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Removing and installing brake master cylinder > < Front brake calipers

Leon Mk1

High and low pressure testing
High and low pressure testing
Consult the equivalence table for tools and equipment according to applicability between Seat / VW / Audi / Skoda → Chapter.
Special tools and workshop equipment required
   
t  Brake tester -V.A.G 1310A-
Before starting:
Make sure that the brake system (master cylinder, brake hoses, brake lines and brake callipers) works properly and is free of leaks.
High-pressure test:
  W00-0562
–  Remove the bleeding bolt from one of the front brake callipers. Connect the brake system tester -V.A.G 1310A- and then bleed the system.
  V47-0133
–  Insert brake pedal actuator -V.A.G 1869/2- between brake pedal and driver's seat.
–  Apply pressure to brake pedal until the gauge indicates a pressure of 50 bar.
The pressure must not drop by more than 4 bar within the test period of 45 seconds.
Renew hydraulic unit if drop in pressure exceeds the above figure.
Low-pressure test:
–  Retract the brake pedal block -VAG 1869/2- until the pressure gauge indicates 6 bar of pressure.
–  The pressure should not drop by more than 1 bar within the test period of 3 minutes.
Renew hydraulic unit if drop in pressure exceeds the above figure.
  A44-0020

Removing and installing brake master cylinder > < Front brake calipers