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It's done. Used the freezer and oven method dry no oil (only oil on the shaft), my temp gun even after over 1 hour, only showed the sprocket over 200 deg. f. First try I used a 1 1/2" pipe to send it down (as the sprocket would not slide on without help) the key slid out and had to use the puller to get it back off, it was still hot and came off easy but did leave marks on the inner face of sprocket, not near the teeth. Next two tries worked for both sprockets but I did have to use the pipe and hammer to drive it home. The oven did turn them a bit blue anyway.
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