Replace operator for kitchen vinyl windows.

Thanks for posting. I am pretty confident we can replace this casement operator, but it looks like the link arm is missing on this one. Is there an undamaged version you can show us, with the link arm still intact? From there, we'll do our best to narrow down what you need. Thanks.

Hi Arnie. I certainly see the arms for a casement window hinge, but these arms are not the same arms that connect to the operator on the window sill. The casement window hinges not connected to the operator: they connect the window sill to the casement window, and they are essentially what guide and support the window sash during its opening and closing. But the arm I'm speaking of should be coming out of the back of the operator and connects to that stud bracket also in your photos, which looks like either the 39-513 and 39-514. The split arm on the casement operator is actually what 'pushes' the window open or 'pulls' it close. 

Take a look at our 39-090 or 39-188. These have the bodies of your operator, but also a so-called 'split-arm' that emerges from the back of it. This is what connects to that stud bracket in your photos. I believe you need something like one of these two operators, but you'll note there are slight differences in the shape of their split-arms. This difference affects compatibility, which is why seeing one with the arm still intact would be best. 

Hey Arnie, thanks for getting back to me with the arm. This definitely looks like the 39-188 to me; the shape of the gear-arm has a tell-tale 'W' shape. Let me know if you have any other questions.