Tom, Just the fact there is rust particles in the pump is all Ford requires for a dealership to deny a warranty claim. The fuel in the tank may be good fuel, the damage is a slow progression of the filter passing water that is normally found in diesel. Some fuel additives will cause the water to be in suspension, pass the filter, rather than being caught in it.
It is common knowledge the Ford filter system will pass water. The dealership's have a multi page tech bulletin they have to follow when water damage is suspected. Link provided for your reading pleasure.
http://www.thedieselstop.com/forums/...el-job-aid.pdf
The owner can piss and moan all they want. Ford does not care. Just spend some time on a Ford forum.
http://www.thedieselstop.com/forums/...issues-360113/
Jim
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2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's