The Operator's Manual for my 345Fx clearing saw says "The drive shaft must be greased every three months during full-time use Contact your dealer if you are uncertain about the procedure." Thanks a lot, Husqvarna!
I loosened the bolts nearest the engine and could not get, without forcing, the shaft housing loose. Next I removed the cutting head and could not remove the shaft from there (I did find a figure for another model showing a nut at the top of the shaft, if this is the same, that would be why I could not pull it out from below).
What is my next step? Am I doing something dumb, or do I just work harder to get the shaft housing away from the engine/gas tank?