Checking check valve

AR43.10-D-0023TS

Checking check valve

27.11.2019

Model

907, 910

Modification notes

27.06.2019

Work procedure revised

The whole document

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

 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

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.

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

6.1

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

Model 910 with engine 780.703



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

 Read off measurement value after 30 s actuation at  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

 Vacuum tester

*201589132100

6.2

Start engine and read off measurement value.

Model 907
Model 910 with engine 651

 Run engine for at least 30 s at idle speed while pressing the accelerator pedal sharply several times in succession.

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

*BE43.05-N-1001-01TS

7.1

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

Model 910 with engine 780.703



Connect/disconnect diagnostic unit

AD00.00-D-2000-06TS

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

 Vacuum may drop by a maximum of 0.2 bar within 10 min.

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

*BE43.05-N-1002-01TS

 Vacuum tester

*201589132100

If vacuum loss > 0.2 bar.



Install new vacuum line with check valve (1).

* Applies to Europe only



Remove/install brake booster vacuum line

AR43.10-D-0355TE

7.2

Switch off engine and read off measurement value.

Model 907
Model 910 with engine 651

 Switch off engine and immediately read off measurement value  on vacuum tester.

 Vacuum may drop by a maximum of 0.2 bar within 10 min.

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

*BE43.05-N-1002-01TS

 Vacuum tester

*201589132100

If vacuum loss > 0.2 bar.



Install new vacuum line with check valve (1).

Remove/install brake booster vacuum line
Model 910 with engine 651

AR43.10-D-0355TS

 Model 907
No reference document exists for these vehicles.

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