Bi-fold Door Parts

A home owner from USA says:

I am at my wits end with my bifold doors from the 70s.

I bought these replacements parts, hoping they would solve the problem, but even though everything fits, the door is still grinding on the track instead of gliding.

Is there something I am doing wrong? Attached are photos of the bottom pivot and the bottom guide pin. Along with a photo of how the door sits right on the track. It grinds and makes an awful sound when we try to use the door. Is there another part I neglected to buy?

I feel like I must he missing something simple.

Any help would be appreciated.
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Paul from SWISCO responded:

I recommend that you reverse your pins. The threaded 21-001 goes in the bottom corner of the door into the pivot bracket of the track. You want to loosen the 21-154 rod clamp and turn the threaded pin to raise and square up the door, then tighten the 21-154 rod clamp. The spring loaded 21-007 guide pin is used to guide the door along the track as you open and close the door. Hopefully this information helps.

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