Hello.. I have a CT-F650 that I in the process of restoring. I am having an issue with one of the belt pulleys. It's the wheel that goes on the follower plate. I am assuming it should rotate freely? Mine is pretty stiff and kind of locked up. I took it apart and there is a spring and a plastic spring retainer. I looked at the shaft portion that the insert goes in and it looks cracked. Wondering if this is supposed to be like this. I would imagine that being cracked, the piece that inserted into the end of that shaft is pushing that out and it is too tight in the hole to turn freely. Not sure what the spring and all that is for. The next question is going to be where in the heck do I get a replacement?