Older metal bifold doors

A home owner from BRITISH COLUMBIA says:
We have older metal doors throughout the house and they all seem to have the same problem. The bottom sticks on the track unless you hold the door up while closing. I read that the pin is adjustable but can't see how. See photos. It is the bottom pivot pin
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Bob from SWISCO responded:

Thanks for writing in, and apologies for the delay. You can use a slotted screwdriver to adjust the pin to your desired height. See the video below for details. 

A home owner from USA says:
Not needing any info, except for do you know anything about theses doors I have 5. Bought from a person tearing dn a house. Thanks
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Tom from SWISCO responded:

I'm sorry to say that I don't recognize these doors and can't tell you anything in general. Just seeing the door itself is unfortunately not enough information to go by.

I am sorry for the inconvenience.

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