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Timing a viking 990

Hi. Can you tell me how to time the rotary hook on a viking 990 sewing machine? It has a vertical hook.
Thank You, Karen Williamson
kfwilli@hughes.net

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Impossible to explain how to time a sewing machine you need to be shown. Basically it entails setting the needle depth then making sure the hook passes just above the eye of the needle at a set height as the needle is rising, this ensures the hook catches the upper thread. Also the hook needs to be set a specific distance from the needle. Sounds easy but sometimes it can be very difficult and fiddly job.

Posted on Apr 02, 2008

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Posted on Jan 02, 2017

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Be sure to check these machines out very carefully. They have electronic boards that, after 25-30 years, may be nearing their end of life with very few or no replacements available.

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Where can I obtain a Viking 990 instruction manual


You can download one here https://www.youtube.com/watch?v=enMfJZhYwdQ

They sell them here $4.99
http://manualsoncd.com/product/viking-990-prisma-sewing-machine-instruction-manual/

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try to find a very old sewing machine dealer or a family dealer - you would be amazed what you find in these old stores. just have the patience to go from one to another until you find something!

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Where can I find parts for a Viking 990S?


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Ron Anderson at A1 sewing is someone I've known for about 20 years on the net... he's always been helpful to DIYers on the usenet group "alt.sewing", and has a good reputation as a source of parts: ron@a1sewingmachine.com -- I'd try him if you don't have a good local repair shop.
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My needle has started hitting on the bobbin case in the mahine,can anyone tell me how to fix this problem.


Could be a couple of things:

Could be a bent needle? please change it for a sharp new one and make sure it goes in correctly, flat shank to the back.

Bobbin case dislodged or not in correctly ; I think these are vertical rotary hook machines with the bobbin inside a removeable bobbin case? Check that you have put the case in correctly, there is usually a long finger on the case that latches into a point on the rotary hook, holding the case in the correct position. Probably also a latch on the front of the bobbin case, which you use to fit it into place and remove it.

Lastly could be that the machine timing is out. Manually turn through a stitch sequence with no thread or bobbin, the needle needs to be at its lowest point down into the bobbin area when the rotary hook brings the thread around to catch at the back of the needle.

If you suspect it is the timing, you may want to get a technician to do this repair but certainly try the first two items first.

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Now I am assuming that you have replaced the needle.

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