Remove/install AdBlue(R) metering valve

AR49.20-P-2000CD

Remove/install AdBlue(R) metering valve

03.07.2019

Model

204.9 with engine 651

with code U42 (BlueTEC diesel exhaust treatment (SCR))

Y129

AdBlue® metering valve

1

AdBlue® line

2

Electrical connector

3

Screw

Y129

AdBlue® metering valve

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

 Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

 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

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

Lift vehicle on vehicle lift

2

Pull back protective sheath over AdBlue® line (1)

3

Release and disconnect AdBlue® line (1) and seal openings with suitable stop plugs

 Installation: Replace sealing ring.

 Record plug

*129589009100

4

Release and disconnect electrical connector (2)

5

Unscrew screw (3) and remove clamp

 Installation: Replace clamp.

 Bolt, AdBlue® metering valve clamp to exhaust system

*BA14.40-P-1011-02A

6

Remove AdBlue® metering valve (Y129) at exhaust pipe


Ensure correct positioning of the AdBlue® metering valve (Y129). The lugs of the AdBlue® metering valve (Y129) must sit in the grooves of the exhaust pipe.
Non-observation leads to wrong assembly and damage to the AdBlue® metering valve (Y129).

 Installation: Replace seal.



Clean

7

Clean AdBlue® line (1) at connection with suitable means

8

Clean seat of AdBlue® metering valve (Y129) in exhaust pipe with suitable means and seal opening of exhaust pipe with protective cover

 Set of protective covers

*001589019100

9

Install in the reverse order

 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 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

10

Perform an engine test run and check exhaust system in the area of the AdBlue® metering valve (Y129) for leaktightness

 Exhaust aftertreatment, BlueTec

Number

Designation

Engine 651 in model 166, 204, 207, 212, 218, 221, 222
with code U42 (BlueTEC diesel exhaust treatment (SCR))

BA14.40-P-1011-02A

Bolt, AdBlue® metering valve clamp to exhaust system

Nm

5