I would get some Triflow oil. It broke loose a 15 clone that was frozen up. We just put a drop on any place that remotely might move. I kept trying to turn the hand wheel while DIL dropped the oil. It didn't take long. If you push the needle bar into the machine by hand you will see a place it goes in the machine - it may be a bit gummed up with dried on oil. Shoot it with some Triflow. I was kind of skeptical about it before I got some. Worth every penny.