Replacement cranks needed - very old

A home owner from Penn Yan, NY says:

I am in need of 3 left and 3 right of the cranks shown. The housing is 2-1/2" from front to back (I had a photo, but your system limited me to 5 uploads). Can you help me? Thanks.

Russ

Thumbnail of the uploaded file named Fisher-1.jpg
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Bob from SWISCO responded:

Looks like you have an older Andersen operator from back in the 60's, or even older. This part is no longer made but see if you can use our 39-366 operator with as a replacement. If so, you will also need the 39-114L handle.

A home owner from Penn Yan, NY says:
Hi Bob,
Thanks for getting back to me. Do you have a technical drawing for the 39-366 showing all housing dimensions? The molding is mortised to receive the existing cranks and I'd like to have a better idea about the fit. Do you think I will need replacement track as well? Thanks,

Russ
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Bob from SWISCO responded:

See the image below for further dimensions of the 39-366 's base. Unfortunately, you likely will have to modify the sill in some way to fit this new operator in; I can't say for sure, but it's pretty common when replacing these older assemblies. It would be best to replace the track as well--see our 39-520

39-366extra
A home owner from Penn Yan, NY says:
Hi Bob,
I ordered the cranks you recommended and with some significant modification, was able to make them work - and they work great!

It's somewhat difficult to tell from the photos I uploaded, but my old crank arms have an offset DOWN. I see that you only have one offset crank and it is bent UP. Sooooo, I carefully bent an offset into the cranks I ordered, widened the mortise in the molding and they worked. I used my original track because it has an "S" shaped profile and you didn't have anything to match. I did have to flatten the stop-dimple because your cranks are 1/2" longer.

It was some work, but still ess than replacing all our windows! Thanks so much for your help.

Regards,
Russ
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