How to install? 39-147

Hey, Mel. Installing these cranks are actually pretty easy. The hardest part is having to remove the wooden trim covering the old one. I recommend using a thin chisel or pry bar. Just be very careful not to break the wood! Once that trim is off, it's a simple matter of unscrewing the old one and screwing in the new one.

Not sure what that could be. There are two possibilities. Either the operator you chose was incorrect, or there is something obstructing the casement window.

First, uninstall the operator completely and try to open and close the window manually. If it binds up, then there is something in the way. If it works fine, however, then there is a problem with the operator. Carefully compare it to your original to make sure that all the dimensions match, especially for the arms.