I don't have any machines with potted motors, but if the motor and bearings are dependant on the wicking action on the oil I guess you should. How is the state of the wicks? If they are dried up and grimey, you might clean them out somehow, but less work replacing them. However, once the parts are greased they should last a good while even with out the wick.
I don't know how much grease that ever actually wicks, or if it acts more as a reservoir for oil; when the motor gets warm a slight amount of oil will seep from it. There are a few threads on this wicking problem. The black belt driven motors I have opened have had wicks, the newer beige ones (a guess would be late fifities and up) don't seem to have any.
Last edited by Mickey2; 11-03-2016 at 06:38 AM.