Remove/install diffuser at metering device of exhaust gas aftertreatment system

AR49.20-G-2043CH

Remove/install diffuser at metering device of exhaust gas aftertreatment system

15.06.2018

Engine

457.9, 458.9, 541.9, 542.9, 941.9, 942.9 in model 000.001

with BlueTec

1

Compressed air pipe

2

O-ring (green)

3

Sealing ring (permanently attached to diffuser)

4

Diffuser

5

Sealing ring (permanently attached to diffuser)

6

O-ring (green)

7

Metering device housing

8

Bolts

12

Heating element

 Warning

Risk of burn injuries and scalding when working on AdBlue(R) lines and the component parts attached to them. Risk of injury to skin and eyes when handling AdBlue(R). Risk of poisoning caused by swallowing AdBlue(R)

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

AS49.20-Z-0002-01A

Notes on use, material properties and handling of AdBlue®

AH14.40-N-0001-01A

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW



Remove

1

Remove metering device.

Engine 457.9, 458.9

AR49.20-G-2002CH

ENGINE 541.9, 542.9, 941.9, 942.9

AR49.20-G-2002CI

2

Remove diffuser (4).

AR49.20-G-2043-01CH



Install

3

Clean assembly area of the diffuser (4).


After removal, metering device must be free of any soiling in diffuser (4) assembly area.
Otherwise, damage can occur to metering device.

 Remove AdBlue® residues with a lint-free dry cloth.
For larger amounts, rinse with clean water and dry with compressed air.

4

Attach new diffuser (4).

AR49.20-G-2043-01CH

 Compressed air pipe to housing

*BA14.40-N-1044-02H

ABS sensor grease

*BR00.45-Z-1019-06A

5

Install metering device.

Engine 457.9, 458.9

AR49.20-G-2002CH

ENGINE 541.9, 542.9, 941.9, 942.9

AR49.20-G-2002CI

 Exhaust aftertreatment, BlueTec

Number

Designation

Engine 457.9, 458.9

engine 541.9, 941.9

BA14.40-N-1044-02H

Compressed air pipe to housing

Nm

6

6

 Exhaust aftertreatment, BlueTec

Number

Designation

Engine 542.9, 942.9

BA14.40-N-1044-02H

Compressed air pipe to housing

Nm

6

Repair materials

Number

Designation

Order number

BR00.45-Z-1019-06A

ABS sensor grease

A 000 989 62 51 10