Checking check valve

AR43.10-S-0023S

Checking check valve

16.02.2016

Model

636 with engine 272, 646, 651

Model

639 with engine 112, 272, 642, 646, 651

Modification notes

04.12.2015

Unterdruck im Schlauch nach 30 s Motorlauf

Typ 636, 639

BE43.05-N-1001-01A

12.01.2016

Method adapted

Operation steps 1 to 6

12.01.2016

Basic data added

Operation step 3

1

Vacuum tester

 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



Check

1

Attach vacuum tester (1) to brake booster

AR43.10-S-0024-01S

 Test connection

*168589086300

 Vacuum tester

*201589132100

2

Start engine

3

Read off measurement value

 Read off the measurement value on the vacuum tester (1) after 30 s and 50 s. When doing so, keep the engine at idle speed for at least 50 s.

Vacuum in hose after engine has been running for 30 seconds

*BE43.05-N-1001-01A

Vacuum in hose after engine has been running for 50 seconds

*BE43.05-N-1003-01A

4

Turn off engine

5

Read off measurement value

 After 30 s, read off the measurement value on the vacuum tester (1). The vacuum is permitted to drop by max. 0.2 bar in 30 s.

Vacuum in hose after engine OFF for 30 seconds

*BE43.05-N-1002-01A

With a vacuum loss greater than 0.2 bar



Replace vacuum line with check valve and check brake booster

AR43.10-S-0325S

6

Remove vacuum tester (1) at brake booster

AR43.10-S-0024-01S

 Test connection

*168589086300

 Vacuum tester

*201589132100

Check values for vacuum pump

Number

Designation

Model 636, 639

BE43.05-N-1001-01A

Vacuum in hose after engine has been running for 30 seconds

bar

0,8

Check values for vacuum pump

Number

Designation

Model 636, 639

BE43.05-N-1002-01A

Vacuum in hose after engine OFF for 30 seconds

bar

0,75

Check values for vacuum pump

Number

Designation

Model 636, 639

BE43.05-N-1003-01A

Vacuum in hose after engine has been running for 50 seconds

bar

0,9