High and Low Pressure Testing

High and Low Pressure Testing

Special tools, testers and auxiliary items required

• Brake pressure gauge 0-250 bar (V.A.G 1310A)

Before beginning:

Check brake system (brake master cylinder, brake hoses, brake lines and brake calipers) for proper seal and function.

High pressure testing:

- Remove bleeder screw at one of the front brake calipers. Connect brake pressure gauge (V.A.G 1310A) and bleed.






- Install the brake pedal loading device (V.A.G 1869/2) between the 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.

If pressure drop is large, replace hydraulic unit.

Low pressure testing:

- Push the brake pedal loading device (V.A.G 1869/2) back until 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.

If pressure drop is large, replace hydraulic unit.