How to install balls into ball nut?

There isn’t a ball holder inside ball nut, so the balls are easy to drop out when you disassemble ball nut from ball screw.

What can you do when the balls drop out during assembling?
The ball nut is still functional if just one or two balls drop out.
But if there are lots of balls drop out, you need to reinstall them into ball nut.

This video will show you how to do so. 
https://www.youtube.com/embed/e73hmOgmOw4

Here is the chart for balls diameter inside each ball nut. 

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