Remove/install metering device for exhaust aftertreatment system

AR14.40-W-2002A

Remove/install metering device for exhaust aftertreatment system

22.3.11

26.1.07

"Make sure that no AdBlue escapes from the AdBlue feed hose (10) onto the electrical connectors, as this may lead to damage to the metering device (7)" added.

Operation step 3

Sequence of operation steps revised.

Operation steps 3 and 5

 

Remove/install

 Danger!

Risk of burn injuries and scalding when working at AdBlue lines and the components attached to them. Risk of injury to skin and eyes when handling AdBlue. Risk of poisoning caused by swallowing AdBlue

Pour AdBlue into suitable containers only. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.

AS14.40-Z-0001-01A



Notes on use, material properties and handling of AdBlue®

AH14.40-N-0001-01A

1

Switch off ignition

2

Remove injection line (11)

 Installation: Replace injection line (11) each time it is removed.

AR14.40-W-2001A

3

Detach AdBlue feed hose (10) on line fitting (1)

 Make sure that no AdBlue can drip from the AdBlue feed hose (10) onto the electrical connectors, as this may lead to damage to the metering device (7).

 Installation: Before assembling check the AdBlue feed hose (10) for foreign objects, contamination and damage.

If the AdBlue feed hose (10) is reused, in the area in which the hose clamp was seated it must be shortened by approx. 2 cm.

If as a result the AdBlue feed hose (10) should be too short, it must be replaced.

Replace 1-ear clamp.

4

Detach compressed air line (8) at metering device (7)

 Seal bore with suitable stop plug.

 Installation: Prior to assembly, inspect banjo union of the compressed air line (8) for foreign bodies, contaminants and damage.



*BA14.40-N-1033-02A

5

Disconnect electrical connectors at metering device (7)

6

Remove line fitting (1) on metering device (7)

 Only when metering device (7) is to be replaced.

 Before detaching the line fitting (1) it is absolutely essential that the AdBlue feed hose be detached otherwise it may leak.

 Installation: Install new gasket



*BA14.40-N-1034-02A

7

Remove metering device (7) with decoupling jack (4)



*BA14.40-N-1005-02A

 Installation: If a metering device (7) without heating element (R28) was installed, a new metering device (7) with heating element (R28) must be installed and the following work additionally performed:



- Install larger heat shield (12).

- Install wiring harness for the heating element (R28) of metering device (7).

AR14.40-W-2036A



Metering device for exhaust aftertreatment system modified

BT14.40-W-0002-01A

8

Install in the reverse order

Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

9

Start engine

10

Run engine and inspect metering device (7) for leaks

Number

Designation

Engine 541.9
with code MS4
or code MS5

Engine 542.9
with code MS4
or code MS5

BA14.40-N-1005-02A

Metering device on bracket

Nm

25

25

BA14.40-N-1033-02A

Banjo bolt, compressed air line to metering device

Nm

15

15

BA14.40-N-1034-02A

Pipe connection for AdBlue input to metering device

Nm

22

22