HIGH-PRESSURE FUEL PUMP REGULATOR VALVE ASSEMBLY CONTROL VALVE BODY CONTROL- VALVE SPRING Fig. 22 Low-pressure fuel is received at the control-valve fuel inlet port. The control valve plunger is spring actuated in the full fuel position when 24-volt power supply is not present at the solenoid. Depending on the supply voltage received, the solenoid armature acts against the control valve plunger and spring to move to the desired fuel inlet flow rate past the control valve determined by DDEC. CONTROL-VALVE FUEL INLET PORT CONTROL- VALVE 24-VOLT POWER SUPPLY CONNECTOR CONTROL- VALVE BODY SOLENOID ASSEMBLY Fig.
23 The regulator valve assembly is made up of the solenoid assembly and the control- valve body assembly, which includes the control valve plunger and control valve spring. Only the solenoid assembly is serviced separately from the complete regulator valve assembly. Page 23 CONTROL- VALVE SPRING CONTROL- VALVE SOLENOID