Crank out window parts

A home owner from Andover, MA says:
We have older awning windows in our sunroom and a few of the cranks no longer work or are missing parts. Not sure which parts to get and would be looking for some guidance.
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Emily from SWISCO responded:

Hello!

We'd be happy to help but we'll need to see your awning operator removed from your window so that we can see the arm(s). 

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