My 1949 IH Farmall tractor has those kind of seal fixing sleeves available for the same purpose. I put one on about 15 years ago... I thought it was very nice engineering to think of that for future rebuilds. Sure beats trying to grind or sand ... and when something has gouged it that is impossible... just take down low enough on injury to get the sleeve on.. red loctite it on .. go about the rest of the job.