Please help need to thread Kingstar industrial overlocker KS 757F

Here is a random manual for a 3 thread overlocker

https://www.bglieberman.com/pdf-files/Liebersew%20737-manual.pdf

You are in South Africa, try this place

https://www.unosewing.co.za/kingstar?page=3

videos

https://www.google.com/search?q=Kingstar+KS+737F+manual

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copy and paste the following into google
https://www.google.com/search?q=download+manual+for+King+Star+sewing+machine+KS+8700&oq=download+manual+for+King+Star+sewing+machine+KS+8700&aqs=chrome..69i57&sourceid=chrome&ie=UTF-8

How do thread Kingstar KS 8700 industrial sewing machine

Perhaps this link will help:

Questions Answers for kingstar ks 8700 Sewing Machines

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Search the internet for:

Manufacturer + Model + the word "Manual"

If one or more threads are too tight, loosen those tension disks. To start out, set all tension disks at the halfway point between the high and low numbers, then adjust from there.

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try longer thread tails at least 4 to 5 inches and pull them to the back of the machine before you start sewing

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Why does my kingstar masjine dont make stitches when sawing

Hi i need a manual for a industrial sewing machine ( Kingstar DU4410L) can some one please help me