I have a manual for the Grover and Baker No 9. You should have a thread guide just above the tension on the back of the face about level with the take up lever. This is a small tube guide the the thread will pass thru and then down to the tension disc. It is on the back right about where the slot is for the arm. It may be missing do you have a hole there? If so I would make a wire thread guide to stick in it. I will scan the manual if you like. Mine sews great a little noisy but works fine.
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Last edited by Glenn; 11-16-2015 at 01:14 PM.