I used an air hammer. It's a good one from Snap-on. Don't know if a HFT one would work as well but I use the air hammer to drive out all kinds of things. Didn't work on those king pins though. My ears are still ringing from using the BFH!

Here are some highly technical photographs:
http://picasaweb.google.com/orchidskip/DonTForceIt?authkey=0YGzJdcyZPQ