One of the rear tires, a 11L-15SL 12 ply, on my John Deere 750 Drill was badly worn and needed to be replaced. I jacked up the back of the drill and took out the lug bolts, but unexpectedly it wouldn't come off. I'd hit the rim with a hammer/block of wood - nothing. Finally I warmed the rim up with a propane torch and I was able to knock it off. I'll take it to the tire shop and have them put a new tire on the rim.
I'm glad I took care of it now, where I have all my tools and I'm on smooth flat ground. Changing this tire on tilled ground out in the middle of the field would have a been a challenge.