I disassembled a 66-1 several months ago... got the parts clean, but hadn't gotten around to reassembly. Now, I have a friend that wants it, and since I have FIVE red-eyes I said sure.
I cannot get the presser foot bar to slide freely. I have tried heat, fresh oil, everything is clean... it is like the metal expanded in the baggie! I do remember that this machine was a terrible pain to get apart... I had to pound on it after the set screw was out to loosen it.
Any ideas? it will lift normally, but when I lower it the foot takes about 3 minutes to sliiiide down. The tiny screw is the back has been taken out with no change.
