Caution! To prevent the high-pressure fuel pump from running dry and to ensure a quick engine start after replacing parts, follow these steps. When removing or replacing fuel parts/components. the first refueling of the crowds must be carried out between the fuel tank and the high-pressure fuel pump. system.. After removing or replacing the fuel. pump, fuel line (between the tank and the high-pressure fuel pump) or fuel filter, it is necessary to bleed the fuel before starting the engine for the first time. system.. After removing or replacing the fuel injection pump, it is necessary to bleed the fuel before starting the engine for the first time. system.. Failure to complete the first refueling will result in damage to the fuel system. pump.
1. Fuel injection pump: after replacement, the first fuel fill should be performed. syst. (be sure to avoid working with fuel. dry system).
2. Fuel metering valve "N290": do not open.
3. Mesh filter.
4. Fuel temperature sensor "G81".
5. Fuel pressure sensor "G247": 100 Nm.
6. Fuel rail.
7. Fuel pressure regulating valve "N276": 80 Nm; do not reuse.
8. Injectors.
9. Return fuel. highways: return fuel. do not disassemble the lines; they can only be replaced together with the pressure-reducing valve; after replacement, it is necessary to let the engine idle for about 2 minutes to remove air from the fuel. system, then check the tightness of the return fuel. highways.
10. Pressure reducing valve: The function of the pressure reducing valve is to maintain residual pressure in the return fuel. highways (control volume) approx. 10 bar, this is necessary for the injectors to operate normally; the pressure reducing valve should only be replaced as a set with the return fuel lines; after replacement, it is necessary to let the engine idle for about 2 minutes to remove air from the fuel. syst.
11. Fuel radiator: installed on the bottom.
12. Fuel tank: with fuel pump "G6".
13. Heating valve.
14. Additional fuel. pump "V393".
15. Fuel filter.