Checking check valve

AR43.10-P-0023I

Checking check valve

2.6.97



Check

1

Press the brake pedal several times until the vacuum in the brake booster is reduced

2

Connect tester (030) to brake booster

 Measuring connection (031) for checking the check valve (17) and/or brake booster (16).

AR43.10-P-0024-01I

 Vacuum tester

*201589132100

 Test connection

*168589086300

3

Start the engine and produce a vacuum of 0.75 to 0.80 bar by opening the throttle and suddenly releasing the accelerator pedal

 Reduce vacuum >0.8 bar by depressing the brake pedal.

4

Switch off engine

 Vacuum must not drop by more than 0.2 bar within 30 seconds.

Vacuum loss > 0.2 bar, replace vacuum line, if necessary: 

Check brake servo

AR43.10-P-0325I

5

Disconnect tester (030) from brake booster

 Vacuum tester

*201589132100

 Test connection

*168589086300