I've got first hand experience removing a sharktoothed sprocket frozen onto the driver. After soaking for a couple days with liquid wrench and Kroil, heating with a propane torch a bit, I became inpatient and began tapping gently on the teeth in the direction it should go using a block of wood and a rubber mallet. Graduated to a wooden mallet. Eventually there was a crisp 'TING' and one of the teeth snapped off. That took the wind out of my sails and I berated myself for not being more patient. Reached over to adjust the driver in the vise and the sprocket was so loose I spun it off with a finger. The sacrificed tooth must have appeased the seized thread gods...
Here's my favorite view I found on someone else's overhaul page.
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And here is a nice overhaul description on the ratrodbikes site.
http://ratrodbikes.com/forum/index.php?threads/u-c-b-hub-project-new-departure-model-a.48972/.
Mine after disassembly and cleaning.
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Good luck,
Gary