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

i am using an extra one of those large washers and a 1 1/8 socket that has the end cut off so it sits down over the shaft. the remove method red fish said is whats happening.....its blowing the seal right out of the housing.....when installing the seal i seat it all the way down against the ridge above the bearing........this location in the housing makes it sit about 1/8 below the snap ring......it blows the seal up against the snap ring and loosens it and makes it leak....the only other option i know of is to try to seat it about where the snap ring is.....with the washer installed of course. i did use lock tight on it.....still blew out. could there be another problem? no slop in the output shaft and just using regular power fluid