High-power coaxial signal lines, as used for example in television transmitters, employ patch panels with coaxial connections typically 7 cm to 30 cm in diameter to permit rerouting of signals. The device includes a support bell being supported at the bearing eye in the area around the bearing bore and a pressure piece, which can be pushed axially through the bearing bore together with the component. A first directional control valve is disposed between the source of pressurized fluid and the first chamber of the first hydraulic actuator and the third chamber of the second hydraulic actuator.