casement window operator RH spline

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Quick Learner from Hillsborough,NJ

Feb 1, 2026 12:37 am

casement window operator RH spline. Cover broken. Handle is good. Need to change operator

2 user uploaded images

10 Replies

Bob from SWISCO

Feb 1, 2026 11:38 am

Hello there. Can you show us the entire operator, including the arm(s) that move the window? A bird's eye view, either with the operator removed from the window or at least with the window open, would suffice. We'll do our best to help from there.

Quick Learner from Hillsborough,NJ

Feb 3, 2026 9:18 am

Could be like the followings ( truth split arm)?

SWISCO:39-319(Truth Split-Arm RH)
? Amazon:Prime-Line U 9972(RH)

4 user uploaded images

Quick Learner from Hillsborough,NJ

Feb 3, 2026 9:30 am

Crank RH, window open left?

Bob from SWISCO

Feb 3, 2026 3:30 pm

Thanks. This is an old GU Operator that is no longer made, but our 39-316 Dyad Operator may be able to replace it. See below. For a handle that works with the new operator, see the 39-114L.

Quick Learner from Hillsborough,NJ

Feb 3, 2026 8:03 pm

Thanks. My old handle is good. Can I use it with replaced operator?

Quick Learner from Hillsborough,NJ

Feb 3, 2026 8:56 pm

Thanks again! Is this for left open window?

Bob from SWISCO

Feb 4, 2026 4:07 pm

It's tough to say with your old handle. it looks like the worm gear popped out with it, so you'd need to remove that from the handle if possible. If it is mean to fit an 11/32" diameter spline, then it will the old operator.

The handedness of the 39-316 is determined by what side of the gear box the handle attaches to. As you can see, it fits to the right side of the gear box, which is the same as your old setup.

Quick Learner from Hillsborough,NJ

Feb 4, 2026 5:50 pm

Thx!! I placed the order. The video you sent seems very helpful. Let's see what happens. BR

Bob from SWISCO

Feb 5, 2026 12:17 pm

Please let us know how you make out, or if you have further questions!