Fuel Pressure Regulator: Service and Repair

REMOVAL

CAUTION: Cleanliness cannot be overemphasized when handling or replacing diesel fuel system components. This especially includes the fuel injectors, high-pressure fuel lines and fuel injection pump. Very tight tolerances are used with these parts. Dirt contamination could cause rapid part wear and possible plugging of fuel injector nozzle tip holes. This in turn could lead to possible engine misfire. Always wash/clean any fuel system component thoroughly before disassembly and then air dry. Cap or cover any open part after disassembly. Before assembly, examine each part for dirt, grease or other contaminants and clean if necessary. When installing new parts, lubricate them with clean engine oil or clean diesel fuel only.




The fuel pressure limiting valve (3) is located on the top of the fuel rail.

1. Thoroughly clean area at pressure limiting valve.
2. Remove banjo bolt (2) at banjo fitting.
3. Remove pressure limiting valve from fuel rail.

INSTALLATION
1. Be sure both top of manifold and limiting valve are clean.
2. Install valve. Refer to Torque Specifications.
3. Assemble banjo bolt and new sealing washers to limiting valve.
4. Tighten banjo bolt. Refer to Torque Specifications.