For you Rudi:
First, the shaft: Note, the shaft should be the same diameter from the left side to the shoulder.
Next, the two gear assemblies-one good-one pitted.
Removal: I used an old 3/8" deep well socket as a press collar, put some tension on the press and added heat and it popped loose.
Installation involved use of a 1/2" deep well socket as a press collar so it would fit on the shoulder of the shaft.
I didn't go into more disassembly as there is already a good powerpoint presentation on governor overhaul.
There may be some trial and error to get the proper depth of the shaft in the gear so the shaft will turn properly and not bind.