Windshield wipers, how do you remove the arm? After removing the 13mm nut on the wiper shaft, It does not want to just lift off. I don't see any splines so I'm thinking its a taper press fit. Do I need to use a small gear puller? Thanks

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Stable:
1973 450sl
1978 red diamond ice vette
1975 steel blue convertable vette
2002 steel blue dakota quad.