Dave Sr. from SWISCO responded:
May 18, 2016
It's hard to say. There are a lot of factors that go into it. Could you show me a picture of the window? Can you also show me a picture of the roller in question? That would be a huge help.
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Paul from SWISCO responded:
May 20, 2016
Thanks for getting back to us. The housing on the 87-141 Acorn roller is designed for one wheel that can be adjusted to the different slots, which in turns raises and lowers the sash. That may be the problem your window sash is having if it's dragging. In my experience, this is usually due to the 87-141 wheel being in the wrong slot. Check that out and see if it fixes your issue.
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