Singer 328 seemed to lock up
I finished a quilt then cleaned/oiled my 50 year old Singer 328. I removed a LOT of fuzz and lint. It was working fine and now it appears to be locked up, for the lack of a better term. I've had the bobbin case in and out several times. I'm sure its in properly, with the fingers in the right place and the lock in place. Needle goes up and down somewhat, then locks. Fly wheel won't turn freely. It must be something I've not replaced correctly. Any suggestions ?