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Mylock 334d how to replace upper looper

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  • 84 Answers

I advise tha you have it done by a repairer as it must be done with great precision. You can damage the loopers if it is not set correctly.

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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bargainbox
  • 1388 Answers

SOURCE: My serger

Self threading is perhaps not exactly correct, however there is a guide with an armature to release the guide to enable easy access........have a look in you manual

Also take a look at this image and move the lever to use it.....all will be easier to see with the needle plate off ....until you become familiar with the operation

704592d.jpg

Posted on Feb 17, 2008

  • 4 Answers

SOURCE: Janome MyLock 644D

Yes, the model I used had a self threading lower looper. Just put the thread into the guide and flick the switch

Posted on Jun 11, 2008

SOURCE: Lower Looper Shaft

MY LOWERLOOPER HAS SNAPED

Posted on Jul 16, 2008

bargainbox
  • 1388 Answers

SOURCE: I need to know the proper tension of a Janome 334d Mylock.

Check there is no thread caught in the tension units and set them ALL to 3 for the Factory setting......try a sample.....if it looks good, OK, if not, try to balance it by gently altering the knobs on the right (loopers) until they form an even tension in balance with each side of the fabric.

Posted on May 31, 2009

  • 34 Answers

SOURCE: I need a manual for

The manual is located on the manufacturer's website, here. Click "Specifications" then "Download Manual. It is a PDF.
http://content.janome.com/index.cfm/Machines/Sergers/MyLock_634D

Posted on Mar 13, 2011

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1 Answer

The upper looper shaft has shifted and the needle hits the lower looper needles. It now locks and am unable to sew. I have a MyLock 334D. Does anyone have a solution.


Most likely the machine is out of time. Probably best to take it for service as sergers are very difficult to time accurately.

Feb 05, 2017 | Sewing Machines

1 Answer

The tread from the lower looper is not being picked up by the upper looper how o i fix this?


Best advice would be to consult your owner's manual. The most common serger problems are caused by incorrect threading or not threading the threads in the proper order. With most sergers, the upper looper should be threaded first. The lower looper is threaded second and the lower looper thread tail should drape OVER the upper looper. Then thread the needles.

Be sure when threading that each thread is pulled snugly into the tension disks.

...

Nov 15, 2015 | Janome MyLock 644D

1 Answer

The Upper Looper snapped out of place!


the serger needs to be checked to see why it snapped out of place. there not suppose to do that.

Jun 14, 2015 | Janome MyLock 644D

2 Answers

I need a manual for janome Mylock 334D please


The manual is located on the manufacturer's website, here. Click "Specifications" then "Download Manual. It is a PDF.
http://content.janome.com/index.cfm/Machines/Sergers/MyLock_634D

Mar 13, 2011 | Janome MyLock 634D Mechanical Sewing...

1 Answer

How to thread up and the correct tension for chain does the lower looper thread go over or under the upper looper thread


What make and model overlocker?

Best bet is get hold of a manual for it; try the manufacturer's website, www.sewusa.com , www.sewingpartsonline.com or www.diplofix.com to obtain one.

You may also find some general information on www.sewing.about.com.

My Bernina 334D, sequence from L-R, is thread 3, thread 4, then needles, so top looper, bottom looper then needles. But if yours has a chain stitch it would probably be a little different.

Mar 03, 2011 | Sewing Machines

1 Answer

Upper looper will not saty trheaded to sew what


You have to thread the needles last.

1 - Take the threads out of both needles.
2 - Thread both loopers according to the diagram on your serger.
3 - Thread the needles.

If this fails, you need to bring it to a pro for service.

Feb 11, 2010 | Janome MyLock 634D Mechanical Sewing...

1 Answer

I need to know the proper tension of a Janome 334d Mylock.


Check there is no thread caught in the tension units and set them ALL to 3 for the Factory setting......try a sample.....if it looks good, OK, if not, try to balance it by gently altering the knobs on the right (loopers) until they form an even tension in balance with each side of the fabric.

May 24, 2009 | Janome MyLock 644D

1 Answer

Threading


This LINK is for the 334D and is essentially the same.......there should also be a small threading diagram inside the door at the front

Apr 29, 2009 | Janome MyLock 634D Mechanical Sewing...

1 Answer

MyLock 634D won't serge


Check that your lower looper is actually threaded and not tangled with the upper looper (needle thread) when it moves. I wish they'd include pictures in the manual how to lay the thread.

Apr 05, 2009 | Janome MyLock 634D Mechanical Sewing...

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