Section 10-01B: Fuel Tank, Filters, Tubes and Fuel Pump, Diesel Engine | 1996 F-Series and F-Super Duty Vehicles Equipped with Diesel Engines Workshop Manual |
WARNING: FUEL TANK FILLER CAP (9030) MAY BE PRESSURIZED. TO REMOVE, ROTATE CAP OVER 1/2 TURN COUNTERCLOCKWISE. IF CAP IS VENTING FUEL OR A HISSING SOUND IS HEARD, WAIT UNTIL THE CONDITION STOPS BEFORE REMOVING THE CAP. IF THESE PRECAUTIONS ARE NOT FOLLOWED, FUEL MAY SPRAY AND CAUSE PERSONAL INJURY.
The fuel tank filler cap is of a threaded screw-on design with a pre-vent feature that allows the fuel tank (9002) to vent for the first three-quarter turn before unthreading. All fuel tank filler caps are attached to the vehicle with a tether using the filler pipe-to-housing screw at the three to four o'clock position. The fuel tank filler cap assembly provides pressure and vacuum relief functions, and should be replaced with the proper pressure/vacuum relief cap to prevent possible system malfunction.
WARNING: DO NOT SMOKE, CARRY LIGHTED TOBACCO OR AN OPEN FLAME OF ANY TYPE WHEN WORKING ON OR NEAR ANY FUEL-RELATED COMPONENT. HIGHLY FLAMMABLE MIXTURES ARE ALWAYS PRESENT AND MAY BE IGNITED, RESULTING IN POSSIBLE PERSONAL INJURY.