Remove/install metering device for exhaust aftertreatment system · ar1440w2002c · Mercedes-Benz WIS

AR14.40-W-2002C

Remove/install metering device for exhaust aftertreatment system

22.3.11

ENGINES 900.9 in MODEL 375.1, 970, 972, 975, 976 with CODE (MS4) BlueTec 4

ENGINES 900.9 in MODEL 375.1, 970, 972, 975, 976 with CODE (MS5) BlueTec 5

ENGINES 902.9 in MODEL 375.3, 950.5 /6, 952.5 /6, 953.6, 954.5, 957 with CODE (MS4) BlueTec 4

ENGINES 902.9 in MODEL 375.3, 950.5 /6, 952.5 /6, 953.6, 954.5, 957 with CODE (MS5) BlueTec 5

ENGINES 902.9 in MODEL 375.1, 970, 972, 974, 975, 976 with CODE (MS4) BlueTec 4

ENGINES 902.9 in MODEL 375.1, 970, 972, 974, 975, 976 with CODE (MS5) BlueTec 5

ENGINES 924.9 in MODEL 958.0, 970, 972, 974, 975, 976 with CODE (MS4) BlueTec 4

ENGINES 924.9 in MODEL 958.0, 970, 972, 974, 975, 976 with CODE (MS5) BlueTec 5

ENGINES 925.9 in MODEL 970, 972, 974 with CODE (MS4) BlueTec 4

ENGINES 925.9 in MODEL 970, 972, 974 with CODE (MS5) BlueTec 5

ENGINES 926.9 in MODEL 950.5 /6, 952.5 /6, 953.6, 954.5, 957, 958.2 with CODE (MS4) BlueTec 4

ENGINES 926.9 in MODEL 950.5 /6, 952.5 /6, 953.6, 954.5, 957, 958.2 with CODE (MS5) BlueTec 5

ENGINES 926.9 in MODEL 958.0 with CODE (MS4) BlueTec 4

ENGINES 926.9 in MODEL 958.0 with CODE (MS5) BlueTec 5

Remove/install metering device for exhaust aftertreatment system

W14.40-1234-08

Shown on model 950.5

1 Line fitting (AdBlue inlet)

2 AdBlue inlet

3 Compressed air inlet

4 Decoupling bushes

5 AdBlue/air mixture outlet

6 Line fitting (AdBlue/air mixture outlet)

B128 SCR compressed air pressure sensor

B129 SCR AdBlue pressure sensor

B130 SCR AdBlue temperature sensor

Y109 SCR AdBlue metering valve

7 Metering device

8 Compressed-air line

9 Compressed air connector

10 AdBlue feed hose

W14.40-1425-12

7 Metering device

11 Electrical cable set

Arrow Grommets

 	Remove/install
 Danger!	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
	Notes on use, material properties and handling of AdBlue®		AH14.40-N-0001-01A
1	Remove injection line	 Installation: Replace injection line after each removal.	AR14.40-W-2001C
2	Switch off ignition
3	Disconnect electrical connectors at metering device (7)	 During installation ensure that electrical cable set (11) is fixed with cable ties so that the rubber grommets (arrows) of the electrical connectors on the metering device (7) are bent at an angle of more 90°; otherwise, there can be damage due to the entering of water.
4	Detach compressed air line (8) at metering device (7)	 Seal holes with a suitable plug.
		 Installation: Check compressed air connector (9) of compressed air line (8) for foreign objects, contamination and damage before assembly.
			*BA00.18-N-1003-01A
5	Remove AdBlue feed hose on line fitting (1) and push to the side	 Installation: Check AdBlue feed hose for foreign objects, contamination and damage before assembling.
6	Remove line fitting (1) on metering device (7)	 Only when metering device (7) is to be replaced.
			*BA14.40-N-1034-02C
7	Remove metering device (7) with decoupling jack (4)	 Installation: Check metering device (7) for foreign objects, contamination and damage before assembling. Check decoupling jack (4), replace if necessary.
			*BA14.40-N-1005-02C
8	Install in the reverse order
Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Start engine
10	Run engine and inspect metering device (7) for leaks

 Compressed air lines

Number	Designation			Model 375.1	Model 375.3, 375.4


BA00.18-N-1003-01A	Compressed air connection system SCHÄFER "SDF" in metallic material	M101	Nm	5	5

 Compressed air lines

Number	Designation			Models 930, 932, 933, 934, 950, 952, 953, 954, 957, 958	Model 970, 972, 974, 975, 976


BA00.18-N-1003-01A	Compressed air connection system SCHÄFER "SDF" in metallic material	M101	Nm	5	5

 Exhaust aftertreatment, Blue Tec

Number	Designation		Engine 900.9, 902.9, 924.9, 925.9, 926.9 with code MS4 or code MS5


BA14.40-N-1005-02C	Metering device on bracket	Nm	25
BA14.40-N-1034-02C	Pipe connection for AdBlue input to metering device	Nm	22

Referenced documents

ah1440n000101a Notes on use, material properties and handling of AdBlue®
ar1440w2001c Remove/install injection line for exhaust aftertreatment system
as0000z000501a 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.
as1440z000101a 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