How to Troubleshoot & Replace Whirlpool AP6012991 / WP8537434 Cam Assembly (Dishwasher)

My husband researched the problem and purchased a lid switch, timer,cam assembly, and a whirlpool direct drive washer motor coupling to rule out every possible problem. The machine was used when we received it over 10 years ago. It works better than ever. Fair disclosure, my husband is in the maintenance field. 

With repair kit 

Pulled the top of the agitator off and removed the dust shield beneath. Removed the bolt holding the agitator in place and pulled it up and out. The dogs that were supposed to turn the agitator were worn away. Ordered the Cam-Agit and installed it. Everything works like it is supposed too. Easy fix.