One problem related to power steering fluid has been reported for the 2002 Ford F-350. The most recently reported issues are listed below.
Hard steering with wineing noise. I was not able to steer the truck. Lucky for me I was going slow at the time. I traced the leaking fluid to a fitting on the power steering hose. Looks like a insulated steel pipe coming from the tubo rests on this steering hose. Constant rubbing and movement of this pipe causes damage to the hose fitting. Hose was repaired, however less than six months later it happend again same problem. I recognized the simptoms and was able to pull off the road safely. I do have the second hose and will keep if needed for inspection.