November 15th, 2012.
Congratulations on the lower king pin! They get body bound with rust, and back when I had to do my M422A1 in the late 1970's, the only way to get it out was to hacksaw it off and the heat and drive the remains out.
At that time there were no new kingpins to be had on the civillian market, so I had to machine out two new kingpins (one for each side) and a new lengthened hub center bolt (no new ones of these either) to get the cotter pin holes out far enough to get a second lock nut on the bolt. Why a second lock nut, you ask?
Because the original hub bolts fracture through the cotter pin holes, then the nut backs off and so does your hub and wheels!
If Mr. Miller still has my M422A1 2043, he should have a spare kingpin and possible an extra hub bolt that I had with it when I sold it to him, plus he may have the original machinist drawings done by my dad stuck in one of his TM's. Should he wish to sell 2043, he might want to let me know as I may have a buyer for him.
The wheel bearings are common Timkens, locate them at Bearings Incorporated, along with the Chicago Rawhide hub seals....