It's not completely clear to me the process you've followed so far to narrow things down.
Have you wired a plug on a tail direct to the motor (cutting out the switch and microswitches) and turned on at the wall? Did it run? If not, the problem is motor or capacitor - check loose connections and change cap.
If it runs, then try just bypassing the switch so that the tails form the plug go direct to the output tabs that connect onward to the microswitches. If it runs, problem is switch. If not, problem is microswitches.