Luxman T-310U Tuning dial service.

Has anyone worked on a Luxman T-310U tuner? My tuning dial (rotary knob) chatters when turned. Think it needs some lubrivcant but don't want to use the wrong type...any suggestions? Also a few of the indicating bulbs are out...the blue fm indicator in the dial pointer and the fm indicator lamp. Believe the faceplate must come off??? Source for replacement bulbs? Any help would be appreciated.