Twist screw on window casement part is loose

A quick learner from IL says:
June 14, 2019
Need some help with replacement parts for older windows with openers. The twist screw that the handle attaches to is loose and does not stay in place...will not engage the wheels to open the window. I have several pictures attached that show the screw on the inside and the arms on the outside. are there replacement parts available that have the double arm or is there an equivalent piece that we can use?
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Tom from SWISCO responded:
June 18, 2019

Yep, sounds like the worm gear has stripped out. You'll need an all new operator.

Based on your photos, I would start by looking at our 39-031. It looks like you have a similar dual-arm operator, but I highly recommend reviewing our dimensions to confirm. Otherwise, this should be fully compatible with your old cover and handle. See our 39-032 for the opposite side.

Dimensions for 39-031
Dimensions for 39-031
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-031
$29.70
Truth Hardware Entrygard Dyad Window Operator
Truth Hardware Entrygard Dyad Window Operator
39-036
$32.30
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