Well, I have removed the potted motor and handwheel. The grease is still in good shape, it isn't hardened at all. I'm stumped as to what could be keeping the parts from moving. As I said, the parts jiggle in place. The machine was not used much. The original owner was a housekeeper and used the machine lightly and then 30 yrs ago it was bought at an estate sale by someone who just wanted to use it as a side table. She wasn't a sewer and it sat unused and unloved for 30 years. I'm stumped at this point.