My traco window falls when opened

Thanks for reaching out! Based on the issue you are having with the sash, it is likely you'll need to replace the coil balance assemblies. To determine the exact replacement, I'll need to see a clear photo of the assembly, preferably removed from the window channel. You'll also need to remove it to confirm the stamps/markings from the coil balance springs; this will determine the spring strength needed to support the weight of your sash.

There is a chance you may also need to replace the sash pivot bar installed at the bottom corners of the sash.

In regard to the tilt latch at the top corner of the sash, I believe you can use the 26-243 and 26-244. To determine if these would work as a suitable replacement, carefully look over the dimensions shown below.

Alternate view of 26-243

Profile view of 26-243

Thanks for the photo. Your coil balance housing looks similar to our 15-087 Coil Housing Pivot and the part attached to the top appears to be the 15-086 Tandem Coil Housing. To confirm that these are the right fit for your window track, be sure to carefully review and compare the dimesnions.

Detail of 15-087

Detail of 15-086

These coil housings are both compatible with the Series 180 Coil Balance. To confirm the coils you need, check for any stamps/markings on the coils. If there aren't any, you'll need to obtain the exact weight of your sash and divide that number but four (the number of coils in the assembly).