Singer 631 Sewing Machine Service Manual.
Models 631, 611
Here are just a few examples of what’s included in this manual:
* Inspection and lubrication.
* Presser and needle bar height adjustment.
* Time the rotating hook.
* Needle thread tension assembly.
* Hand wheel removal and replacement.
* Cam stack.
* Much more!
50 page manual.
Great diagrams!
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