I wish I could tell you exactly how the belts are replaced on a Kenmore 158.1941.I had the same Kenmore model,I never had to replace a belt on that model.I still have 3 boxes with Kenmore 158.1941 sewing machine accessories,cams,monogrammer and more. I loaned the machine to someone I thought was a very reliable person.Not !
[edit on Wikidata] The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air.
1 Attention: Required Reading for Anyone Seriously Considering a PEMF Device or PEMF Machine.  2 Don't Buy an iMRS 2000, Bemer 3000 (Now Bemer Pro), QRS Quantron, Medithera, MAS PEMF, Curatron, Ondamed, Pap-imi, PMT-100 or PEMF 100, MG-33 or MG-Pro, or any PEMF (Pulsed Electromagnetic Field) Therapy Device Until You Read This.. When it comes to PEMF devices, there are many choices and many opinions on which is the right machine to use.