Need replacement cranks

Thanks for posting. This might be the 39-013 and 39-014 Straight Arm Operator. Just make sure the length of the straight arm matches what is shown below. Let me know if it differs.

Dimensions for 39-014

For a new crank handle, see the 39-114L. For new tracks, see either the 39-505 or 39-507. If you need new window hinges, see if the 10" 36-004-10 matches what you have. Let me know if you have any questions about any of this hardware.

DImensions for 36-004-10