I found your post looking for an answer to the same problem. My machine is a 9106. I manged to fix it enough to work and though you might like to know what I did. With the machine OFF remove the cover over the bobin case. Switch the feed dogs to DOWN. Using a small screwdriver lever the dogs into the upright position hold in place and switch to the UP position. Kinda anoying but atleast it sews, right?
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I just followed the suggestion given to me. I manually lifted the feed dogs after completing my task that required them to be lowered.
I found your post looking for an answer to the same problem. My machine is a 9106. I manged to fix it enough to work and though you might like to know what I did.
With the machine OFF remove the cover over the bobin case. Switch the feed dogs to DOWN. Using a small screwdriver lever the dogs into the upright position hold in place and switch to the UP position. Kinda anoying but atleast it sews, right?