Fuel system (CAMA, CAMB, CCWA, CCWB, CGKA, CGKB)
1. Reverse fuel. main line: to the fuel tank; reverse fuel. the main line must not be kinked, damaged or clogged.
2. Fuel supply. main line: coming from fuel. filter.
3. Hollow screw of return fuel. pipeline.
4. Fuel temperature sensor "G81".
5. Bolt.
6. Holder.
7. Fuel pressure regulating valve "N276": installed on cylinder bank 1; do not reuse; after replacing the high-pressure pump or the fuel pressure regulating valve "N276", it is necessary to carry out re-adaptation.
8. Bolt.
9. Holder.
10. High pressure fuel line: between the high pressure pump and the fuel distributor.
11. High pressure fuel line: between fuel. ramps 1 and 2 of the cylinder rows; before reusing the "High Pressure Fuel Line", visually inspect the seals for damage, such as nicks or corrosion; if there is damage, use a new line; the faulty high pressure line must be replaced.
12. Fuel injection pump: with fuel metering valve "N290"; after replacing the fuel injection pump, it is necessary to carry out the first refueling (to prevent dry running); after replacing the high-pressure pump or the fuel pressure regulating valve "N276", it is necessary to carry out re-adaptation.
13. Return fuel. highways: return fuel. do not disassemble the lines - they can only be replaced together with the pressure reducing valve; after replacement, let the engine run for 2 minutes at idle. move to remove air from the fuel. system, then check the return fuel lines for leaks. highways.
14. Bolt: injector cover to cylinder head cover; 5.5 Nm.
15. System unit cover. injection.
16. Clamp: disassembled injectors and clamps to be assembled must be reinstalled in the cylinders exclusively in the same places; if the nozzle is replaced, the clamp must also be replaced.
17. Hexagonal flange nut of clamp bracket; 10 Nm.
18. Bolt: for fuel distributor, cylinder bank 2; 22 Nm.
19. Fuel pressure sensor "G247": 30 Nm; installed on cylinder bank 2.
20. Lip seal: replace.
21. High pressure fuel lines: for 2 cylinder bank; 25 Nm.
22. Fuel rail: for 2 rows of cylinders.
23. Sealing rings; replace.
24. Hexagonal flange nut of clamp bracket; 10 Nm.
25. Nozzle.
26. Bolt: injector cover to cylinder head cover; 5.5 Nm.
27. System block cover. injection.
28. Lip seal: replace.
29. High pressure pipes: for 1 row of cylinders.
30. Bolt: for fuel distributor, cylinder bank 1; 22 Nm.
31. Return fuel. highways: return fuel. do not disassemble the lines; they can only be replaced together with the pressure-reducing valve; after replacement, let the engine run for 2 minutes at idle. move to remove air from the fuel. system, then check the return fuel lines for leaks. highways.
32. Pressure reducing valve: in return fuel. lines 1 and 2 of cylinder rows; the task of the pressure reducing valve is to maintain residual pressure in the return fuel. the line pressure is always around 10 bar, which is necessary for the piezo injectors to operate normally; the pressure reducing valve should only be replaced as a set with the return fuel. highways; after replacement, it is necessary to let the engine run at idle. run for about 2 minutes to remove air from the fuel. syst.