D14.40-0066-08
Shown on vehicle from vehicle identification end no. 126251 |
1 | Metering device | 7 | Electrical connector | B128 | SCR compressed air pressure sensor | ||
2 | Screw | 8 | Electrical connector | B129 | SCR AdBlue pressure sensor | ||
3 | Electrical connector | 9 | Electrical connector (from vehicle identification end no. 126251 or for retrofitted electrical wiring harness for the heating element (R28)) | B130 | SCR AdBlue temperature sensor | ||
4 | Injection line | 10 | Compressed-air line | Y109 | SCR AdBlue metering valve | ||
5 | AdBlue line | 11 | Connection fitting | R28 | Heating element (from vehicle identification end no. 126251 or for already-replaced metering device (1)) | ||
6 | Electrical connector | 12 | Connection fitting |
| Remove/install | ||
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. | |
Notes on use, material properties and handling of AdBlue® | |||
1 | Remove the maintenance hood. | Installation: Only install the maintenance hood once you have performed a leak test. | |
2 | Unscrew the injection line (4) on the metering device (1). | Seal openings with suitable stop plug. | |
Union nut, injection line to metering device | |||
3 | Disconnect electrical connectors (3, 6, 7, 8) | ||
4 | Disconnect electrical connection (9) | As of vehicle identification end no. 126251 or for retrofitted electrical wiring harness for the heating element (R28). | |
5 | Remove the AdBlue line (5) from the connection fitting (11) for the metering device (1). | Installation: Prior to assembly, check the AdBlue line (5) for foreign objects and dirt and, if necessary, clean. | |
6 | Unscrew the screws (2) and place the metering device (1) on the engine. | Installation: Check the bearing bushings on the metering device (1) and, if necessary, replace. | |
Metering device on bracket | |||
7 | Remove the compressed-air line (10) from the metering device (1) and remove the metering device (1). | Seal bores with suitable stop plugs. | |
Installation: Prior to assembly, check the compressed-air line (10) for foreign objects, dirt and damage; if necessary, clean/replace. | |||
Banjo bolt, compressed air line to metering device | |||
8 | Remove the connection fitting (11, 12), SCR air pressure sensor (B128), SCR AdBlue pressure sensor (B129), SCR AdBlue temperature sensor (B130) and SCR AdBlue metering valve (Y109) from the metering device (1). | Only when the metering device is replaced (1). | |
SCR AdBlue pressure sensor to metering device | |||
SCR AdBlue temperature sensor to metering device | |||
SCR air pressure sensor on metering device | |||
Pipe connection for AdBlue inlet to metering device | |||
9 | Install in the reverse order | ||
10 | Install the electrical wiring harness for the heating element (R28) for the metering device (1). | ||
Only for replacement of the metering device (1) for vehicle identification end no. up to 126250 and not retrofitted electrical wiring harness. | |||
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. | |
11 | Perform an engine test run and test the connections in the area of the metering device (1) for leaks. |
Referenced documents
- ah1440n000101a Notes on use, material properties and handling of AdBlue®
- ar1440d2036ad Install wiring harness for the heating element of metering device
- 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