Dear Ralph ,
In this plant they don't have even drawing and manufacturer manuals. All the maintenance do with a rough tolerance and alignment..
Bearings are installed by punching and rough handling.All the things done on trial and error basis.
Well it is quite sad that they have no more pride in their workmanship and management has no desire to give the mechanics the proper tools to do a better job, and then they might as well accept the fact that this problem will probably never change for the better.
Surely they have something they could heat the bearing with? A bearing as small as this pumps bearings could be heated by laying it on the rake in the oven of a kitchen stove, with the use of careful handling so as not to burn one's self. I have done this at home on some home projects. Just my opinion so do not do it on my advice.
I am merely saying "where there is a will there is usually a way" and am in no way responsible for the results if one tries this.
Another concern or question of mine is, " how are the other machines in the plant surviving and these can not? I assume the same type installation procedure is performed on the others also, huh?"
A hammer is the worse tool in a mechanic's toolbox when it comes to proper maintenance of equipment. I have seen mechanics trying to drive parts on a pump, fan, etc. and can not do it, so the solution is a "bigger hammer". A hammer has it a purpose but it is not to drive a cold bearing on an interference fit application.
You seem to not have answered the question about the outer race being or showing, on the failed bearing, to be "loaded" full circle of the outer race, or did I miss it?
Just my opinion and I could be totally wrong