Andrew
That old bearing had loads of life left
Wrap some binder string round the shaft that should fix it up for at least another season

Or repackage with a grease we used at the iron works for exposed gears called Marfac boy was it thick and had stringy bits it it and you nigh on could not get it off your hands
At my uncle farm the reaper was held together with binder twine , I have fond memories of the pink thrashing drum arriving and the flat belts flapping about ,no HS them days
The one thing I want to forget was a very bad tempered Jersy bull , before AI was used he was nasty we had to tie his ring to the TVO fueled Fordson
Stuart