Lauren from SWISCO responded:
July 14, 2023
Hello, thank you for posting, I agree that the 39-172 is the best match we carry for your original as long as the rest of the dimensions match up. Since yours has a 4-1/2" arm, you have two options to consider. You could try to move your sash bracket to compensate for the arm difference, or swap the arms altogether. This can be done by drilling out the new and old arms, then installing the old arm on the new operator using our 62-014 rivet. To install this rivet, you'll have to hammer it in; I recommend doing it over a metal plate, if you have one. Please review and let me know if you have any additional questions! Dimensions for 39-172
|