Attention! Do not smoke or use open flames in areas where work is being done on the fuel system. When working on the fuel system, disconnect the negative battery cable, except for tests that require battery voltage.
Removal procedure
1. Remove the injector return hose.
Important: Do not tighten the clamp, but only press it and at the same time disconnect the nozzle return hose. If you remove the clamp from the nozzle, then it will not be possible to reuse it.
2. Disconnect injection pump return hose.
3. Disconnect the common rail return hose.
4. Remove the fixing bolts of the connecting block.
5. Remove the fuel return line assembly.
Installation procedure
1. Install the fuel return line assembly.
2. Connect the common rail return hose.
Important: Push the nozzle return tube vertically downwards into the nozzle with your hand until you hear a click of the connecting piece that is in place.
3. Connect injection pump return hose.
4. Install the connection block.
Tighten
Tighten the connecting block mounting bolts to 11 Nm (97.4 lb-in).