Adjust 23-028 Mirror Door Roller

A home owner from Black Hawk, Co says:
I just purchased 4 Mirror Door Rollers from Swisco...the onesthat are currently on the doors do not "adjust" up or down when I turn the adjustment bolt. I believe that the center hole where the bolt screws into the top of the "wheel housing" is supposed to be threaded...all four of mine are stripped.

How do I "adjust" the new rollers?

Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting, Gene. Our 23-028 mirror door roller is adjusted in much the same way as your original hardware. However, our adjustment screw is tightened with a washer, rather than a threaded hole in the housing itself.
A quick learner from Black Hawk Co says:

Thanks for your quick response...all four of my originals are stripped and I was never able to adjust them...I'll check out the new ones when I get them and if i've got any questions it seems that I've come to the right place.

Thanks again,

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