Wiper motor removal

Can i get the group's advice on removing the windshield wiper motor from a 348. My real task is to change the clutch master cylinder, but it is under the wiper motor so I'm trying to get the motor out of the way.

I successfully loosened the three bolts holding the motor to the bracket and I was able to remove the nut from the shaft (see photo), but then the linkage will not come loose from the shaft. I was expecting that to be some sort of keyed fit that would just slip up off the shaft.

Am I correct about the procedure and the linkage is just stuck on the shaft or do I have the procedure wrong?
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Thanks, tbakowsky, a shot of WD-40 and a screwdriver did the trick. That's my problem with car repairs... I never know when to use finesse and when to use force.

P.S. The clutch master cylinder came off relatively easily once the wiper motor was out of the way.