power steering pump seal blowing out....5 times now

check the seating area on the output shaft very closely to make sure there are no scratches or were marks that would damage the seal. I don't believe the pump has anything to do with it. its just a pump and their isn't that much difference in output pressure between them. are you useing the correct fluid. is their any slop in the output shaft. a bad bearing will cause seal problems.dose the pump make any unusual noise dose the power steering work properly.make shure there is no oil on the outer seal seating area and use locktite with activator to install the next one so as to help hold it in. if it isn't tite in the hole.