between 46,200 kg and 54,200 kg, the PR 766 is the successor model to the successful PR 764. The latest model in the crawler tractor generation is driven by a powerful 310 kW (422 hp) 8-cylinder V-engine. 

The diesel unit in the PR 766 embodies the latest generation of Liebherr engine technology and therefore complies with Stage IV/Tier 4 emission standards. In this generation of engines, Liebherr combines emission reduction in compliance with the applicable standards with additional combustion savings in two technological steps. 

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. The unit therefore always runs at the optimum efficient speed. The fact that speed fluctuations are avoided, sets the Liebherr travel drive apart from all other large crawler tractor drive concepts currently available on the market. Essential drivetrain components are developed in-house and optimally coordinated, which increases the efficiency of the system as a whole. 

As with all of Liebherr's Generation 6 crawler tractors, the PR 766 comes equipped with the ‘ECO function’ .