Thread title says it all. I doubt the bearing is lifetime lubricated, so just how do you go about it? JohnK

I have a Fatboy Gimbal on a Classic Signature and have been chasing hum/static issues. I think I've narrowed it down to the possibility that the tonearm has lost its ground continuity--assuming its supposed to have it. If it is supposed to have a ground, how do I check it? JohnK