I have not been on this web site for couple weeks, but as I started reading this thread, I guessed you had bad lower rotor bearing by way you described noise. Is good idea to replace both bearings when doing that repair. And replacing drive belt is also cheap insurance. Unfortunately, steel on aluminum causes bolts to feeze up and break, esp. in areas high in road salt usage. And disconnecting a.c. wiring and conduit is usually done at connection box, not at generator, but your particular unit may not have been easier to do that way. Congrats on your successful repair.