Hydraulic module, in particular for generating pressure and/or controlling pressure in a slip-controllable brake system of a motor vehicle, and mounting method for a hydraulic module

A hydraulic module for generating and/or controlling a brake pressure in a slip-controllable vehicle brake system, the hydraulic module comprising:

• a housing block in which a cylinder bore is formed;
• a piston of a piston pressure generator accommodated in the cylinder bore and delimiting a working chamber;
• and
• a transmission by which the piston can be driven to perform an axial movement in a pressure increase direction and in a pressure decrease direction opposite to the pressure increase direction, wherein a volume of the working chamber decreases when the piston moves in the pressure increase direction, and increases when the piston is driven in the pressure lowering direction;
• wherein a circumferential guide gap, which is sealed toward the working chamber by a seal assembly is arranged between a circumference of the piston and a wall of the cylinder bore;
• and
• a guide element is provided on a side of the seal assembly that faces away from the working chamber, wherein, with the guide element, the piston can be circumferentially radially supported in the cylinder bore, wherein the guide element is accommodated in a receiving groove on the wall of the cylinder bore in such a way that the guide element projects radially in part into the guide gap.

A mounting method for a hydraulic module, comprising the following steps:

• providing a housing block having a cylinder bore formed therein, and a receiving groove for a guide element in an interior of this cylinder bore;
• inserting a mounting sleeve into the cylinder bore;
• inserting a guide element into the mounting sleeve;
• and
• applying a directed propelling force in a direction of a longitudinal direction of the cylinder bore to the guide element until the guide element exits the mounting sleeve at an opposite end and snaps into the receiving groove.