Remove/install metering device for exhaust aftertreatment system

AR14.40-B-2002TB

Remove/install metering device for exhaust aftertreatment system

05.02.2018

Engine

457.9 in model 934, 958.4

Engine

457.911 in model 695.023/053

Engine

460.984 in model 934, 938

1

Intake connection of AdBlue

6

AdBlue / Air mixture outlet connection

B129

AdBlue pressure sensor

2

Intake of AdBlue

7

Metering unit

B130

AdBlue temperature sensor

3

Compressed air inlet

8

Compressed air piping

Y109

AdBlue metering unit

4

Sleeves

9

Compressed air connection

5

AdBlue / Air mixture outlet

B128

Compressed air pressure sensor

 Warning

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

 

Remove/install

1

Remove injection pipe

.

AR14.40-B-2001TB

2

Turn off ignition

3

Detach the electric connectors at the metering unit (7)

 Installation: Ensure the harness is secured with plastic clips, so that the electrical connection rubber gloves are folded down towards metering unit (7), preventing the entry of water. Otherwise damage may occur.

4

Remove the compressed air pipe (8) at the metering unit (7)

 Close the bores using proper plugs.

 Installation: Check the compressed air connection (9) and the compressed air piping (8) for foreign bodies, dirt or damages.

 Socket connection system of - "SCHÄFER SDF" compressed air in metallic material

*BA00.18-B-1003-01A

5

Disconnect the AdBlue supply hose AdBlue from connection (1) and move it to the side

 Installation: Check AdBlue supply hose for foreign bodies, dirt or damages.

6

Remove fitting (1) from metering unit (7)

 Only when metering unit (7) is replaced.

 AdBlue inlet pipe opening on dosage unit

*BA14.40-B-1034-02C

7

Remove the metering unit (7) with the bushings (4)

 Dosage unit on support

*BA14.40-B-1005-02C

Check the bushings (4), if necessary, replace.



Replace.

 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

8

Install on the reverse order

9

Starting engine

10

With the engine running, check the metering unit (7) for tightness

 Compressed air piping

Number

Designation

Model all (BUS, TRUCK)

BA00.18-B-1003-01A

Socket connection system of - "SCHÄFER SDF" compressed air in metallic material

M10

Nm

5

 Exhaust gas after-treatment

Number

Designation

Engine 457.9; 460.984 except Liquid Only

BA14.40-B-1005-02C

Dosage unit on support

Nm

25

 Exhaust gas after-treatment

Number

Designation

Engine 457.9; 460.984 except Liquid Only

BA14.40-B-1034-02C

AdBlue inlet pipe opening on dosage unit

Nm

22