Question about Juki MO-644D Mechanical Sewing Machine

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I need replace thread holder for Juki MO-644D serger

It's a serger and I broke the plastic cone holder

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  • Juki Master
  • 1,564 Answers

Good luck. I found a replacement part for one of mine on Ebay. Just search for Used Juki Serger for parts. Maybe you'll find a 644D for cheap enough that you can scavenge parts for a few more years.

Posted on Nov 06, 2012

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Posted on Jan 02, 2017

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Sewtech1
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SOURCE: How do I thread the Juki MO-644D?

Email me at sewingnz@gmail.com should be able to help.

Posted on Jan 19, 2010

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1 Answer

Serger motor locked up completely


I suggest taking the machine in to be serviced

Jun 09, 2012 | Juki MO-644D Mechanical Sewing Machine

1 Answer

JUKI MO 134 SERGER


How to Thread Juki MO-134 Serger from watching lady at Lyles. Turn upper blade up. Push in first then turn up.It makes threading easier. Blue Thread upper looper first. Pull thread through tension knob. Don'tjust lay it there. (She thought that is what I must have done) Orange Thread lower looper next. Pull thread through tension knob as inthreading upper looper. Adjust lower looper so it is right nextto upper looper so that their points are almost together and directly belowsewing needles. Lower looper will be in front of upper looper (I believe). With tread from upper looper pulledback, slightly lift lower looper above upper looper and thread. I think this isright. Pull thread back with other thread. Tension is the key. Remember that. Yellow: Thread left needle first.Remember tension. Pull thread through curled wire on left side of needle arm. Green: Thread right needle. Rememberabout tension. Pull thread through curled wire on right side of needle arm. b> Note: Before sewing turn the wheel tomake sure the stitches are going together correctly.

Apr 16, 2010 | Juki MO-644D Mechanical Sewing Machine

3 Answers

Good diagram showing how to thread a 4 thread Juki 644d serger we do not have a manual machine is not clear


You can download a free threading guide here - http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Juki_Sewing_machine_threading/Juki_MO_644_Threading_Diagram.htm

The same site also sells manuals.

Threading Tips:

Have the thread antenna at it's highest position.

Set the tensions to zero.

Have the presser foot up while threading.

When you thread a serger for the first time, or if you are having a threading problem, use a different color thread for each guide. This can quickly indicate where the problem lies.

Once the stitch is satisfactory, change to the color you prefer - but this way is the easiest - cut the thread near the thread cone and tie off with the new thread. With the tensions at zero, slowing run the serger until the new thread appears. You will need to stop as the knots approach the needles and thread them by hand.

Do the tie-off before running out of thread and this will save a lot of time and stress.

Mar 02, 2010 | Juki MO-644D Mechanical Sewing Machine

1 Answer

How do I thread the Juki MO-644D?


Email me at sewingnz@gmail.com should be able to help.

Jan 19, 2010 | Juki MO-644D Mechanical Sewing Machine

2 Answers

Looking for an online manual for my Juki serger MO-634DE


Herre is a link to the threading diagram: http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Juki_Sewing_machine_threading/Juki_MO_634_Threading_Diagram.htm

Oct 08, 2009 | Juki MO-644D Mechanical Sewing Machine

2 Answers

2nd needle/4th thread - threading confusion


With some sergers, but not many (singer 14u64 comes to mind), the top of the stitch will be an overedge that mates with the right needle thread, and the left needle thread will appear as a separate straight stitch. When you look at the underside of the stitch, the overedge will go all the way over to the left needle (the full width of the stitch). This is normal if you have this type of machine. Another stitch some sergers do (2/4 thread sergers) is a 2 thread chain thal looks like a lone straight stitch on both sides, and a 2 thread separate overedge.

As far as the threading of the takeup, it totally depends on your model. Always post your model number when you have questions as sergers vary greatly in design.

Mar 11, 2007 | Juki MO-644D Mechanical Sewing Machine

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