I'm trying to adjust the feed dogs on my treadle. Here's what the manual says: "To raise and lower the feed bar, turn the machine head back. On the end of the feed lever will be found two adjusting screws, loosen the small one on the upper side of the lever, then turn the large screw to the right to raise feed, to the left to lower the feed, then tighten the small screw." I've pretty sure I've found the screws, but I can't turn them. My big question is whether it would be safe to try WD-40 on them?

Billy told me that WD40 can be a treadle's best friend, I soaked mine.

I would try WD 40 with confidence.....

I tried the WD-40 and it loosened them right up. I was afraid it might damage the finish if I accidentally got it on the machine...

You asked my question!!! Thank you for addressing this. My White has feed dog problems too. Now I feel like I can handle it!

Worked well on mine!

Billy has reconditioned lots of old treadles, I would trust him. He has a big posting about this on this site. He is lostin51.