Like many Oliver owners, and forum lurkers - I repack my own wheel bearings, grease the chassis, and anything else that needs doing. Recently I did my wheel bearings, Dexter has a decent video on the topic if your so inclined, and I ended up replacing both sets on the left side of my Oliver. Once I clean them really well - I do a close inspection to ensure they are good to go back on. I found some indication of damage - these are the bigger inside bearings.
If you look opposite the black dot- between the black lines you can see what I'm referring to. You cant see it, but where the indention is on the top side between the rollers is a polished spot, indicating it rubbed on the bearing race. I'm not sure if they were manufactured this way, or if damaged during assembly.
I put new Timken's in their place.
So perhaps some of the failings we have read about may have come about from this sort of longer term wear. These had 13K miles on them, the bearing cups/races looked fine.
Hope this is of interest to ya'll.
RB