High And Low Pressure Testing
Special tools and workshop equipment required
- Brake pressure gauge 0-250 bar V.A.G 1310A
- Brake pedal actuator V.A.G 1869/2
High Pressure Testing
Brake system (brake master cylinder, brake hoses, brake lines and brake calipers) tested for function and leaks.
-- Remove bleeder screw at one of the front brake calipers. Connect V.A.G 1310 A and bleed.
-- Install V.A.G 1869/2 between brake pedal and driver 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 during the test period of 45 seconds.
Replace master cylinder if pressure drops greatly.
Low Pressure Testing
-- Set the brake pedal loading device back far enough that the pressure gauge indicates 6 bar positive pressure.
-- The pressure must not drop by more than 1 bar during a test period of 3 minutes.
Replace master cylinder if pressure drop is greater.