When using the pitman arm puller, loosen the nut on the pitman shaft that holds the arm on, but DO NOT remove the nut. Leave it on the pitman shaft a few turns so when the pitman arm "pops" loose, it will be contained to the shaft, possibly causing some damage to the person pulling the pitman arm or to something near the truck, or even the truck itself.
No need to learn the hard way when you have someone telling you this who did learn the hard way!
