I cleaned the stitch length regulator slide and arm.
but it really made it look funny with the rest of the feed mechanism..
Here begins the slippery slope of restoration...
I decided to remove and clean the feed system, I am glad I did..
here is my favorite part of the feed mechanism. I just like twisted steel.
and that lead me to decide to remove the bobbin holder
and that lead me to decide to remove rotating hook mechanism ...
THIS required a certain sequence of removal to accomplish. I figure most folks will not want to see the whole step by step tear down, i'll just show the results of removing the whole feed dog mechanism and rotary hook assembly.
Here is the collection of parts prior to cleaning. (minus the regulator arm cleaned earlier)
and after cleaning