A friend of mine over the weekend removed the left side wheel on his '18 Touring without any problems. It has the early ball bearings. The right side however would not come off. All the outer bearings and parts came off without any issues. The wheel is loose but will not budge. I found this thread to be useful for understanding the cross sectional parts: http://www.mtfca.com/discus/messages/257047/301135.html but for the life of me still can't understand what is holding it back. Any suggestions for removing the wheel without messing up the wood wheels would be appreciated.
For starters I would dig the seal out, it may require a bit (a lot?) of surgery to get it out. Then at least you could get a bit of a looksee at the bearing.
Guessing also but I suspect the inner bearing race is frozen on the spindle shaft. I'm not 100% sure that the seal will pass over the race but I don't think it will. Your seal it toast any way so Ken's suggestion is a good one. Once the seal is gone the wheel should come off. If the bearing is actually stuck it's probably shot too. Slight heating will cause it to loosen. DO NOT try to chisel it off without face protection as it's hard and will shatter causing sharp bits to fly every where.
Unless it is an oddity, there should be no reason for the seal to keep the wheel on (beyond a minor hangup). It should just slip right off. That said, if it doesn't want to come off, remove the seal as Ken T and Charlie B said. Getting the bearing cone off the spindle may be the most difficult part. I have had a few I couldn't remove without an angle grinder (being VERY careful to not cut too deep).
Drive carefully, and enjoy, W2