Track or similar to the vehicle control members independent of the engines and direction of the two dimensions of the vehicle, to transport and handling

摘要

The tracks 1a, 1b of a hydraulic shovel can be ordered individually by two levers 9a and 9b acting on the control valves va, vb. A distributor parallel - series 8 makes it possible to pass from a slow has a rapid speed and vice versa. The present invention provides the switch 13, combined with a rapid speed pedal 10, the distributor 8 and the control levers 9a, 9b, for the reduction of the speed of the vehicle at the start of each change of direction, if the pedal 10 is pressed, and for its automatic acceleration after the change of direction. The risks of overturning of the vehicle as a result of an omission of shift the are thus deleted and the pipe is considerably facilitated.