Check electric vacuum pump

AR43.05-S-0002F

Check electric vacuum pump

18.12.2019

Engine

780.701/702 in model 447

Modification notes

16.12.2019

Method extended

Operation steps 1, 8

16.12.2019

Basic data references replaced

Operation steps 5, 7

Shown with engine 780.701

1

Vacuum tester

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Topical note

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A



Check

1

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

2

Reduce vacuum in brake booster by depressing brake pedal several times.

3

Attach vacuum tester (1) to brake booster.

AR43.10-S-0024-01E

 Test connection

*168589086300

 Vacuum tester

*201589132100

4

Actuate electric vacuum pump using diagnostic device.



AD00.00-S-2000-04E

5

Read off measurement value after 30 s on vacuum tester (1).

Vacuum in hose after electric vacuum pump has been actuated for 30 s

*BE43.05-N-1004-01A

If a deviation from the specified value is determined,



Check vacuum line for damage.

If the vacuum line is damaged,



replace vacuum line.

 Repeat test procedure after replacing vacuum line.

If another deviation from the specified value is determined,



replace electric vacuum pump.

AR43.05-S-0001F

6

End actuation of electric vacuum pump using diagnostic unit.



AD00.00-S-2000-04E

7

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

Vacuum in hose after electric vacuum pump has been at a standstill for 30 s

*BE43.05-N-1005-01A

If a deviation from the specified value is determined,



Check vacuum line for damage.

If the vacuum line is damaged,



replace vacuum line.

 Repeat test procedure after replacing vacuum line.

If another deviation from the specified value is determined,



replace electric vacuum pump.

AR43.05-S-0001F

8

Switch off ignition and store transmitter key outside of transmission range (min. 2  m).

9

Reduce vacuum in brake booster by depressing brake pedal several times.

10

Detach 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 780

BE43.05-N-1004-01A

Vacuum in hose after electric vacuum pump has been actuated for 30 s

bar

0,8

Check values for vacuum pump

Number

Designation

Model 447 with engine 780

BE43.05-N-1005-01A

Vacuum in hose after electric vacuum pump has been at a standstill for 30 s

bar

 0,75