Originally Posted by caotropheus
Yes, like removing the washer after you remove the bolt that locks the cranks in place. Only after removing the washer, you can use the crank puller with success
This is an easy thing to miss, and as noted, you can tighten the puller 'till the cows come home and not remove the arm if the washer is still in place. You do stand a good chance of removing the threads from the crank arm if you are too persistant.