Yes, the treadle needs cleaned and oiled, too.
I'm going to guess that your pitman is
not wood. I can't remember what it is to do with the wooden pitman, but yes oil will help the other places.
https://sewingservices.tripod.com/oiling.html
https://i0.wp.com/www.treadleon.net/....jpg?strip=all
As quiltedsunshine said, to lengthen the stitch, you turn the knob on the pillar clockwise. There are some manuals that I believe would be for your machine at
https://ismacs.net/singer_sewing_mac...e-manuals.html I think that the 66 and both the 66-1 manuals are for your machine. One isn't the greatest, but it is for a 66-1
Janey - Neat people never make the exciting discoveries I do.
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