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I need to know how to thread a singer 401a sewing michane

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try here for your model or something close. they all follow the same pattern

Posted on Sep 12, 2010


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Posted on Jan 02, 2017


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Singer sewing machine 401a how to thread machine

Go to the Singer site and click Support, then Instruction Manuals and fill in your model number. I checked -- it's a free download, and it's there.

Feb 16, 2017 | Singer Sewing Machines

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Singer 401a. Sews material fine. Using a leather needle/machine goes thru material with ease but threads do not stitch together. Just pokes a row of holes. What needs to be adjusted??

Since I can't examine your machine, I'll give you some suggestions. You may find some of them obvious, but these are things I have found when repairing various machines.
First and most obvious, make sure the needle inserted correctly. The 401a uses a flat shank needle such as a 15x1, 130h/705. The shank needs to face to the rear with the groove in the shaft running all the way down the front of the needle to the eye. In backwards (yes, it is possible to do), it won't form a loop and the hook won't pick up the top thread.
Second, you will need to check both hook to needle timing and needle distance. You can visually check if the timing is close by turning the wheel until the needle is in the bottom of it's travel. Then raise it until the very front of the hook is behind the needle and not sticking out. The hook should be above the needle eye. If it isn't or very close, your timing is probably out.
The needle distance is the horizontal distance between the needle and the hook. The hook should be very close (usually .01mm).
With leather the loop may be smaller and the hook just can't catch it due to one of the above conditions.

Aug 11, 2015 | Singer Sewing Machines

1 Answer

Where can I find a repair manual for a singer 401a

Search the Sewing Dude's site
the search window is in the lower right of his homepage. He has the manual but has had problems with people selling it on ebay, so I am only leading you halfway there (one search will get it for you).

Sep 13, 2014 | Singer Sewing Machines

1 Answer

Need a free manual for a 401a singer sewing machine

Go to the singer website
Go to the home page
Go to customer service--click on it--it will show a small menu--click on instruction manual
In the box put the model number (example 401a) & click search

Jun 09, 2012 | Singer Sewing Machines

2 Answers

I need to put the tension assembly back together properly for a Singer 401A

Here is an exploded diagram for all the parts in your 401A machine. I have the same machine and needed the same diagram--for the tension assembly.

Jan 04, 2012 | Singer Sewing Machines

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I need a repair book for singer 431 sewing machine book for a

Hi Elizabeth,
I also have a German Singer 431G. Haven't been able to find a Service Manual
for it. The guts are probably very similar to the US Singer 401A, you may be able to refer to that.

You can download the very hard-to-find technical Singer 401A SERVICE MANUAL == FOR FREE==
(in the back of the 301A Manual - then scroll down to page 125): I'm looking for help with Chainstitching. Do you have those instructions in your 431G User Manual? Also looking for the PART NUMBER of the 431 Chainstitch Throat Plate.

On AMERICA Online, I am PattBHS66.

Contact me and we can talk.

Thanks. And Good Luck!

Happy Thanksgiving!

Patt Anderson

Nov 21, 2011 | Sewing Machines

1 Answer

I have an old singer sewing machine 401A. The top thread/needle won't pick up the bottom bobbin thread when it sews. What do I do?

You can download a manual for $10 at and it should help you. A couple of suggestions though, is your needle inserted correctly? Flat side facing the rear of the machine, fresh needle? Threaded correctly on top and bobbin area? Is your thread good not too old and the same type in bobbin and top? Did you leave a long enough tail in the bobbin thread? 3-4 inches which you hold with your left hand. Is the thread in the bobbin unwinding the right way? Are you turning the handwheel towards you, not away from you at least two revolutions or until you see the thread loop? Try these suggestions, and I am sure one will work unless your timing is off and it needs professional service.

Sep 20, 2010 | Singer Sewing Machines

1 Answer

The bobbin in my 401A jamsafter sewing only a few inches leaving a knotted "mess" on the fabric . How can I repair this?

Something is not threaded right on the top, or the thread is tangled. Take the thread completely out and rethread. Also, make sure that no thread is caught in the bobbin area, if necessary take bobbin casing out and clean with a brush. Always turn the handwheel towards you, never away from you because it can mess up the timing, Also google Singer 401a there is a great blog on this machine

Aug 27, 2010 | Singer 3116 Simple

1 Answer

Singer 404-

Here's a manual for it on this site.

These two sites may be of some help.

401A Singer

Sep 16, 2008 | Singer 7462 Mechanical Sewing Machine

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