If you look down at the steering box, you will see a "screw" with a slot on the top and a jam nut. The basic process is to loosen the jam nut, tighten the screw all the way, then back out the screw a specified amount and lock down with the jam nut. I don't truct memory for specifics, like how much to back the screw out. I always consult the shop manual.
HTH good luck.