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Originally Posted by Rob Pruijt
I would try to heat it up, if its sufficiently warm it may expand enough to slide off.
One of the methods is to use a electric welder and just weld in a circle on the wheel. Don’t touch the aluminium with the welder, it will just burn away.
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I agree, I would fit the Gas-Wrench (a 2-gas that is) with a fine tip so I could direct the majority of heat to the gear itself. I would heat the circumference of the gear approx 1/2" from the crank snout and then try a little prying. You may need to heat the gear a couple of different times in order to get it to release. If it is really stubborn after heating it up a couple of different times, I think I would use an air hammer to see if I could get it to break the static resistance between the 2 pieces. The air hammer must be used with thoughtfulness because you want to avoid cremating the gear as that could lead to more unwanted tension on the crankshaft. Subtle, controlled hammering with a pin bit traveling the circumference of the gear would finish releasing the stubborn little sh*%
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