Brake Master Cylinder: Testing and Inspection

Pressure leak test
Special tools and workshop equipment required





^ VAG 1310 A Brake system test unit

Test prerequisites:
^ Function and proper seal of brake system (hydraulic unit, brake hoses, brake lines and brake calipers).
^ Remove bleed screw at one of the front brake calipers. Connect pressure gauge from VAG 1310 and bleed.
^ Apply pressure to brake pedal until the gauge indicates a pressure of 50 bar. The pressure must not drop by more than 4 bar during the test period of 45 seconds. If pressure drops greatly replace master cylinder.