Crank change

Thanks for posting. If it's the operator you need, see either our 39-253LB & 39-253RB or the 39-438B & 39-439B, depending on the appendage at the end of the straight arm. The video below explains more. However, based on your photo it appears what you need is a new window hinge set. See if our 36-004-10 matches what you need. Compare the dimensions with the diagrams below. See what you think. 

DImensions for 36-004-10