Cranks

Hello,

I would recommend starting by comparing the specifications of the 39-253RB, along with the rest of the related hardware, to your assembly. These operators are used with the 39-529 track slider at the end of the long arm.

Dimensions for 39-253RB

Alternate image for 39-529

Alternate view with measurements

Also, look over the 39-528 track to confirm if you can install this type on the sash of the window. Take a look at the parts and related videos to see if this could work for your window. Thank you.