Handle is getting stuck and not opening nor closing

A handy person from California, USA says:
This handle is getting stuck and not opening nor closing.
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Casey from SWISCO responded:

Hello,

It sounds like the gears in your operator may be the problem. We should be able to help but we'll need you to push the window open and show us the operator arms that move the sash to compare to our inventory. Thank you! 

A handy person from California, USA says:
Please se attachments
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Casey from SWISCO responded:

Thanks for getting back to us. Take a look and compare the dimensions of the 39-031 Entrygard operator to yours, paying close attention to the length of the shorter link arm. See the 39-032 for the opposite-ended version. These operators are compatible with the 39-107 cover and 39-205 handle. Thanks for posting! 

Dimensions for 39-031
Dimensions for 39-031

A handy person from California, USA says:
This another problem I have, but it's a different mechanism
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Casey from SWISCO responded:

Interesting, it looks like your casement window uses an operator designed for awning windows, which we do see from time to time. If you could detach one of the arms and show us the fitting that attaches it to the track, that would help us narrow down your replacement options.

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