Hydraulic piston machine

A hydraulic piston machine, comprising:

• a plurality of pistons (12, 14) which are driven by a drive/output shaft (40), guided in an axially displaceable manner in a piston barrel (4) of a housing (2), and, in each case, bound one working chamber (44) into which the pressure medium may be fed via a suction valve (46), and from which the pressure medium may be discharged via a pressure valve (48), wherein the housing (2) comprises at least one further housing part (6) which is connected to the piston barrel (4) on the front side,
• wherein the suction valves (46) and pressure valves (48) are situated in the region of a parting plane (50) between the housing parts (4, 6), in housing receptacles (52, 54), approximately axially parallel to the longitudinal axis of the piston machine, and wherein the pressure valves (48) are situated on a common partial circle (72) having a larger diameter than that of a common partial circle 74 of the suction valves (46), wherein a partial circle (75) of the pistons (12) is situated between drive/output shaft (40) and the partial circle (74) of the suction valves (46),
• wherein a closing body (80) of each suction valve (46) is preloaded via at least one closing spring (82) bearing against the piston barrel (4), against a valve seat (84) of a seat ring (86) inserted in the piston barrel (4);
• seat ring (86) bears against a front side (92) of the housing part (6).