Dave Sr. from SWISCO responded:
November 30, 2017
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Dave Sr. from SWISCO responded:
December 6, 2017
I'm not sure what the issue may be, then. It's possible the 39-074 isn't the right replacement for your window. You could also potentially use the 33-077 double groove pin with a 21-161 E-Ring. Could you send us some photos of your original operator, along with some photos of the window and how the operator relates to the linkage in the side of the window? That may clear things up.
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