I'm tearing down a run out Berk pump. The bearing sounds like its filled with gravel when I spin the shaft. I can't seem to get the H bar/U joint assembly off the shaft. With the condition of the bearing, I'm wondering if the prior owner ran this thing just short of seizing up and the H bar is "hammered" onto the splined part of the shaft. If it comes down to saving one or the other, I'm much more interested in saving the H bar as opposed to the shaft. Any suggestions?