Given these fans often begin to go brittle with time....you may want to replace the fan especially is you see any "hairline cracks" in the blades or at the hub
As was pointed out in a previous thread Haynes and Clymer mentioned using the axle....who knows how many were done that way by "maggot word O' mouth" in the earlier years....
Fit a new fan....and keep the M14 bolt for future use...eg you may need to replace seals/gaskets behind the fan in future.....
I had intended to warn against using a ball joint separator, or the like. Because it's a simple wedge, it can put a lateral force on the (very brittle) camshaft. the fan should come off straight, if at all possible.
Glad to hear it didn't bite you.
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