window operator

Thanks for posting. Yes, when the gear the handle connects to breaks down, the entire operator should be replaced. It looks like you have either the 39-031 and 39-032 dual-arm assembly, or the 39-155 and 39-156. The difference between these two sets of operators is the length of the link arm, as shown in the diagrams below. Compare both with your old mechanism to determine which set matches what you need. In either case, for new handles and covers, go with the 39-114L and 39-107 sold separately.

Dimensions for 39-031

Dimensions for 39-155