Abstract: A switching assembly including a base body in which a plunger is accommodated so as to be linearly movable in the direction of a longitudinal axis. A switching device is provided which is actuatable by way of the plunger. The switching device has a first external thread which is arranged concentrically to the longitudinal axis and which is screwed into a first internal thread, wherein a separate lock nut is provided. A separate auxiliary body is provided, wherein the first internal thread is arranged on the auxiliary body. The first external thread is screwed into the first internal thread in such a way that the switching device is braceable to the auxiliary body. The auxiliary body has a second and a third external thread which are each arranged concentrically to the longitudinal axis. The second external thread is screwed into a second internal thread on the base body. The lock nut is screwed onto the third external thread, wherein it is braceable against the base body.

Abstract: A hydrostatic fan drive is operated with a closed circuit and includes a variable-displacement pump with a swept volume that is configured to be adjusted by an adjustment device. The variable-displacement pump is connected by two working lines to a motor that is coupled fixedly in terms of torque to a fan impeller. The fan drive further includes a feed pressure pump and an adjustment pressure line by which the adjustment device is supplied with adjustment pressure medium. A pressure cut-off valve is connected to the adjustment pressure line. The pressure cut-off valve is configured to limit an adjustment pressure, as a function of a high pressure in the working line acting as high-pressure line, to a value such that a certain value of high pressure is not exceeded. The pressure cut-off valve is configured to exhibit pilot control to regulate a working pressure of the variable-displacement pump.

Abstract: A hydrostatic fan drive is operated with a closed circuit and includes a variable-displacement pump with a swept volume that is configured to be adjusted by an adjustment device. The variable-displacement pump is connected by two working lines to a motor that is coupled fixedly in terms of torque to a fan impeller. The fan drive further includes a feed pressure pump and an adjustment pressure line by which the adjustment device is supplied with adjustment pressure medium. A pressure cut-off valve is connected to the adjustment pressure line. The pressure cut-off valve is configured to limit an adjustment pressure, as a function of a high pressure in the working line acting as high-pressure line, to a value such that a certain value of high pressure is not exceeded. The pressure cut-off valve is configured to exhibit pilot control to regulate a working pressure of the variable-displacement pump.