If you are breaking bearing holder it is likely from pressure on end cylinder, I'm guessing that bearing is still OK. Discharge beater not pulling material away, cylinder bars not extended to discharge, ect. What sort of crop would you be harvesting at what cylinder RPM and how much rubbleing. I have seen stop sign loosen up, bearing holder loosen up, and bearing holder break but that was when machine was about to explode from what was being shuved threw it.