the upper rack wheels had crumbled

the parts only took a few days to arrive, and it took me about 2 minutes to install them-no tools were required. i took out the end plugs from the slider bars, slipped out the old broken wheel parts, snapped on the new ones, slid the upper rack into the slider assembly, popped the end plugs back into place and VOILA!!

aside from the expense of the parts- much better to go this route rather than hire a repair guy to do it!!