Question about Janome MyLock 634D Mechanical Sewing Machine

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Mylock 634D looping left needle stitches

I have the above serger and the left needle stitches are looping. I have adjusted the tension and it doesn 't solve the problem. Does it with any thickness material. What else can I check on it?

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  • kraats Jan 10, 2009

    Thanks, ended up removing all threads, cleaning it up and rethreading it and so far it is working properly. Will remember your advice if it happens again.



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Make sure the thread is in the tension disks. Do this by pulling the thread backwards towards the spools. Also set the tension on zero and check for any fluff, or thread that is stuck in the disks, preventing them from closing properly. Good luck

Posted on Jan 10, 2009


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here's 2 links for a manual one is a hardcopy & the other is a
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