tap it
so-o-o-o-o. the hole in the shaft is goes all the way through so you can tap the pin into the shaft, remove the handle, and then tap the pin out the other side? I sure would had to drive that hardend pin into the shaft and then drill to drill it out then.
If I can drive the pin through the shaft I think I might try using a small C-clamp and smaller-diameter pin so I don't have to whack on the shaft and take a chance on having to replace the shaft.