Details of installation of the pressure regulator valve on diesel models (М612/628)
1 - Fuel line (M612) /valve assembly (M628)
2 - Bolts (TORX)
Y74 - Fuel pressure regulator valve
1. On models with the M612 engine, remove the fuel line (see Section Removal and installation of the fuel distributive highway and nozzles), on models with an M628 engine, remove the valve block (see Section Removal and installation of valve assembly).
Note. It is most reasonable to replace the regulator valve assembly with the fuel line / valve block.
2. 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).
3. Installation is carried out in the reverse order - do not forget to replace the sealing elements.
4. Finally, start the engine and check the components of the power system for signs of leaks.