1 - Fuel line (163.113) /valve assembly (163.128)
2 - Bolts (TORX)
Y74 - Fuel pressure regulator valve
1. Installation details of the fuel pressure regulator valve on diesel models are shown in the illustration, to which all references in the text refer.
2. On models 163.113 (612 series engine) remove the fuel line (see Section Removal and installation of the fuel distributive highway and nozzles), on models 163.128 (628 series engine) remove valve block (see Section Removal and installation of valve assembly on models 163.128).
Note. It is most reasonable to replace the regulator valve assembly with the fuel line / valve block.
3. If necessary, pressure control valve (Y74) can be removed from the line / valve assembly clamped in a vise with soft jaws by unscrewing the fixing bolts (2).
4. Installation is carried out in the reverse order. Don't forget to replace the sealing elements.
5. Finally, start the engine and check the components of the power system for signs of leaks.