Remove/install AdBlue(R) metering valve

AR49.20-P-2000OLI

Remove/install AdBlue(R) metering valve

29.11.2019

Engine

654 in model 205, 253

Engine

656 in model 253

Shown on engine 654

2

Heat protection insulation

3

 AdBlue® line

4

Electrical connector

5

Clamps

6

Coolant hoses

7

Clip

8

Catalytic converter

Y129 

 AdBlue® metering valve

 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

 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

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Notes on use, material properties and handling of AdBlue®

AH14.40-N-0001-01A

 

Remove/install

1

Remove upper engine cover.



Engine 656 in model 253

AP01.10-P-2405-01L

Engine 654 in model 205, 253

AR01.10-P-2405OLI

 Installation: Only install upper engine cover after the leak test.

2

Open heat protection insulation (2).

3

Release, remove AdBlue® line (3) at AdBlue® metering valve (Y129) and collect escaping AdBlue®.

4

Clean connection of AdBlue® line (3) with lint-free rag.

5

Seal openings at AdBlue® line (3) and at AdBlue® metering valve (Y129) with suitable stop plugs.

 Record plug

*129589009100

6

Release and disconnect electrical connector(4).

7

Remove cap from coolant expansion reservoir.

AR20.30-P-4950LW

 Installation: Only attach cap after leak test of engine cooling system.

8

Disconnect coolant hoses (6).

 Clamp

*000589543700

9

Remove coolant hoses (6) from AdBlue® metering valve (Y129) and collect escaping coolant.

 Installation: Replace clamps (5).

 Hose clamp pliers

*003589033700

10

Seal openings at AdBlue® metering valve (Y129) with suitable stop plugs.

 Record plug

*129589009100

11

Open clamp (7) and remove AdBlue® metering valve (Y129).

 Installation: Replace clamp (7) and seal.

 Engine 656 in model 253Bolt, clamp for AdBlue® metering valve to catalytic converter

*BA49.20-P-1004-03A

 Engine 654 in model 205
Engine 654 in model 253Bolt, clamp for AdBlue® metering valve to catalytic converter

*BA14.40-P-1005-02E

12

Clean seat of AdBlue® metering valve (Y129) at catalytic converter (8) with clean rag.

13

Seal opening at catalytic converter (8) with protective cover.

 Set of protective caps

*001589009100

14

Install in the reverse order.

15

Check engine cooling system for leak tightness.

AR20.00-P-1010LW

16

Read out and delete fault memory.



AD00.00-P-2000-04B

 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

Carry out engine test run and check engine for proper leaktightness and leaktightness.

18

Install upper engine cover.



Engine 656 in model 253

AP01.10-P-2405-01L

Engine 654 in model 205, 253

AR01.10-P-2405OLI

 Exhaust aftertreatment

Number

Designation

Engine 654 in model 205

Engine 654 in model 253

BA14.40-P-1005-02E

Bolt, clamp for AdBlue® metering valve to catalytic converter

Nm

8

8

 Exhaust aftertreatment

Number

Designation

Engine 656 in model 253

BA49.20-P-1004-03A

Bolt, clamp for AdBlue® metering valve to catalytic converter

Nm

8