Check vacuum pump

AR43.05-S-1325E

Check vacuum pump

12.12.2019

Model

447 with engine 274, 622, 651, 654.9

Model

448 with engine 274

1

Vacuum tester

 Warning

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-0024-01E

 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

Switch off engine.

5

Read off measurement value.

 After 30 s, read off the measurement value on the vacuum tester (1).

Vacuum in hose after engine OFF for 30 seconds

*BE43.05-N-1002-01A

If a deviation from the permissible value is present,



Check vacuum lines, if necessary, replace vacuum pump.

Model 447 with engine 654.9

AR18.10-S-6019E

Model 447 with engine 622

AR43.05-S-1320EF

Model 447, 448 with engine 274

AR43.05-S-1320EG

Model 447 with engine 651

AR43.05-S-1320E

6

Remove vacuum tester (1) from brake booster.

AR43.10-S-0024-01E

 Test connection

*168589086300

 Vacuum tester

*201589132100

Check values for vacuum pump

Number

Designation

Model 447 with engine 274, 622, 651, 654
Model 448

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 447 with engine 274, 622, 651, 654
Model 448

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 447 with engine 274, 622, 651, 654
Model 448

BE43.05-N-1003-01A

Vacuum in hose after engine has been running for 50 seconds

bar

0,9