Fresh Startup Procedure.

in the past i never had an issue with that.. just use a screw driver to turn it and it should lift out.. may need long needle nose or two screw drivers to get it all the way out....

my trucks seems to be stuck though.. maybe grime build up from being in there over 50 years..
I'll guess varnish layered like crazy below the bushing...

With a new bushing and cam, the gear may be quite tight. Needle nosed pliers or surgical clamps may help pull it up.