Mitsubishi Fuso CANTER FE85DE6SLGP, Shop Manual

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3. Fuel Filter
• The fuel filter, which also serves as a water separator, removes impurities in the fuel through the filter element and
also separates water from fuel.
• The water that has been separated from the fuel collects at the bottom of the fuel filter. A water separator sensor
is installed in the fuel filter, which activates the warning lamp on the meter cluster when the water reaches a cer-
tain level.
• The water can be drained through the drain hole by loosening the water separator sensor.
• A priming pump is provided at the fuel filter head. The priming pump is used for air-bleeding the fuel system.
• When the fuel temperature rises, the thermostat swells and the valve of the fuel filter head is closed. The high-
temperature fuel entirely returns to the fuel tank through the fuel return pipe.
• When the fuel temperature lowers, the thermostat does not swell and the valve to the fuel filter remains open. The
high-temperature fuel returning through the fuel return pipe is let through the valve to mix into the fuel around the
element. The fuel around the element is warmed as a result and wax in it (precipitated when the fuel temperature
is low) is dissolved to prevent clogging of the element.