Fuel Injection System
The fuel injection system consists of a mechanical fuel injection pump, high pressure injection lines and injection nozzles. Fuel is drawn up from the fuel tank through the fuel filter by a feed pump incorporated in the injection pump and flows into the injection pump housing.
A regulating valve is incorporated in the injection pump housing to control fuel pressure from the feed pump.
A part of the fuel is sent to the injection nozzle, and the remainder is returned to the fuel tank and the injection pump fuel inlet through the injection timing control solenoid valve. This circulation of fuel serves to cool and lubricate the pump, and to control the injection timing.