Dave Sr. from SWISCO responded:
August 8, 2016
Thanks for posting. Looking at the wheel in your photos, it appears that could have been concave with one side having worn down. Could you confirm? If so, see our 81-236 wheel with the 81-310 axle kit. That may work. If not, is there any way to see the housing out of the door? That may help us find something better.
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