Could somebody give me some advice?
I've been trying to get my Dual 504 belt drive up to the proper rpm (runs too slowly on both 33 & 45) and the pitch control doesn't seem to do a thing.
So far I've changed the belt and applied lubricant (polytetrafluorethylene) to both the platter socket and the motor.
However, it is still too slow. I've noticed also that the engine makes a soft noise and heats up, but only when the belt and platter are connected to the engine.
So, should I use a different lubricant, or throw out the engine?