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Remove/Install SCR Catalytic Converter - Ar49.20-D-8120TSR

Engine 642 in model 907, Engine 651 in model 907 

Modification notes

12.12.2018 Method modified Operation steps 1, 7
G13787795
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.  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
  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
  Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove AdBlue® line and electrical connecto of the AdBlue® metering valve. IMPORTANT Do not remove AdBlue® metering valve from the SCR catalytic converter (1). AR49.20-D-2000TSR 
2 Remove NOx sensor with control unit downstream of SCR catalytic converter (1) from SCR catalytic converter (1).   AR49.20-D-2062TSV 
3 Remove soot particulate sensor downstream of SCR catalytic converter (1) from SCR catalytic converter (1).   AR07.04-D-0017TSV
4 Remove tailpipe (5). If installed.  
      AR49.10-D-7155TSR 
5 Remove clamp (3). INSTALLATION IMPORTANT : Check clamp (3).
TORQUE SPECIFICATION Clamp, diesel particulate filter to SCR catalytic converter Depending on the findings,

Replace clamp (3).
*BA49.20-N-1003-02TSR 
6 Remove SCR catalytic converter (1). IMPORTANT Aid of helper required. To do this, remove decoupling elements (2) from SCR catalytic converter (1).
INSTALLATION IMPORTANT : Check decoupling elements (2) for damage.
Depending on the findings,

replace damaged decoupling elements (2).
 
7 Install new AdBlue® metering valve. If a new SCR catalytic converter (1) is installed. AR49.20-D-2000TSR 
8 Install in the reverse order.    
INSPECT Check     
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
9 Perform engine test run and check exhaust system for leaks in area of SCR catalytic converter (1). IMPORTANT Visual inspection only.  
TORQUE SPECIFICATION DIESEL PARTICULATE FILTER

Number Designation Model 907 with engine 642, 651
BA49.20-N-1003-02TSR Clamp, diesel particulate filter to SCR catalytic converter Nm 35