Fuel Pump: Description and Operation

An electric fuel pump is located in a specially designed reservoir within the fuel tank. The reservoir ensures that fuel is available at the pump inlet during all operating conditions, particularly when little fuel remains in the tank. The fuel pump is energized by the ASD relay and operates whenever the relay is activated. Fuel is drawn into the pump through a `sock type' filter screen, and the pump contains an integral fuel inlet check valve to prevent drain back.