Garage saling today just because. Found a free Dressmaker with a handwheel that turns but the needle doesn't move. Asked if he'd oiled the machine and he said it sat in the garage for about 5 yrs. Any ideas on to unfreeze the needle and get her working again? Will post pics later today after the yard work and garden work. It's a potted motor. You can see the belt on the handwheel but it's covered other than that along with the motor. Thx in advance.