Neutral setting apparatus of an adjustable hydraulic machine

Neutral setting apparatus (1) of an adjustable hydraulic machine with a housing (2) in which the following are arranged:

• an input shaft (3) which is mounted in the housing (2), with a first end (3a) to which a torque can be applied for rotating the input shaft (3) about an axis (23), and a second end (3b) on which an extension (25) which is cylindrical eccentrically parallel to the axis (23) is arranged, an adjustable control piston (4) for opening and closing hydraulic fluid passages for pressurizing
• a servo piston (24) which adjusts the hydraulic machine with regard to the volumetric delivery thereof, a lever (5), with a first end (5a) and a second end (5b), and with a bearing point (5c) which is arranged between the two ends (5a, 5b) and in which the cylindrical extension (25) of the input shaft (3) engages, wherein the first end (5a) of the lever (5) is connected in an articulated manner to the control piston (4), and the second end (5b) of the lever (5) is mounted in an articulated manner on a position feedback device (6) which transmits the position of the servo piston (24) to the lever (5), a sliding part (8) which has, at one end, a level end face (8a) with which said sliding part is supported against a level flattened portion (7a) on the input shaft (3), wherein the sliding part (8) is elastically prestressed perpendicularly to the axis (23) of the input shaft (3) and is held by a guide element (10) in such a manner that the sliding part (8) is movable relative to the guide element (10) perpendicularly to the axis (23) of the input shaft (3) and, in the neutral position of the control piston (4), the level end face (8a) and the level flattened portion (7a) rest flat on each other, wherein the guide element (10) is supported relative to the housing (2) in such a manner that the guide element (10) is rotatable relative to the input shaft (3) in the circumferential direction thereof.