I battle to remove a hard stuck crank arm with damaged threads. I managed to get it off. If it hadn’t come off when it did, my next step was to heat up the crank arm with a heat gun while the puller had it under pressure. The aluminum might have expanded slightly allowing it to break loose.
p.s. Pre-1982 Stronglight cranksets used a 23.35mm puller tool. But this was a later model that takes a common 22mm puller. The drive side came off off fine with the Park Tool puller.
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