If the grease cup, spring, and Bakelite washer are in place, and not gunked up, the pressure of the Bakelite disc against the rotating shaft will keep the shaft loaded against one wall of the bushing. That should minimize the tendency for the shaft and the breaker cam to wobble. Unfortunately, the grease in the cup has a habit of getting harder than woodpecker lips!
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!