Hurd casement window parts: dual arm casement operator, crank, cover

Thanks for your post! Your window operator can either be replaced with either the 39-253LB or the 39-438B Encore Dual Arm Operators. To determine which of these is the correct replacement, you'll need to compare the attachments used with the operators. Take a look at the tutorial below for a detailed explanation.

The compatible hardware and accessories (for each respective operator) can be found in their related products on the website.