Checking check valve

AR43.10-D-0023H

Checking check valve

20.6.13

MODEL

906, 909

Shown on model 906

1

Vacuum tester



Check

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

1

Connect testing unit to brake booster

MODEL 906

AR43.10-D-0024-01H

MODEL 909

AR43.10-D-0024-01F

 Test connection

*168589086300

 Vacuum tester

*201589132100

2

Start engine and read off measured value

 MODEL 906 with ENGINE 642
MODEL 906 with ENGINE 646
MODEL 909 with ENGINE 646
Allow the engine to run at idle for at least 30 s.

 MODEL 906 with ENGINE 272
Allow the engine to run at idle for at least 30 s and depress the accelerator pedal sharply several times during this time.

Vacuum in hose after engine has been running for 30 seconds

*BE43.05-N-1001-01C

3

Switch off engine, read off measured value

 Switch off the engine and immediately read off the measurement value at the vacuum tester (1).

 The vacuum is permitted to drop by max. 0.2 bar in 10 min. If there is a vacuum loss of above 0.2 bar replace vacuum line with check valve.

Vacuum in hose after 10 min engine OFF

*BE43.05-N-1002-01C

4

Disconnect testing unit at brake booster

MODEL 906

AR43.10-D-0024-01H

MODEL 909

AR43.10-D-0024-01F

Check values for check valve/vacuum pump

Number

Designation

MODEL 909

Model 906

BE43.05-N-1002-01C

Vacuum in hose after 10 min engine OFF

at check valve

bar

0,3

0,3

Check values for check valve/vacuum pump

Number

Designation

MODEL 909

Model 906

BE43.05-N-1001-01C

Vacuum in hose after engine has been running for 30 seconds

at check valve

bar

0,5

0,5

at vacuum pump

bar

0,92

0,92