Originally Posted by vintagemotif

Janice,
Go to the tfsr.org site for tension information. http://www.tfsr.org/publications/tec...achine_manual/

click on tension mechanism, and I believe it is around page 5/6 that will give you the information on tension.

If you have the instruction manual for a Singer 15-91 (which I do) there is an excellent illustration and information on disassembling and reassembling the thread tension. I doubt the tension dial on your 301 is way different from the 15's. Hope that can be of help to you!