Wheel Arm Replacement

Question

I'm needing to replace the wheel on the arm that goes into the window track because it always falls out when I open it. Unfortunately I don't see any part numbers on it.

Tom · Accepted Answer

It's difficult to make out what operator you have while it's still installed. Based on the general style, and especially the offset in the arm, I think this might be an older version of the 39-412. Carefully review its specs and design and see how well they compare.

I strongly recommend removing your old operator for the sake of comparison. I wouldn't buy anything unless you know for sure the details match up. The only thing that should be different is the shape of the base; everything else should be the same.

Alternate image for 39-412

Alternate view of 39-412