A fully-hydraulic steering unit (1) is described,with a housing (2) which has an internal bore (3) inwhich, inter alia, a control channel (6) and a tankchannel (7) are arranged, with an outer sliding member(4) rotatably mounted in the internal bore (3) and aninner sliding member (5) rotatably mounted in the axialinternal bore of the outer sliding member, which innersliding member has servo openings (8) and tank bores(9). Furthermore, a pressure slot for receiving afluid producing a pressure between the inner slidingmember and the outer sliding member is provided.With a steering arrangement of this kind, there isa risk that a pressure prevailing in the controlchannel (6) will act from the outside on the outersliding member so that it jams on the inner slidingmember. Furthermore there is a danger that a pressureacting in the pressure slot will act from the inside onthe outer sliding member so that it jams against thehousing. With the present invention, jamming of theouter sliding member is prevented in every operationalposition.For that purpose, the pressure slot (12) ispermanently in connection with the control channel (6)by way of an open fluid path (10, 11).
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