I ran across this, 2 years after your posting. You've probably already solved your problem or have gotten rid of the machine by now, but I have a Kenmore 1980 sewing machine. I absolutely love it! Although it has a lot of age on it now and knocked off the table at least once, it still runs. It does have some issues, but expected with age and the abuse it has received. I've never had problems with the feeddogs. I would assume the problem is beyond setting the pressure, located under the lid. I would like to find another Kenmore 1980 machine that I can use for parts, so if anyone knows where I can get one, please email me.