Travel drives are multi-stage planetary gears that are predominantly driven hydraulically by fixed or variable displacement motors. For larger travel drives, several hydraulic motors are frequently used, whose power is accumulated via a spur gear as the input stage. The output is usually transmitted via the internal geared wheel to a tumbler, which can be supplied as an option.
There are essentially two different types - on the one hand there are very compact coaxial units, ideal for excavators, on the other hand, the travel drive is equipped with an input spur gear that enables greater ground clearance of the machine, a typical requirement for crawler tractors or loaders.
Liebherr travel drives have proved themselves by their robust construction and optimised sealing systems, such as double mechanical seals in the most rugged conditions, and have distinguished themselves especially by their excellent quality and ease of maintenance. Liebherr travel drives have been successfully used in a wide range of crawlers and tracked vehicles.
Liebherr designs its travel drives with the individual customer in mind, and a wide range of output torques, transmission ratios and dimensions are available. Liebherr also offers a standard series consisting of 11 transmission sizes, which covers a wide variety of applications.