How do you thread a singer sewing machine? - Singer 3820 Mechanical Sewing Machine

hi Patty.
if you go to this link there is videos showing how to do this.
Singer cg 500 sewing machine How to thread bobbin upper thread Google...

When you thread the top thread, the thread will drop down on the right side of the tension mechanism and go around the bottom (clockwise) and up the left side. Grab the thread somewhere above the tension mechanism with your right hand and then pull the toward the right (as though you are going to close the circle around the tension disk. The thread should pull on the metal wire (spring) and your thread should pop into the correct position of the tension disk. When you release the thread, the wire spring should pop back to the left. Then you will continue threading through the remaining thread guides and the take-up lever.

Here's a service manual for your machine (in case you need one):

Singer 20U31 Service Manual

Threading video:
Threading Singer 20U 20 33 industrial sewing machine

Singer 20U Industrial Sewing Machine Tutorial

Singer 20U Industrial Sewing Machine Tutorial

Bobbin winding on the Singer 20 33 or 20U

this video shows threading the tension disk:

How to Thread Singer Industrial Sewing Machine

try this link... Threading Machines ..or this one... How to Thread 5050 Singer Sewing Machine ..or this one... How to Thread Singer Sewing Machine

This may help:

How to thread Singer 6740 Sewing Machine

Singer 6740 manual

Singer 6740 Sewing Machine Instruction Book

SINGER 6740 6790 Sewing Machine Manual

Singer 6740 threading diagram Google Search

...

Learn more about your machine here:

Singer Sewing Machine Company Serial Numbers

There are tons of diagrams, web sites and videos about older Singer sewing machines. A lot of them are very similar, so finding information for one will most likely be beneficial.

How to thread vintage round bobbin sewing machine Singer 99K

How to Wind Bobbin Thread Case Vintage Antique Singer Treadle Sewing...

How do you thread an old Singer sewing machine

threading antique Singer sewing machine Google Search

...

Singer 338 Sewing Machine
Singer 338 Basic Clean and Lube Part 1 Supplies
How to set up singer sewing machine MP4

Not sure what you mean by "vertical" bobbin. Everything I've found indicates it is a top loading bobbin that sets horizontally in the machine.

These sites may be helpful:

Threading the ITP Singer 534 Stylist

Singer 534 Stylist Sewing Machine Threading Diagram

How to Insert the Bobbin in Singer 534 eHow

Singer 534 stylist bobbin threading Google Search

just work here singer stylist 534


///

The balance stitch control on this model is below the stitch patterns; to the far right.

If you need a manual you can download a free one at the Singer Company website.

http://www.singerco.com/resources/threading.html Check out their threading diagrams, they are really helpful!

You can find Singer threading diagrams at http://www.singerco.com/resources/threading.html.