Remove/install metering device for exhaust aftertreatment system

AR14.40-B-2002TC

Remove/install metering device for exhaust aftertreatment system

23.10.2019

Engine

924 in model 694.000/042

Engine

924 in model 958.0/1, 979.023/026/028/073/076/078

Engine

926.9 in model 693.298/328/388, 695.010/011/304

Engine

926.9 in model 958.0/1

1

Intake connection of AdBlue

6

AdBlue / Air mixture outlet connection

B128

Compressed air pressure sensor

2

Intake of AdBlue

7

Metering unit

B129

AdBlue pressure sensor

3

Compressed air inlet

8

Compressed air piping

B130

AdBlue temperature sensor

4

Sleeves

9

Compressed air connection

Y109

AdBlue metering unit

5

AdBlue / Air mixture outlet

10

AdBlue supply hose

7

Metering unit

11

Electric wiring harness

 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

 

Remove/install

 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

1

Remove injection pipe

Remove/install injection line for exhaust aftertreatment system

AR14.40-B-2001TC

Notes on use, material properties and handling of AdBlue®

.

AH14.40-N-0001-01A

 Installation: Replace the injection pipe after each removal.

2

Turn off ignition

3

Detach the electric connectors from the metering unit (7)

 Installation: Observe that the electric wiring harness (11) is fastened with plastic catches so that the rubber sleeves (arrows) of the electric connections are folded down in relation to the metering unit (7), avoiding water penetration.

4

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

 Seal the orifice with an adequate closing plug.

 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

Release the AdBlue supply hose (10) from the AdBlue inlet connection (1) and move it aside

 Make sure AdBlue does not splash from the AdBlue flow hose on the electric connections, because it may damage the AdBlue metering unit (7).

 Installation: Before the assembly check the AdBlue flow hose, for foreign matter, dirt and damages, replace if necessary.

6

Remove AdBlue inlet fitting (1) from metering unit (7)

 Only when metering unit (7) is replaced.

 .AdBlue inlet pipe opening on dosage unit

*BA14.40-B-1034-02B

7

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

 Installation: Remove the bushings (4). If necessary, replace it.

 .Dosage unit on support

*BA14.40-B-1005-02B

8

Install in 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 924.9, 926.9 except Liquid Only

BA14.40-B-1005-02B

Dosage unit on support

Nm

25

 Exhaust gas after-treatment

Number

Designation

Engine 924.9, 926.9 except Liquid Only

BA14.40-B-1034-02B

AdBlue inlet pipe opening on dosage unit

Nm

22