I've always used a non-adjustable pitman arm puller, tighten it down with an impact and hit the end that you just took the impact off of with a, yes, BFH a couple times. Retighten, whack whack, retighten, ...... You don't need to kill it with the hammer, just a few solid hit and then retighten. You hit it too hard, too many times and you'll break the top. Just good,solid hits.