Broken casement operator

A quick learner from Fort Lee, NJ says:
Hello! I have a broken casement window operator, but I'm not exactly sure which part is needed. I know it's an Andersen window though. I would really appreciate it if you could tell me what I need to fix it.

Thank you
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Casey from SWISCO responded:

Hello,

We'd be happy to help but we would need to see a photo with the window open so that the arms that operate the window sash are fully visible. Thank you!

A quick learner from Fort Lee, NJ says:
Thanks for your response! I've attached another photo. It seems as though the gear responsible for closing the window is missing. I appreciate your help
Thumbnail of the uploaded file named E302C294-F23C-4B74-863B-995F4A2D4913.jpeg
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Casey from SWISCO responded:

Hello,  

Take a look at our 39-146 and 39-147 Andersen operators and see how the dimensions compare to yours. Thanks for posting! 

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