upper and lower arm not spinning\ not cleaning properly

After inspection I found the rubber seals on the feed tube for the upper rack to be worn. At that point I thought that was it. I ordered the feed tube assembly the upper rack seal and the lower spray arm support hub as the bottom of the existing hub was worn. Installed all parts and same issue. Researched again on parts select and checked food chopper and it was clogged and broke off. Ordered and it works great. About 100.00 for parts and total time 1 to 1.5 hours as I worked on it three times. Down time about one week. This model is a Whirlpool Superba with the closest replacement about 1000.00 Thanks PART SELECT