Kroil (www.kanolabs.com) and a Propane torch work very well as an "un-bonding" agent. Don't be afraid to use a little carefully-applied heat to get some of these old parts moving.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!