What crank mechanism will repair my Semco window?

Good morning, Micca! I'm familiar with this type of operator, so I'll do my best to help you out. 

There are actually quite a few different operators that have this same style base. The only difference between them all is the design of the arms. I can't quite make yours out, but from what I can see in that fourth photo I would wager that your operator is close to our  39-031. Review our dimensions below to verify how those arm sizes match up to your original hardware. We also sell the 39-032 for the opposite side.

Dimensions for 39-031

I'm afraid that the only way to remove the operator shown in the pictures above is to pry up the wood trim. That's the only way to access the screws that fasten the operator to the sill.

Fortunately, we have a video that shows you exactly how this can be done, step-by-step. See the video below for more information. Just make sure to be careful prying the trim up, since you don't want to crack the wood on accident.

Hey there! I feel confident that we can supply this operator to you, but we'll need to see more of the part in question before we can suggest a match. What you show here is only the base, which is a necessary detail, but in addition to that we'll need to see the arm (or arms) that connect to the sash.

Please let me know if that's possible and we can work from there!

These photos are perfect, thanks! I have a couple different operators for you that may match depending on the length of the arm. Take a look at our 39-013 and 39-014, 39-254E and 39-255E, and finally the 39-027E and 39-028E operators. Compare our dimensions to yours and see if any match what you need.

Dimensions for 39-013

Alternate image for 39-254E

Dimensions for 39-027e

Thanks for reaching out to us, David. There won't be a part number printed on your operator, unfortunately. There are codes on the base and arms, but these aren't specific product IDs; any given number is frequently associated with multiple different products, since a lot of these Truth parts share components. The only reliable way to ID these is to go by its physical design.

Based on these images, you appear to have a Truth brand operator with a centered spline. We sell a ton of different operators that have this same exact base, so I'm very confident we sell a good match for you, but all differ in terms of how their arms are configured.

If you can show us a clear picture of the entire operator mechanism removed from the window, we can find you a match. Please let me know if you can get that to me and we can work from there!