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How to Prime a Fuel Filter Water Seperator

Priming a diesel fuel system--including a water separator--removes air from your vehicles fuel lines. When air enters your fuel lines, the fuel system becomes air bound and fuel will not travel from the fuel tank to the fuel delivery system of your vehicle. After cleaning or installing a new water separator, you will need to remove the air from the system to allow your vehicle to perform correctly.

Instructions

1

Turn the petcock located on the bottom of the fuel filter/water separator counterclockwise.

2

Crank the engine by inserting the key into the ignition. Allow the engine to crank for 30 seconds. Check the fuel filter/water separator for air. If no air remains, turn the petcock clockwise to close the air way. Close the petcock and continue if air remains in the fuel line after cranking the engine.

3

Locate the hand priming bulb in the vehicles engine compartment. Repeatedly press and release the priming bulb until you see air bubbles moving toward the air release valve.

4

Press in on the priming bulb. Turn the air release valve counterclockwise. Keep your hand on the valve handle until fuel flows from the valve. Close the valve quickly while maintaining pressure on the priming bulb.

5

Wipe spilled fuel from the engine compartment with a clean rag.