bi fold metal doors

A quick learner from milwaukee says:
I have 3 buildings with these closet doors all I have are pins on top and bottom rubbing metal on metal and cant slide the doors. I see there are caps what is needed for the top pin and the bottom pin
User submitted a photo of bi-fold door hardware.
Profile picture of Paul
Paul from SWISCO responded:
It's hard to say exactly what you need without seeing the hardware in question. Leigh has used a bunch of different parts. Pre 1966, they were known to use 21-109 nylon guide. From 1966 to 1967, they used the 21-114, and from 1967-1979 they used the 21-108 nylon guide. Please compare our pictures and information to your own hardware to confirm if any of these would work.
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