Patty,

Singer 66 - all versions:

>Needles are 15x1
>Needle goes in flat to the right.
>Thread goes from left to right.
>Bobbin is Class 66
>When installing bobbin it rotates counter clockwise when you pull the thread.

If all these are right, and it won't pick up the bobbin, then the stars must be out of alinement. Or there is some other problem.

Yes you can replace the top tension with the later one. The machine casting wasn't changed in that area.
Or, you can get a new beehive spring at Sew-Classic.

And if you have the little metal connectors, I'd use a piece of the tubing slipped inside the tubing belt as a reinforcement so it doesn't tear out.

Joe

Thanks Joe! The beehive spring is in fine shape. It's the other one that's dicey. I read all the information you wrote and watched some videos on utube. I will try again!

Oh, the thread check spring. Sew-Classic has those too.

Joe