Replacement crank

A quick learner says:
Could you please help me find the crank I need for this Traco window. I tried the 39-187 but it wasn't closing the window. The zigzag arm is a little bit longer on the old one.Thanks
Thumbnail of the uploaded file named 8B058887-B914-44FC-AC54-BE8B01CD8F55.jpeg
Profile picture of Bob
Bob from SWISCO responded:

Start by looking at our 39-090. It has a 'Z' shaped gear arm, compared to the 'W' shape arm on the 39-187. Look over the dimensions and see if you think this is the operator you need. 

Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at 856-317-6263 or at