Re: Hauling Dirt out of my basement (present day)
Yes, the slip ring that connects the track motors to the house. I put a brass washer under the copper tabs so the tabs press a little harder on the ring... and with the grease added, maybe I never have to take it apart again. 
This 850 is my all time favorite model to run. 
http://www.youtube.com/watch?v=n7uZQRGZN2A
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