Question about Brother NX-400

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Balance wheel is totally jammed

Machine was working fine when suddenly it just jammed up. Everything seems to be fine, but the balance wheel is completely jammed rigid. I've looked at the shuttle and there are no thread jams at all. The needle moves fine from side to side with different stitch selections, but wont go up and down with the wheel. I have tried looking in the machine, but I can't find any thread jammed.

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  • katie_lafaw
    katie_lafaw Feb 07, 2012

    I have the exact same problem! Was just sewing a straight line in some cotton (a very very loooong line) and suddenly the machine completely jammed. I removed the thread spool and bobbin with no issues, and can't find a jammed thread ANYWHERE. But the wheel is stuck! Help!

  • Jimmie Sill Aug 08, 2014

    TRY TO REMOVE THE BOBBIN ASSEMBLY AND TURN IT. IF IT TURNS YOU PROBABLY HAVE THE WRONG BOBBIN. ALSO, MAKE SURE IT IS INSTALLED SO THE ASSEMBLY CAN BE LATCHED PROPERLY. IF THIS DOESN'T WORK YOU MAY NEED TO ADJUST THE HANDWHEEL. FOR THIS I WOULD SUGGEST YOU TAKE IT TO YOUR LOCAL SHOP. ALSO, CHECK YOUR NEEDLE AND SEE IF IT IS MAKING CONTACT WITH THE HOOK (POINTED THING UNDER THE BOBBIN). IF IT IS THEN EITHER YOUR NEEDLE IS INSTALLED BACKWARDS OR IS CROOKED. IF THIS DOESN'T FIX IT THEN YOUR HANDWHEEL MAY NEED TO BE ADJUSTED OR THE OLD GREESE REMOVED AND NEW GREASE INSTALLED. THESE ARE THE MOST LIKELY PROBLEMS.

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Machine was working fine when suddenly it just jammed up. Everything seems to be fine, but the balance wheel is completely jammed rigid. I've looked at the shuttle and there are no thread jams at all. The needle moves fine from side to side with different stitch selections, but wont go up and down with the wheel.
I have tried looking in the machine, but I can't find any thread jammed.

Posted on Nov 17, 2008

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You really should clean and oil/grease the entire thing. Dust, lint, old oil and grease can harden making your machine not run properly. Another thing that may be causing you issues is dried up and gunked up grease on some inner gears. Take off as many access panels as you can and use a tooth brush to remove yellowed dry grease from gears, replace the grease with one made for sewing machines. Lightly grease... just a little dab will do it. Turn the machine by hand to work the grease around the gears.


Make sure it's out of bobbin winding mode. Do you remember if you had had to replace the motor belt or had to take the hand wheel off for some reason?

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I like to use Liquid Wrench for especially stubborn machines that have been sitting. Don't use WD40 it will free up rusty things but you have to wipe it down well and re-oil. Liquid Wrench is petroleum spirits (kerosene) and graphite, much better for the machine in the long run.

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