The shaft is welded to the worm. If you take the four bolts out the mast jacket will slid off
the shaft. Here are some random pictures of the rebuild of a 1950 unit which is the same
as yours:
http://www.pbase.com/dennygraham/steering&page=all I thought there was an online overhaul manual for the truck steering gear but I can't find it
now. They are available from any one of the vendors for a couple of bucks and they could
have it to you before Christmas probably.
DG
