The invention relates to a
hydraulic brake,
clutch, or
clutch-
brake combination for a work
machine, which is designed to be switchable by means of a hydraulic medium delivered by a
hydraulic pump (18), with a rotor disk (4) arranged on a shaft in a rotationally fixed but axially displaceable manner and with a counterpart (15) cooperating therewith, wherein the counterpart (15) is mounted axially displaceably in relation to the rotor disk (4), with a
mechanical force transmitter (17) designed to apply force to the counterpart (15) in the axial direction, and with a hydraulic
piston (13) provided by a cylinder-
piston arrangement (12), which is designed to be movable in the axial direction and is designed to act on the counterpart (15) in the event of pressure being applied with hydraulic medium delivered by the
hydraulic pump (18) in a manner counter to the force applied by the force
transmitter (17).wherein the
hydraulic pump (18) fluidically interacts with a reservoir (20) accommodating
hydraulic fluid, wherein the hydraulic pump (18) and the reservoir (20) are designed for intended use exclusively with the cylinder-
piston arrangement (12), and wherein the hydraulic pump (18) has an
electric motor (19), characterized in that a bypass line (24) is provided which fluidically bypasses the hydraulic pump (18) and fluidically connects the reservoir (20) to the cylinder-piston arrangement (12), wherein an electrically switchable valve (25) is integrated into the bypass line (24), which is designed to open the bypass line (24) in the event of a de-energized position of the valve (25), and that the
electric motor (19) and the electrically switching valve (25) are connected in terms of signals to a common control device (26), wherein the control device (26),the electrically switching valve (25), the reservoir (20) and the hydraulic pump (18) are encapsulated and housed in a common housing.,