Fuel system 1. Fuel return pipe from pump injectors: to the fuel tank; return fuel the line must not be bent, damaged or clogged; 2. Fuel supply pipe to booster pumps: extending from the fuel. filter; 3. Hollow fuel return screw. pipeline; 4. Fuel temperature sender -G81-; 5. Bolt; 6/9. Bracket; 7. Fuel pressure control valve -N276-: installed on cylinder bank 1; do not reuse; 8. Bolt; 10. High pressure fuel line: between the injection pump and the fuel pump. ramp; 11. High pressure fuel line: between fuel. ramp for cylinder bank 1 and fuel. cylinder bank 2 ramp; before reuse "fuel high pressure lines" carry out a visual check of the seals for damage, e.g. cross grooves or corrosion; Always replace if damaged; a faulty high pressure line must be replaced; 12. High pressure fuel pump: with fuel metering valve -N290-; After replacing the fuel injection pump, it is necessary to carry out the first refueling (to avoid dry running); 13. Leakage fuel lines (Return fuel highway): do not disassemble the return fuel lines - they can only be replaced complete with a pressure reducing valve; After replacement, let the engine idle for 2 minutes to remove air from the fuel. system and then check the fuel return lines for leaks; 14. Bolt: injector cover to cylinder head cover; 5.5 Nm; 15. Injection module cover; 16. Clamp: disassembled injectors and clamps to be reassembled must be reinstalled in the cylinders exclusively in the same places; if the injector (injector) is replaced, then the clamp must also be updated; 17. Hex nut with collar of clamping bracket: 10 Nm; 18. Fuel bolt ramps (high pressure receiver) cylinder bank 2:22 Nm; 19. Fuel pressure sender -G247-: 30 Nm; installed on cylinder bank 2; 20. Sealing collar: replace; 21. High pressure fuel lines: for the second row of cylinders; 25 Nm; 22. Fuel rail (High pressure energy accumulator): for the second row of cylinders; 23. Seal rings: replace; 24. Hex nut with collar of clamping bracket: 10 Nm; 25. Nozzle (piezo injector): listed components and seals, or seal. cuffs, replace each time they are removed or installed: "copper washer", "injector socket seal", "injector return line seal"; the following parts and seals, as well as seal. Replace the rings every time the injector is replaced: "clamp", "copper washer", "seal injector socket ring", "seal injector return ring"; before reuse "high pressure injection line" carry out a visual check of the seals for damage, e.g. cross grooves, corrosion; Always replace if damaged; removed injectors, high-pressure injection lines and clamps that are reinstalled must be installed exclusively on the same cylinder; 26. Bolt: injector cover to cylinder head cover; 5.5 Nm; 27. Injection module cover; 28. Sealing collar: replace; 29. High pressure fuel lines: for cylinder bank 1; 30. Bolt: fuel. ramps (high pressure receiver) cylinder bank 1; 22 Nm; 31. Leakage fuel lines (Return fuel highway): do not disassemble the return fuel lines - they can only be replaced complete with a pressure reducing valve; After replacement, let the engine idle for 2 minutes to remove air from the fuel. system and then check the fuel return lines for leaks; 32. Reducing valve: in the drainage pipelines of rows 1 and 2 of cylinders; The function of the pressure reducing valve is to provide residual pressure in the return fuel. highways (volume of control) OK. 10 bar; this quantity is necessary for the operation of Piezo injectors; the pressure reducing valve must be replaced only together with the fuel return lines; After replacement, let the engine idle for 2 minutes to remove air from the fuel. systems; check pressure reducing valve
Fuel system 1. Fuel return pipe from pump injectors: to the fuel tank; return fuel the line must not be bent, damaged or clogged; 2. Fuel supply pipe to booster pumps: extending from the fuel. filter; 3. Hollow fuel return screw. pipeline; 4. Fuel temperature sender -G81-; 5. Bolt; 6/9. Bracket; 7. Fuel pressure control valve -N276-: installed on cylinder bank 1; do not reuse; 8. Bolt; 10. High pressure fuel line: between the injection pump and the fuel pump. ramp; 11. High pressure fuel line: between fuel. ramp for cylinder bank 1 and fuel. cylinder bank 2 ramp; before reuse "fuel high pressure lines" carry out a visual check of the seals for damage, e.g. cross grooves or corrosion; Always replace if damaged; a faulty high pressure line must be replaced; 12. High pressure fuel pump: with fuel metering valve -N290-; After replacing the fuel injection pump, it is necessary to carry out the first refueling (to avoid dry running); 13. Leakage fuel lines (Return fuel highway): do not disassemble the return fuel lines - they can only be replaced complete with a pressure reducing valve; After replacement, let the engine idle for 2 minutes to remove air from the fuel. system and then check the fuel return lines for leaks; 14. Bolt: injector cover to cylinder head cover; 5.5 Nm; 15. Injection module cover; 16. Clamp: disassembled injectors and clamps to be reassembled must be reinstalled in the cylinders exclusively in the same places; if the injector (injector) is replaced, then the clamp must also be updated; 17. Hex nut with collar of clamping bracket: 10 Nm; 18. Fuel bolt ramps (high pressure receiver) cylinder bank 2:22 Nm; 19. Fuel pressure sender -G247-: 30 Nm; installed on cylinder bank 2; 20. Sealing collar: replace; 21. High pressure fuel lines: for the second row of cylinders; 25 Nm; 22. Fuel rail (High pressure energy accumulator): for the second row of cylinders; 23. Seal rings: replace; 24. Hex nut with collar of clamping bracket: 10 Nm; 25. Nozzle (piezo injector): listed components and seals, or seal. cuffs, replace each time they are removed or installed: "copper washer", "injector socket seal", "injector return line seal"; the following parts and seals, as well as seal. Replace the rings every time the injector is replaced: "clamp", "copper washer", "seal injector socket ring", "seal injector return ring"; before reuse "high pressure injection line" carry out a visual check of the seals for damage, e.g. cross grooves, corrosion; Always replace if damaged; removed injectors, high-pressure injection lines and clamps that are reinstalled must be installed exclusively on the same cylinder; 26. Bolt: injector cover to cylinder head cover; 5.5 Nm; 27. Injection module cover; 28. Sealing collar: replace; 29. High pressure fuel lines: for cylinder bank 1; 30. Bolt: fuel. ramps (high pressure receiver) cylinder bank 1; 22 Nm; 31. Leakage fuel lines (Return fuel highway): do not disassemble the return fuel lines - they can only be replaced complete with a pressure reducing valve; After replacement, let the engine idle for 2 minutes to remove air from the fuel. system and then check the fuel return lines for leaks; 32. Reducing valve: in the drainage pipelines of rows 1 and 2 of cylinders; The function of the pressure reducing valve is to provide residual pressure in the return fuel. highways (volume of control) OK. 10 bar; this quantity is necessary for the operation of Piezo injectors; the pressure reducing valve must be replaced only together with the fuel return lines; After replacement, let the engine idle for 2 minutes to remove air from the fuel. systems; check pressure reducing valve
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