Abstract: A hydraulic release mechanism for automobile clutches comprising a housing open at one end and a bearing. The bearing comprises a rotating race ring adapted to be connected to the operating member of the clutch, a non-rotating race ring and a plurality of rolling elements located therebetween. The non-rotating race ring is slidably arranged with respect to the housing, and seal means is arranged between the housing and the axial frontal end of the non-rotating race ring to enclose space between the sliding surfaces while permitting the race ring to move on introduction of pressurized fluid into the housing.