Remove/install pressure transducer for boost pressure aneroid capsule

AR09.40-S-1003E

Remove/install pressure transducer for boost pressure aneroid capsule

25.03.2020

Model

447 with engine 651

Modification notes

24.03.2020

Information added.

Operation steps 4, 6

24.03.2020

Method extended.

Operation step 10

1

Brake fluid reservoir

6

Screw

10

Vacuum hoses

2

Brake booster

7

Exhaust gas recirculation line

11

Screw

3

Vacuum line

8

Screws

12

Screw

4

Check valve

9

Electrical connector

Y93/1

Boost pressure control flap pressure transducer

5

Holder

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 Caution

Risk of poisoning from swallowing brake fluid. Risk of injury from skin and eye contact with brake fluid

Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid.

AS42.50-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Brake fluid notes

AH42.50-P-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

 

Remove/install

1

Remove air filter housing.

AR09.10-S-1150E

2

Remove engine cover.

AR01.10-S-2405E

3

Disconnect electrical connector of fill level sensor on brake fluid reservoir (1).

4

Remove the brake fluid reservoir (1) and take out of the working area..


Make sure that no brake fluid escapes from the brake fluid reservoir.
Brake fluid can lead to paint damage.

 Do not extract brake fluid; brake fluid reservoir (1) is not completely removed.

 Installation: Check expansion rivet for damage.

If damage exists:



Replace expansion rivet.

5

Remove vacuum reservoir.

AR07.09-S-0001E

6

Remove vacuum line (3) with check valve (4) from brake booster (2).

 Installation: Check seal for vacuum line (3) in brake booster (2) for damage and leak tightness.

If seal is damaged or no longer seals correctly:



Replace seal.

7

Detach vacuum line (3) from holder (5).

8

Remove holder (5).

 To do this, remove screw (6).

9

Remove exhaust gas recirculation line (7).

 To do so, remove screws (8).

 Installation: Replace seals.

 Bolt, exhaust gas recirculation line to bypass flap

*BA14.20-N-1034-01H

 Bolt, exhaust gas recirculation line to charge air line

*BA14.20-N-1033-01H

10

Expose electrical wiring harness from the temperature sensor downstream of the exhaust gas recirculation cooler.

Model 447 with engine 651
with code MB6 (Low-emission vehicle, Euro 6 Gr. 1)
Model 447 with engine 651
with code MR6 (Emissions category Euro 6c N1 GR.III/N2)

AR14.20-S-1025E

 To do so, disconnect electrical connector.

11

Disconnect electrical connector (9).

12

Remove vacuum hoses (10).

 Removal: Mark assignment of vacuum hoses (10).

 Installation: Check vacuum hoses (10) for damage. Observe assignment of vacuum hoses (10) relative to the connections on boost pressure control flap pressure transducer (Y93/1).

If damage is present:



Replace vacuum hoses (10).

13

Loosen screw (11).

14

Remove screw (12).

15

Remove boost pressure control flap pressure transducer (Y93/1).

16

Install in the reverse order.



Check

 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

17

Check for leaktightness when engine is running.

 Visual inspection only.

 Exhaust gas recirculation

Number

Designation

Engine 651 in model 447

BA14.20-N-1033-01H

Bolt, exhaust gas recirculation line to charge air line

Nm

9

 Exhaust gas recirculation

Number

Designation

Engine 651 in model 447

BA14.20-N-1034-01H

Bolt, exhaust gas recirculation line to bypass flap

Nm

10