Searching for Replacement Entry Guard II window crank 20755

A quick learner says:
I need a replacement crank gear for a 26" x 35" Cantilever window. I believe it's a Caradco window and it is marked "Entry Guard II Truth 20755". Thanks so much.
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Emily from SWISCO responded:

Hello!

I recommend taking a look at the operators we've related for you on this page. Carefully look over the specifications and see if one matches what you're looking for. 

A quick learner from Upper Master Bedroom Windo says:

I'm thinking that the Entry Guard 39-031 or the Caradco 39-155 would work. (This is for a window on the right hand side which opens from the left to right with the crank.) See the updated pic attached with measurements to confirm which crank gear/arm mechanism is best. Thank you so much.

Peggy 

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Emily from SWISCO responded:

I'm afraid I can't confirm which of these operators you'll need for your repair. The determining factor would be the length of the link arm as shown in the images below. You'll need to measure the one on your old assembly to see which one matches up. 

Dimensions for 39-031
Dimensions for 39-031

Dimensions for 39-155
Dimensions for 39-155

A quick learner from Upper Master Bedroom Windo says:

OK. I'm not the installer so I'll just have to try and figure it out. This is the original window installed in 1988. But I'll see about measuring again and/or searching the original online to confirm dimensions. Thanks for your help.

Peggy 

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Emily from SWISCO responded:

I'm happy I could help, Peggy. Let me know if I can be of further assistance and best of luck with the repair! 

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