Regarding my power steering whereby the steering wheel would self turn itself to the right lock. As suggested, I removed the end plate of the PS control body and saw only broken seal retainer pieces and only 1/2 of a seal. Hex bolts on the cover told me that somebody had been here before. Once totally apart, washers were missing and assembly was incorrect. Case-IH was of little help as some parts are no longer available. Twenty miles more and $70 had a complete unit in hand. I removed the cover plate and all was OK, reinstallation was easy and all works great. Thanks for the help!