Singer 401-401A Sewing Machine Service-Parts Manual.
Adjust:
Set presser foot at correct height.
Thread clearance.
Feed timing.
Eliminate end play or binding of horizontal arm shaft.
Time the cam stack.
Stitch regulator.
Needle bar vibrating bracket.
Zero-out the machine.
Time the rotating hook.
Feed forked connection.
Hook driving shaft.
Take-up lever.
Setting feed.
To set the check spring.
Gear lubricant.
Wiring diagram.
Parts list.
Much more!
42 page complete service manual plus a 2 page parts manual with diagrams.
This is a Service Manual. If you need the instruction manual, please visit our shop here.
Singer 401-401a Sewing Machine Service-Parts Manual.
Singer service manuals
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