the cracking mechanism probably need to be replace
Thanks for reaching out! The base from your window operator is similar to quite a few we have. I'm confident we can provide a replacement recommendation but I'll also need to see a photo of the operator arm(s) to determine a replacement. You may need to open/close the window manually to obtain the photos.
Please let me know if you have any additional questions.
Thanks for the additional photos. Your window operator is likely to be a match for the 39-032 EntryGard Dual Arm Operator. To confirm that that this is the correct replacement match, carefully look over the specifications and compare them.
The opposite versions can be found tagged below, along with the other compatible hardware and accessories.