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    Adcase's Avatar
    Adcase Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Aug 30, 2013, 03:33 AM
    Fan blade keeps coming off motor shaft
    This is a roof top unit. The compressor cooling fan blade won't stay on motor shaft. I tighten the lock screw with a large crescent wrench and it keeps working its way off.
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Aug 30, 2013, 06:24 AM
    Are you making sure that the screw is on the flat spot of the shaft?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #3

    Aug 30, 2013, 07:20 AM
    Make sure on flat as HK said and use some RED Locktite
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #4

    Aug 30, 2013, 07:22 PM
    As previously stated, make sure the screw is on the flat of the shaft.

    The set screw threads may be worn. I wouldn't use red Locktite, blue maybe. If you use the red & you ever have to change the motor, the only way you will get the set screw out is with a torch.

    You might want to get a new set screw with a cupped point. Take the old one with you to your local hardware store.
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