Front tire cupping

[wg4t50]

I must admit, I get a kick out of reading these fixes.
40 years ago, I went to the Bear Front end school in Rock Island Ill. You never say bend the axle, you say you corrected it.
Anyway, have corrected a few, not an every day event, glad too as the equipment for a heavy axle front or rear is heavy.
Like has been suggested, many things can cause cupping, air pressure, balance, king pins, poor shocks andor loose wheel bearings to name the usual.  The thing about king pins, they are either like new and tight or loose, if loose, they are considered junk, meaning if you detectmuch slop in the pins, replace them,  They are easy on the 4104 & MCI 7, in fact the easiest I have ever changed.
On my MCI7, I also rebuilt / replaced all tie rod ends, drag link ends, and changed out the old power steering for the Shepperd, what a nice improvement, tire wear was only on the drive tires.