And going to the dealer and seeing what those cups look like to see if you need to replace yours.
From what I can see you are talking about the thin metal cups that are grease cuts to keep dirt out of the bearings. We used to have to replace them normally every couple of hundred hours when we ran a 326. I have had something fly up from one of the other blades striking it and bend one of the cups so that it rubbed when it turned. In a pinch when this happened I have taken it off in the field and taken a hammer and set it on the trailer ball of the truck and straightened it enough to run till we had time to get another one.