Crank and spindles

I am afraid that when the worm gear falls out, it means the entire operator has broken down and needs to be replaced. This looks like either the 39-031 & 39-032, or the 39-155 & 39-156, depending on the length of the link arm. For new covers and handles that work with both sets of operators I just mentioned, see the 39-114L and 39-107.