Check electric vacuum pump

AR43.05-D-0002TE

Check electric vacuum pump

26.11.2019

Model

910 with engine 780.703

1

Check valve

2

Brake booster

3

Test connection

4

Test hose

 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

Reduce vacuum in brake booster (2) by depressing the brake pedal several times in succession.

2

Remove check valve (1) from brake booster (2).

3

Mount test connection (3) onto brake booster (2).

 Test connection

*168589086300

4

Mount test hose (4) of vacuum tester onto test connection (3).

 Test connection

*168589086300

 Vacuum tester

*201589132100

5

Mount check valve (1) onto test connection (3).

 Test connection

*168589086300

6

Actuate electric vacuum pump using vehicle diagnosis system and read off measurement value.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 Read off measurement value after 30 s on  vacuum tester.

Vacuum in hose after 30 s of engine running or after 30 s of electric vacuum pump actuation

*BE43.05-N-1001-01TS

7

End actuation of electric vacuum pump and read off measurement value.



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 After the actuation has been completed, read off the measurement value immediately on the  vacuum tester.

 Vacuum must drop within 10 minutes by a maximum of 0.2 bar.

Vacuum in hose after 10 min of engine standstill or after 10 min of electric vacuum pump standstill

*BE43.05-N-1002-01TS

If the vacuum loss is > 0.2 bar,



replace electric vacuum pump.

AR43.05-D-0001TE

If the reason for the vacuum loss remains unclear,



test the check valve.

AR43.10-D-0023TS

8

Remove check valve (1) from test connection (3).

 Test connection

*168589086300

9

Remove test hose (4) of vacuum tester from test connection (3).

 Test connection

*168589086300

 Vacuum tester

*201589132100

10

Remove test connection (3) from brake booster (2).

 Test connection

*168589086300

11

Mount check valve (1) onto brake booster (2).

Check values for vacuum pump, check valve

Number

Designation

Model 907, 910

BE43.05-N-1001-01TS

Vacuum in hose after 30 s of engine running or after 30 s of electric vacuum pump actuation

to check valve

bar

 0,5

to vacuum pump

bar

 0,92

Check values for vacuum pump, check valve

Number

Designation

Model 907, 910

BE43.05-N-1002-01TS

Vacuum in hose after 10 min of engine standstill or after 10 min of electric vacuum pump standstill

to check valve

bar

 0,3