How Disassemble and Fix Thread Tension Dial

How to Disassemble Thread Tension Dial

You are having a problem with thread tension on your sewing machine? Tension a needle thread is very tight or loose? Sometimes need to remove a tensioner and clean it.
Here you will learn how to fix the tensioner yourself and bobbin thread troubleshooting also.

How to use the coverstitch machine

You have tightened the thread with a control tension dial as far as it will go, but the thread is still loose and bunching up on the fabric. You have tried many ways to fix this problem but unsuccessfully. In this case you need try to remove the tensioner with the machine and disassemble it.
Note: Sometimes to fix this problem is enough to clean the tensioner (between discs) from the dust, thread scraps.
It is easiest to disassemble and clean the tensioner of old sewing machines models

To remove the tensioner you need first remove the faceplate of sewing machine.

How to use the coverstitch machine

Look at this photo. These two arrows indicate the parts affecting on the thread tension.
Lift up the presser bar lifter. In this position both tension discs should not push the thread and vice versa.

How to use the coverstitch machine

If thread tension does is not changed you need loosen the set screw.
To loosen the screw it has to be rotated to the left.

How to use the coverstitch machine

Take off the thread tension assembly. Grip it with fingers and pull towards you.

How to use the coverstitch machine

The first thing to do is marking the assembly sequence. Some models of sewing machines have the features. If you have no manual you must be sure of how it goes back together.
Clean the machine area of tension first and all parts in the order they go back on.

How to use the coverstitch machine

Check the tension the bobbin thread also.
To increase the tension you need turn the screw clockwise and vice versa.
Sew a few probe stitch lines. If you still have thread bunching up on bottom side of fabric you need to check other parameters of working the sewing machine. Inspect the sewing needle with a magnifying glass first. If its tip is blunt remove it and set a new needle.
Make sure that thread are insert between the tension discs.
Sometimes is needed to change the type of sewing thread etc.

English isn't my first language, so please excuse any mistakes and help correct them.
E-mail for sending is on the contact page.

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