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I lost my manual for singer model 4525 and am not sure I am threading it right do you have a diagram, also how do I adjust the tension?

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  • Singer Master
  • 1,122 Answers

Found this for a 4526 - it could be very similar to your machine.

http://www.sewusa.com/Threading_Diagrams/Threading_Pages/Singer_Sewing_Machine_Threading/singer_4526_4528_4530_threading.htm

there is also good general machine help on www.sewing.about.com which gives generic threading help, trouble shooting etc.

Tension is usually controlled by a dial on the top thread, and a little screw on the bobbin case on the bottom thread. However, if you adjust either, just small increments is best to avoid making things worse. Top tension usually set to 5 or middle number and bottom tension shouldn't often need touching.

Posted on Apr 10, 2011

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Assembly instructions for Singer Merritt 4525


The service manual for that machine can probably show you, and I would make sure and get the parts list as well. I just checked Sewing Parts Online, and it was not listed, but if you send an email to them (they give the address at the top of the page), they can and will purchase it for you. Usually takes about 2 weeks. However, I just saw a used one in nice shape on eBay for $72.99 and $27 shipping in the original box, so you might consider just buying another one. I also noticed that a new tension assembly is being sold for $18.95 including shipping, and if you write to them, they may include replacement instructions. Just do a search on Singer 4525 on ebay--they have all kinds of bobbins, foot pedals, and parts for it.

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I have recently bought Singer Quantum 9940 and I am not happy with the stitch. For zigzag stitch, I can see too much of the upper thread on the bottom side. This happens unequally: more on the right hand...


1. Make sure your needle is correct for the fabric. Go buy some good needles in several sizes. You'll need a 90 for jeans, rounded points for fine fabrics... get a few sizes. Your manual should provided you with clues to the right needle for the fabrics. (BTW... there really is no such thing as a Universal Needle... toss it.)

2. Re-read your manual and carefully follow the instructions on threading the bobbin and the upper thread...

3. Check your tension on the upper thread... it is too loose for the application. The tension on the bottom thread is handled by a spring on your bobbin case or race. If you do not have that threaded properly you'll have problems. Same with the direction the bobbin turns... have in it backwards... problems.

Barring all these things... It might be time for a qualified Singer repair person to look at it. Sadly Singer has seriously lowered it's standards in the last 20 years.

Feb 05, 2011 | Singer Quantum 9940 Computerized Sewing...

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Singer 5040c i just bought this machine it was working fine but i thought i should clean it after cleaning all of a sudden the bottom thread is looping up all over and the tension is not right. When I...


Do you have your manual? Because it is almost always the top threading, either tangled thread or a bent or dull needle causing the problem. You can download your manual at www.singerco.com for free and enlarge the detail of the diagrams for threading. I just hope that it is something simple and not your timing because that is not a do it yourself job, unfortunately. You can also call Singer customer service at 1-800-4singer. and get their advice. Good luck.

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Bobbin thread


Not completely sure on your model but you have to adjust (loosen) the tension on the top thread to match the tension on the bottom thread. Usually there is a wheel on the upper right of the machine. the tension adjust is the knob inside that wheel. Turn counter clockwise about 1/8 turn. Then try and repeat until it works. Check owners manual for top thread tension adjustment if needed.

Good luck.

Please rate me.

Nov 21, 2009 | Sewing Machines

1 Answer

Lost manual. how to thread?


all machines thread the same. TTN tension,take up, needle.
Beginning with the spool, guide the thread through the thread guides to the tension assembly. Pull the thread through the tension assembly and test it to make sure the tension is working correctly.
(To do this test,adjust your tension setting to normal or medium or 5 or something in the middle. Raise the presser foot and pull the thread through the tension. It should pull easily!! Lower the presser foot and pull the thread. It should pull noticeably harder.) If it passes this test, continue up through the take up lever,then down through the thread guides to the needle. Make sure your needle is fully inserted and turned the correct way.( If you load your bobbin case from the left side,the needle rule is normally FLAT to the RIGHT is RIGHT. There are some exceptions. If you have a newer style drop in bobbin or your bobbin case loads in the front then the rule is FLAT to the BACK.

Sewman7

Apr 23, 2008 | Singer 1525 Mechanical Sewing Machine

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