Liebherr develops its biggest ever dozer

Liebherr is making a major step in the bulldozer market with the launch of its new PR 776 model. This is the firm’s biggest ever bulldozer and also the first hydrostatically powered crawler tractor in the 70tonne weight class. The firm claims that the machine offers significantly lower fuel consumption than other bulldozers in this class, while its hydrostatic drive also helps reduce wear and tear on tracks and chains, a key cost saving. The dozer has been designed to make it easy to use with a joystick co
January 6, 2017 Read time: 3 mins
Liebherr’s PR776 is the largest hydrostatic dozer on the market and the firm’s largest ever bulldozer
718 Liebherr is making a major step in the bulldozer market with the launch of its new PR 776 model. This is the firm’s biggest-ever bulldozer and also the first hydrostatically-powered crawler dozer from any manufacturer to compete in the 70tonne weight class.

The firm claims that the machine offers significantly lower fuel consumption than other bulldozers in this class, while its hydrostatic drive also helps reduce wear and tear on tracks and chains, a key cost saving.

Unlike previous dozers from the firm however, the new PR776 features a high drive system that is said to help deliver high traction. As with other hydrostatic dozers, the PR776 is said to have good manoeuvrability and can also maintain traction while turning under load.

The dozer has been designed to make it easy to use with a joystick control as well as a good all-round view of the blade edges and the surrounding area. Power comes from a 12-cylinder Liebherr diesel delivering 565kW. The PR 776 has a maximum operating weight of 74tonnes and is equipped with an 18m³ semi-U blade or a 22 m³ U blade.

The ECO function is standard for all Liebherr Generation 6 dozers, including the new PR 776 and this allows operators to choose between high performance and maximum efficiency. The ECO control system enables greater travel drive efficiency in light to medium operations, and also provides greater fuel savings.

The proactive power control is another innovation and engine power can be automatically increased for a brief period if needed. As well as responding more rapidly, the machines offer an increase in performance and pulling power and a higher reverse speed.

The intelligent engine management system combines with the power efficiency system and hydrostatic to maintain constant engine speed, increase overall machine efficiency and reduce fuel consumption. Liebherr has also custom-developed different configuration packages in-house for extreme applications such as deserts where extreme climates and low temperatures are common.

The standard Liebherr fleet management system LiDAT provides an accurate, efficient overview of essential servicing work, warning messages, the machine’s position and actual consumption data and filling levels.

Depending on the agreement with the customer, the data is updated several times a day and can be called up whenever needed via the internet.

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