ABS MK II - VWClub.BG

- Unscrew fastening nut at hydraulic modulator (bulkhead) and take outhydraulic modulator.Dismantling and assembly of hydraulic modulator:Note: Renew all seals and O-rings at hydraulic modulator when performingrepairs.Installation:- Installation is performed in reverse order.- Bleed brake system; refer to Section - Special features -Note: As of 01.90 the pressure switch is installed in the hydraulic-pumphousing. On replacing the hydraulic pump, the opening in the brake mastercylinder is to be sealed with a screw plug (commercially available) and thepressure switch is to be screwed into the housing of the hydraulic pump.Recommendation: For safety reasons, renew the corresponding relays in theevent of a defect in the solenoid valves or hydraulic pump.1 = Tandem brake master cylinder2 = Solenoid-valve block3 = High-pressure pump4 = Main solenoid valve5 = Brake-line connection, wheel-brake cylinder, rear axle6 = Brake-line connection, wheel-brake cylinder, front left7 = Brake-line connection, wheel-brake cylinder, front right8 = Pressure regulator; only installed with rear disk brakesFor safety reasons, do not further disassemble components, but rather onlyreplace complete.