UENR0623-02 27 Engine Operation Fuel pressure sensor Secondary Fuel Filter Fuel temperature sensor Water in fuel sensor The following list contains examples of both service and repairs when you must prime the system: A fuel filter is changed. A low-pressure fuel line is replaced. The fuel injection pump is replaced. For the correct procedure to prime the fuel system, refer to Systems Operation, Testing and Adjusting, “Fuel System - Prime”. Primary Filter/Water Separator Illustration 21 g02848803 Typical example The secondary fuel filter (1) is located after the fuel transfer pump. The secondary fuel filter (1) provides a 4 micron filtration level.
The fuel temperature sensor measures the temperature of the fuel. The ECM receives the signal from the fuel temperature sensor. The ECM calculates the volume of fuel. Fuel Pump Assembly Illustration 20 g02848802 Typical example The primary filter/water separator (1) is located between the fuel tank and the fuel transfer pump. The primary filter/water separator (1) provides a 10 micron filtration level. The primary filter/water separator can either be engine mounted or supplied loose. The primary filter/ water separator is supplied with water in fuel sensor. The water in fuel sensor has to be connected. Illustration 22 g02493877 Typical example