Dave Sr. from SWISCO responded:
June 8, 2015
The 39-176 certainly looks like the right match. Pella don't really make a lot of variations on their hardware so I'm surprised it didn't work for you. I can't imagine they'd make the same kind of operator with only a shorter gear arm.
Then again, looking at your picture, it almost seems that the link arm and bracket are made from a different material than the gear arm and operator base. I wonder if your existing operators were altered in some way in the past. Perhaps they had a 39-096 base but installed the 39-176 link arm, for whatever reason. Do you think you could replicate that kind of thing? That may be your only option. You could also see if you can retrofit the 39-097 bracket on your window, though I'm not sure what would be necessary. |