Portable working machine, particularly industrial truck, has brake, which is formed as hydraulically detached spring-loaded brakes, where pressure chambers upstream electrically operated brake valve device, which is formed as brake valve

摘要

The working machine has a brake, which is formed as hydraulically detached spring-loaded brakes (3a,3b). The pressure chambers (4a,4b) upstream an electrically operated brake valve device, which is formed as brake valve. The brake valve has the electrically activated switching position (I) of the pressure chamber connected with a pressure supply device. Another electrically activated switching position (II) of the pressure chamber is connected with the pressure sink. The third switching position (III) is provided in electroless condition.