I have a painted plaster, kidney shaped 26,000 gallon +/-in ground pool with a pentair challenger 3/4 hp 1.27 sf centurion for pas fab pump. The motor had a bad bearing so I replaced motor with a two speed 1 hp motor. I replaced the seals and reassembled the pump. There is a tiny leak, which looks like its coming from the seal area. I had a difficult time getting the rubber part of the seal seated properly.. I do some pool maintenance , weekly maintenance, water testing but do not work on pumps as a general rule. I must say that large metal band is a pain . I read on line checked out videos about "do not touch" ceramic part of seal.. whats up with that ??
Anyway, Do I need to tear the pump back apart and purchase new seals..