Leak Test
Special tools and workshop equipment required
- Brake Pressure Gauge:V.A.G 1310A
- Brake Pedal Actuator:V.A.G 1869/2 .
High Pressure Test:
- Brake system (brake master cylinder, brake hoses, brake lines and brake calipers) tested for function and leaks.
-- Remove the bleed screw at one of the front brake calipers. Connect the Brake Pressure Gauge:V.A.G 1310 A and bleed.
-- Insert the Brake Pedal Actuator:V.A.G 1869/2 between the brake pedal and driver seat. Apply pressure to the brake pedal until the pressure gauge indicates a pressure of 50 bar (725.19 psi). The pressure must not drop more than 4 bar (58.02 psi) during the test period of 45 seconds.
-- Replace the brake master cylinder if the pressure decrease is too high.
Low pressure testing:
-- Set the brake pedal actuator back far enough that the pressure gauge indicates 6 bar (87.02 psi) positive pressure.
-- The pressure must not drop by more than 1 bar (14.5 psi) during a test period of 3 minutes.
-- Replace the brake master cylinder if the pressure decrease is too high.