Checking check valve

AR43.10-P-0023EW

Checking check valve

27.10.10



Checking

1

Eliminate the vacuum in brake booster (A7/7)

 To do this, press the brake pedal several times with the engine switched off.

2

Open engine hood

Model 212

AR88.40-P-1000EW

Model 218

3

Connect vacuum tester (030) to brake booster (A7/7) with test connection (031)

AR43.10-P-0024-01V

 Vacuum tester

*201589132100

 Test connection

*168589086300

4

Start the engine and produce a vacuum of 0.75 to 0.8 bar by pressing and suddenly releasing the accelerator pedal

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

5

Turn off engine

 The vacuum must not reduce by more than 0.2 bar within 30 seconds.

 With vacuum loss >0.2 bar:  Install a new vacuum line (8) with check valve (17).

If necessary: 

Check brake booster.

AR43.10-P-0325EW

6

Detach vacuum tester (030) with test connection (031) from brake booster (A7/7)