Product review (5 stars): Fixed the problem.
To be honest I wasn't sure if it was the radial bearing or seal ring that was causing my dishwasher problem so I bought them both!  They both cost very little compared to a service man coming out. They were easy to put in.  Just watch as you take the arm apart and put it  back in the correct order.  This is not hard and I certainly am no kind of handyman.  I tried to buy locally so I could fix the problem instantly; however, could not find them at Home Depot or Lowes.  I got both items from Amazon and they came in less than a week - fantastic. The Sears repair service wanted to come out and assess and then return to "correct" the problem.  This would have taken more than a month.  So I saved time and money by using Amazon. My Kenmore works find now and the dishes are clean.