Hydraulic System: Testing and Inspection

Leak Test Under Pressure
Special Tools And Equipment





VAG 1310 or VAG 1310A brake pressure gauge

Requirement
- Brake system (hydraulic unit, brake hoses, brake lines and brake calipers) operating properly and free of leaks

Testing
- Remove bleeder screw at one front brake caliper. Connect pressure gauge VAG1310 or VAG1310A and bleed.
- Insert brake pedal depressor between brake pedal and driver's seat. Apply pressure to brake pedal until gauge indicates pressure of 50 bar (725 psi).
- The pressure must drop by not more than 4 bar (58 psi) during the test period of 45 seconds

If the pressure drop is greater:
- Replace brake master cylinder.