Appliance and method for operating hydraulic excavator fitted with position sensor for purpose of sensing position of idler wheels provides variable track tension control

摘要

The excavator (10) runs on caterpillar tracks (26). These run round idler wheels (22,24) the positions of which can be adjusted to tension the track. Operation of the excavator is defined by two phases, one in which the tractor is stationary and one of the excavating tools (12,14) is operated and the track tension is increased; a second in which the excavator moves forward and the track tension is reduced