Originally Posted by purplefiend

Chris,
You might have to take the bobbin case out and see if there is another thread caught underneath it.
There are lots of places to oil on the bottom of a 66, forgot a few of those myself. I was using mine last night it was very noisy, so I got the manual out and figured out where to oil on the bottom. Its much quieter now and sewing beautifully.
I got a purple onion award in the process of removing the belt from the treadle wheel, no belt shifter on this set of irons. I forgot that I have to undo the belt to take it off. I have a lovely bruise on the bottom thumb joint.
Sharon W.