OK, in my efforts to get off the old clutch if found it was easy to pull off the pully and clutch bell or drum assembly but this left the spring loaded clutch shoe assembly on the shaft.
I could not get a wheel puller to fit between the shoes and the cowling bolted to the side of the Kohler engine.
Since the clutch friction material is a solid casting, that is, not a material glued or riveted to a steel base, the spring loaded clutch assembly is a throw away part. It is not rebuildable.
So i used an angle grinder to grind off the rivets and pulled the shoes off the assembly. This made room for the wheel puller claws to get behind the remaining clutch assembly and remove it.
When the clutch assembly was off i found that the assembly is a sliding fit on the engine shaft, easily pulled off by finger pressure. The binding frictiion is entirely in the key way and key. The key is driven into the keyway to hold the clutch assembly on the engine shaft. Next time i will use a vice grip to pull this key out of the key way and get the clutch assembly off the shaft.
So the dissembly process is
Pull off the pully housing by hand
Use vice grips to pull out the key from the key way.
Slide off the clutch assembly by hand
Hope that helps you.