2011 Ford F450 Super Duty Crew Cab Diesel Supplement 5th Printing - Page 38

Maintenance and Specifications Water should be drained from the module assembly whenever the warning light comes on and the message center directs you to drain the water separator. This will occur when approximately 0.32 pints (150 ml) of water accumulates in the module. If water level is allowed to exceed this level, the water may be passed through to the engine and may cause fuel injection equipment damage. Draining the DFCM 1. Stop the vehicle and shut off the engine. WARNING: The vehicle must be stopped with the engine off when draining the DFCM. Fuel may ignite if the separator is drained while the engine is running or vehicle is moving. Note: Air will enter into the fuel system if the DFCM is drained while the system is running. The engine will not operate properly if air enters the system. 2. Locate the DFCM and place an appropriate container under the drain port (see illustration). 3. Rotate the drain counterclockwise until the O-ring is visible. Allow the DFCM to drain for approximately 25 seconds or until clean fuel is observed. Rotate the drain clockwise to tighten it. 4. Make sure that the drain valve is fully tightened, then remove the container from under the vehicle. Note: A loose drain valve can allow air to enter the fuel system and cause drivetrain issues. The engine will not operate properly. be sure that the drain valve is fully tightened. 5. Restart the engine. The WATER IN FUEL DRAIN FILTER or WATER IN FUEL DRAIN FILTER SEE MANUAL message and light should not be illuminated. If they continues to illuminate, have the fuel system checked and repaired. 38 2011 Diesel (eco) Supplement, 5th Printing USA (fus)