I have a white speedy lock serger model 7340. I completely pulled all threads out and now trying to re-thread new thread. I have tried around 15 times. It will not loop. Threads don't interlock at all

Hopefully you have the manual. It helps to use 4 different colors of thread so you'll be able to differentiate which thread is presenting a problem.

Just thread each thread as though it were the only one, like a sewing machine. Make sure you thread each in the proper order or it will most likely never work. AND ALWAYS RAISE the presser foot when threading and give each thread an extra little tug when going through the tension disk so the thread will seat completely.

Set the tension disks to the midway point, so they are all set about the same. Then test.

If something goes haywire, just bite the bullet, remove ALL the threads and start over threading from the beginning. Believe me, it very seldom works to try to re-thread only one thread...

It took me an entire day to get my new-used serger threaded properly. So don't despair... You might look around for a beginning serger class.

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The manual would be helpful:
http://www.sewingpartsonline.com/white-sewing-machine-instruction-manuals.aspx

Be sure the presser foot is RAISED when threading the machine. Give each thread an extra little tug when going through the tension disk. Always thread each in the order specified...threading the threads in the incorrect order will most likely end in failure and frustration. If the machine malfunctions, breaks a thread, etc., it is always less painful to remove all the threads and start over from the beginning.

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Yes, thread the upper looper first, the lower looper next.

***Make sure that you have the presser foot RAISED during the ENTIRE threading process until you get to the point of threading the needles.

The second to last step in the lower looper process is to make sure lower looper thread DRAPES over the top of the upper looper & thread, then both thread tails get pulled under the presser foot and toward the back of the machine.

Give each thread a little extra tug as it goes through the tension disk to make sure it is seated. Verify that all the threading steps have been followed. Any skipped steps, extra thread wraps, or incorrect threading will most likely cause a problem.

Make sure you have brand new needles before threading. If one is bent or damaged, you will probably have issues with skipped stitches.

Set all the tensions to the midway point (the factory standard for regular chain stitch). The tensions can then be tweaked when the machine is correctly creating a chain.

If the machine messes up, breaks a thread, comes unthreaded, etc., save yourself some time and frustration and RETHREAD everything from the beginning. Trying to rethread out of order usually fails!!!

Once you are more comfortable with your machine, you can try fishing a thread, but even experienced serger users still have trouble with this.

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The machine has probably been knocked out of time. Unfortunately, you may need to have a professional service it.

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It's an odd thing but on my serger, it actually matters the order in which I thread it. I *try* to tie the new thread to the old and pull it through rather than re-threading, but when I've had to re-thread, I've had trouble getting it to loop again when I thread left to right. It seems that the loopers only loop if the right looper is threaded before the left.

You will have to order the manual from a Baby Lock dealer.

This model may have to be threaded in a certain order.

Try raising the presser foot and setting the tensions to zero.

Turn the handwheel so the upper looper (the curved one) is at it's highest position - there may be a mark on the side of the serger where you align the handwheel for this.

Thread the upper looper and then the lower looper and then the needles.

Pull the threads under the presser foot and toward the side of the serger.

Set the tensions back to 4 - 6, lower the presser foot.

Hold onto the thread tails and gently press the power pedal to begin a thread chain before serging fabric.

All tensions should be on 4. Also, make sure the threading is done correctly. Or if you wish; You can contact me on other sergers for sale. "Best prices guaranteed"! [email protected]

I hope this helps. there a lot of other vidios you can try as well. DFD

When you thread the serger, your suppose to start threading the 3rd spool (left to right) first, then the 4th spool, then thread the 2nd spool which ends up in the second needle (left to right), There is a lever or bottom looper that the thread must go through before placing thread through the 2nd needle. Finally, the last spool to thread is the 1st spool (left to right). Follow the threading pattern and once you put the thread through the two loops that look like springs, turn the wheel at the right toward you until you can see like a lever with a ****, thread that **** from the back then put the thread through the machine to the right. Turn the knob to toward you again until the upper looper is showing, then you have the put your thread through the hole in that looper then through the first needle. You should now have 4 thread toward the back of your machine which you need to place under the presser foot and to the left side of the machine. There is also a VHS video that goes with the machine to help explain how to thread your serger. Also be sure that each spool of thread is in the tension of the upper colored tension wheels. If it is not, then your stitiches will be loose. Good luck and I hope this helps. I had to watch the video several times before I got it. If you don't have the video, try ebay for and perhaps you can obtain one. The video is Speedylock 1600, instructional video, USA Part #136000016, Perhaps you can contact White and see if they have one you could purchase.
Good Luck Serging!!!!

I was in a similar position (but had the manual). The manual isn't as complete as I'd like. Anyway, what finally got mine working were the following:
1. turn all tensions to zero before putting thread through them
2. thread the upper looper, then lower looper, then needles.
3. when threading the lower looper (mine kept pulling out), after passing the thread through the looper eye, it needs to go pretty much straight up, not wrapping around anything else - other thread, for example. Mine was at one point trying to wrap itself around a post.
4.when everything is all threaded up, make sure all threads are under the foot *and* pulled to the left (even though the manual says pull to the back). Then chain off without fabric, turning the handwheel by hand to make sure loops are forming. If so, adjust tensions to where you think they should be (mine are currently all between 2 and 5), and add fabric. Then tweak as needed.

For me, this was a lot of trial & error, hair-pulling, and getting tips 1, 2, and 4. I figured out #3 on my own, with much swearing along the way. Good luck!

LF