I need the new whole assembly part

Hello,

Your operator is similar to the 39-172, depending on how the specifications below compare to yours. If the mounting bracket that attaches the arm to the sash is missing, we would need to see an intact backet form an identical window to compare to our inventory. 

Dimensions for 39-172

If you need new hinges, take a look and see how the 10" long base of the 36-048 set compares to yours. Thanks for posting! 

Detail of 36-048