Crank sprocket won't budge

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htown16

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Disassembling a bike that has sat with it's primary cover off for a long time. Got my puller on the crank sprocket and it won't pop. Tried my MAP torch on it for a good long time. No go. Any ideas?
 
Keep it up. Puller on, heat the sprocket to 300, tap the push screw with a hammer.
Repeat. Drink a beer. Do it again.
It’ll come.
 
If you can beg , borrow , rent , ( buy but very expensive) an induction heater that should do it . If you are not familiar with these they have various size cables you wrap around nuts , studs ,bearings etc. The beauty of these is they concentrate the heat on the part you are trying to expand whereas a torch heats both the pinion and the shaft.
 
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