Originally Posted by miriam

I just had to do that on 2 machines and my 319 needs it. There is a set screw somewhere - I don't have a 301 but it is likely to the right in the body of the head. You can turn loose and then move the tension. I found helpful info here - nice to have expert help to refer to.... http://www.tfsr.org/publications/tec...achine_manual/ then look at tension mechanism. There are only a few ways those can go... You may have info in your user's manual... http://www.ismacs.net/singer_sewing_...ine-manual.pdf but it is only the owners manual...