Thank you, bkay, for getting the instructions to post pictures so quickly.
Welcome, Errand. I've never dealt with one of the machines that has a chain, wire or cord to raise the machine. I would second Leon's excellent advise to check out the chain mechanism.
I agree with Joe's post.
I know your machine is a tad different than the Improved Eldredge B, but I'm thinking the threading may be similar. More than likely your uses the 20x1 needles. I'm wondering if one or more of the following would be helpful to your machine.
Manual for Eldredge Improved B single spool
Needle type for Eldredge "B" (Improved) Treadle?
National Improved Eldredge type B manual?
Janey - Neat people never make the exciting discoveries I do.