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I have a Simplicity model 640 and it turns like it is supposed to go but wont move. Just makes noise. It was my grandmothers and I inherited it so I'm not too sure what to do?

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Try turn your hand wheel with your hand and if the rotary hook is not responding, the upright gear has worn out/timing belt is loose.

Posted on Nov 01, 2013

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Posted on Jan 02, 2017

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Bernina Record 730 - made in 1965ish. Recently he has started sewing very slowly although the bobbin winder worked normally. We cannot find out why this is happening.


Oh, no! Do NOT give up on your oldie but goodie! The symptoms are common with older mechanical machines. These machines are wonderful and deserve to be given another chance. Most often, the old oil solidifies and causes the moving parts to seize. With persistence, patience, and a couple of very simple supplies, many of these machines are happily sewing again. The secret is a combination of Tri-Flow and heat and making sure that "all" the moving parts get lubed, even the stitch levers and dials. I have resurrected several older Berninas using the following technique. Several completely seized machines required multiple repetitions over a period of days. If the machine does not have any cracked gears, most likely it can be made worthy again and make your grandmother proud that she gave you such a lasting, wonderful gift.

Resist the temptation to try to run the motor until the machine has gone through a thorough "treatment" and is moving freely manually. Once the machine is moving freely, you will rejoice at the happy and satisfied sound it makes!

Good luck with your lovely!

Wheel on right side that controls the needle up and down is very tight...

How can fix stuck needle bar on my Bernina 730

Nov 28, 2016 | Bernina Sewing Machines

1 Answer

How to wind my bobbin on a simplicity 640?


here is a link for a manual, it should have the information in it
Simplicity SL 630 640 Instruction Manual

Aug 12, 2014 | Simplicity Sewing Machines

1 Answer

Where do you add oil to the simplicity embroidery machine?


In the instruction manual it should show you where you need to put the oil. What sort of noise is it making as there may be a different problem such as stuff caught in the bobbin race

May 16, 2014 | Simplicity Quilter's Classic SW240...

1 Answer

Simplicity model 1512. - quite sewing- the motor will run but needle will not move


I would say that the belt is broken or has came off the pulley. If you turn the hand wheel, does the needle move up and down. If it moves up and down, your problem is the belt. Remove necessary covers to access the motor pulley. Inspect, repair or replace as necessary.
Please vote if my information is helpful or not. Recommend me. Thanks UAW 974

Jun 26, 2011 | Simplicity Sewing Machines

1 Answer

My simplicity serger SW432 wont cut


There are 2 blades, a fixed cutter and a moving cutter. The moving cutter should move approx 1/8" at it's lowest point past the fixed cutter. There should also be some pressure between the cutters

Mar 18, 2009 | Simplicity Serge Pro SW432 Mechanical...

1 Answer

Simplicity so5 needle wont move


There is a device on the right side of the machine to make this work. It is either a knob to turn or a plate to push in. It is located on the right side of the machine in the wheel that turns when the machine is running. This is used to wind a bobbin. The needle doesn't run when the bobbin winder is being used,

Jan 02, 2009 | Simplicity Quilt 'n Craft S05 Mechanical...

1 Answer

Repair and opertors manuals?


The cheapest manual I have found for the model 6440 is at http://gotoes.org/sales/VikingSewingMachineManuals/ViewInfo.pl?Viking=1&Sewing_Machine_Model=6440
It is a downloadable version also sent by email.
There is a free threading diagram including bobbin info at www.sewusa.com. Repair manuals are available on ebay and run ten dollars or more.

Oct 27, 2008 | Sewing Machines

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