Longitudinally adjustable reversible axial piston machine

A reversible axial piston machine having a cylinder drum which rotates about an axis of rotation and in the cylinder cutouts of which pistons, which are supported against an inclined surface, are movable, a control angle (α1, α2) of said inclined surface being adjustable by an adjusting device, the adjusting device having a control piston which adjusts the control angle (α1, α2) in both pivotal directions and extends with a substantial direction component parallel to the direction of the axis of rotation of the cylinder drum, wherein a zero position of the inclined surface, in which the inclined surface is oriented perpendicularly to the axis of rotation of the cylinder drum, can be set without play by a zero-position setting device;

• the zero-position setting device comprising a first adjusting rod which is positionably guided in a stepped cutout of the control piston, said cutout extending in the direction of the longitudinal axis of the control piston, and positions the control piston in the two directions of its longitudinal axis, wherein the control piston is guided in a hollow cylinder which has a first step on the inside and whereof a first opening, which is oriented in the direction of the inclined surface, is not closed in order to also enable an axial movement of the control piston outside the hollow cylinder, and whereof a second opening, which is oriented away from the pivot balance, is closed by a closing cover.