Installation - Leigh UV metal bifold doors

Thanks for writing in. Sorry to hear you're having trouble finding the right parts for these Leigh doors. There is a limited inventory for Leigh parts, the tracks in particular, because Leigh discontinued these doors in the last century. For the 5' opening, you will need two 21-402 tracks, one for the top and one for the bottom. Use the 21-002 for the bottom pivot pin, as well as three 21-007 spring loaded pins. While the nylinders you purchased (the 21-150) work with the 21-002 adjusting pin, the 21-007 actually comes with a nylon sleeve, so nylinders won't be necessary. You will use one 21-007 pin for the top pivot and the other two for the top and bottom guide pins. Let us know if that all makes sense, or if you have further questions. 

The 21-402 track comes with a sliding bracket that directly connects to the pin. The top nylon guide fits snugly into that bracket and keeps the pin and door in place during operation. We actually have a video that shows how most of this hardware works that you may find helpful. I'll share it below.

I'm sorry to hear that you're having trouble. It sounds like the major problem here is with the raised floor. If this was a modification someone made after the doors were installed, which is likely, then there may not be much you can do in this situation. The simple answer is that these bifold doors weren't meant to operate in this kind of application.

Like you already pointed out, you can only raise the door so high to allow it clearance, but then you run into the issue of it not fitting to begin with. That's not really a problem with the hardware, nor is there any pin or bracket combination you could buy that would fix it. That's a problem with the uneven floor, which would eventually have to be addressed if you want this door working properly.

The way I see it, you would either need to fix the floor so that it's level, which would give your door the clearance it needs to function properly while still fitting in the opening. Or, you need to consider an all new door that would better suit this application. There is nothing that we sell that would allow you to circumnavigate this issue.