Remove/install AdBlue(R) metering valve

AR49.20-P-2000MFF

Remove/install AdBlue(R) metering valve

29.11.2019

Engine

654 in model 118, 177, 247

Modification notes

28.11.2019

Document completely revised.

1

Thermal insulation

5

Screw

2

AdBlue® line

6

Clip

3

Electrical connector

Y129

AdBlue® metering valve

4

Coolant hoses

 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

 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 burns and injury when working on the diesel particulate filter and health hazard from inhalation of soot particles

Wear protective gloves, safety glasses and respiratory protection.

AS49.20-Z-0001-01A

 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

Topical note

Notes on coolant

AH20.00-N-2080-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

 

Remove/install

1

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

2

Remove the thermal insulation (1).

3

Release and disconnect the AdBlue® (2) line on the AdBlue® (Y129) metering valve and collect any escaping AdBlue®.

4

Clean the AdBlue® (2) line connection with a lint-free rag.

5

Seal the openings with suitable stop plugs.

 Record plug

*129589009100

6

Release and disconnect electrical connection (3).

7

Disconnect the coolant hoses (4).

 Clamp

*000589543700

8

Remove the coolant hoses (4) and collect any escaping coolant and

 Installation: Replace clamps.

 Hose clamp pliers

*454589003700

9

Seal openings with suitable stop plug.

 Record plug

*129589009100

10

Loosen screw (5) of the clamp (6) and remove AdBlue® metering valve (Y129).

 Installation: Install new clamp (6) with screw (5).
The clamp (6) comprises two sections and is preassembled.
Do not unscrew the screw (5) during assembly.

 Clamp/bolt, AdBlue® metering valve to exhaust aftertreatment unit

*BA49.10-P-1010-02V

11

Clean exposed exhaust gas flange and seal with protective covers.

 Set of protective caps

*001589009100

12

Install new profiled seal on the AdBlue® metering valve (Y129).

13

Install in the reverse order.



Check

14

Check coolant level and correct.

AR20.00-P-1142MFF

 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

15

Perform engine test run and check engine for proper operation and leak tightness.

 Exhaust system

Number

Designation

Engine 654 in model 118

Engine 654 in model 177

BA49.10-P-1010-02V

Clamp/bolt, AdBlue® metering valve to exhaust aftertreatment unit

Nm

8

8

 Exhaust system

Number

Designation

Engine 654 in model 247

BA49.10-P-1010-02V

Clamp/bolt, AdBlue® metering valve to exhaust aftertreatment unit

Nm

8