The shop did a "half-donkey" job of cleaning the pivot shaft. Heat the shaft where it goes through both sides of the manifold and tap it forward and aft to clear out the rest of the carbon fouling that's making it stick. No lube should be needed once all the contamination is cleared out- - - -exhaust gas heat will simply make any kind of lube coke up as soon as the engine is run again.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!