Spinning crank!

A quick learner from DC says:
February 4, 2023
Hello I am looking for some guidance on what I need to replace so that my casement window will close. The crank works fine opening the window (top hinged dual arm) but spins back out of the base when attempting to close. It looks as if the retaining nut has stripped out the crank case.

I have a video has well but I am not sure of that uploaded.

Thanks,
Zach
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Lauren from SWISCO responded:
February 6, 2023

Hi Zach, thank you for posting,

It appears that the worm gear is stripped ,which will require replacing the full operator. To further review with the window open, we will need to see a clear view of the operator arms from a bird's view. Thank you! 
A quick learner from DC says:
February 14, 2023
Gotcha. I've attached some more photos. I hope these are what you are looking for.
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Lauren from SWISCO responded:
February 15, 2023

Perfect, thank you! 

Please start by reviewing the style and dimension of the 39-348 sill mounted awning operator to see how it compares to your original. Let us know what you think and if you have any additional questions. 
Sill Mounted Awning Operator
Sill Mounted Awning Operator
39-348
$61.10
Connecting a casement window operator to stud bracket
Connecting a casement window operator to stud bracket
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