Hi Benjamin,
with "pulley" you mean the part that is exactly on top of the motor's spindle, right?
Have you already opend and lubed the motor?
Yes, the brass pulley that spins with the motor, though I guess "pulley" isn't the correct word in this case since it isn't a belt-drive turntable! And I did already remove the bottom bracket on the motor to add a little lube to the end of the spindle and the bearing it touches. It's working fine now, but I wouldn't be surprised if it stopped again.
Best,
Matt