[AT] PTO shaft question

[Mike]

I bought a used Worksaver post hole digger at an auction the other day, 
after a closer examination of the unit, it was clear the u-joints in the 
PTO shaft are shot, the needle bearings are gone, and the ends are just 
rattling around in the caps. It has a shear bolt that is used between 
the shaft and the gearbox, but it also has a roll pin that is in a blind 
hole pinning the shaft to the gearbox. The only way I can figure out how 
to remove it would be to drill out the pin. Any thoughts? Also, from 
anyone's past experience, it is cheaper to just replace the PTO shaft or 
to have new u-joints pressed in. I have no idea what size they are. 
Thanks for any input.

Mike M