Hello i have an 76 model A & S made variable speed Bridgeport mill. My 6f Power feed is only working if i turn the speed knob up high. I tried to change the pot, but that did not change anything. Opening up the powerfeed, the internals look brand new. But the motor is full of black deposit, it looks like oil has come into the motor. What is the best metod of cleaning this out?
Regards
Frode Næstad