The nut that holds the lower spray arm on is pretty corroded. Is the threaded rod that is attached to connected to the motor? Does the threaded rod unscrew? Any advice?
Answer Don, the metal shaft that holds the spray arm assembly is part of the Diffuser 154367402 and the spray arm nut is 154234301. The diffuser mounts to the pump cover with 4 screws, remove the spray arm, remove the four screws, carefully, and reverse the procedure.