They'll come off with the inside disc. Hang the transmission from the inside disc and use a soft drift or hammer to drive the shaft down. Make sure there's a wooden block or something under the transmission to catch it when it comes free. I can't take credit for this procedure- it was Larry W that showed me, but I've done it quite a few times and it works great. I used to cut the races off with a die grinder: also works, but it takes a lot longer and you go broke buying new bearings every time.
Stuck in the seventies- not in the swamp.
(6) Attex, a Hustler, a Super Swamp Fox, (2) Tricarts, (3) Tri-sports, a Sno-co trike, 3 Dunecycles, and a Starcraft! ...so far