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.
Start by describing the different steps in PEFR measurement to the patient. These are: 1  Connect a clean mouthpiece. 2  Ensure the marker is set to zero. 3  Stand up or sit upright. 4  Take as deep a breath in as you can and hold it.  Place the mouthpiece in your mouth and form as tight a seal as possible around it with your lips.