I replaced the retractable motor and gear box. Now it appears that the linkage is to long for the arm to make contact with the twelve o'clock micro switch. The arm makes perfect contact with the six o'clock miro switch. The motor arm moves from the six position to the 10 position and seems to top out or bind. I measure 5" of travel when it stops. I operated the hood up and down by hand and can not find any reason for the stoppage. Can you help? any Ideas? Thanks Norm.