Any Special Magic to tighten the Fan Belt?

Discussion in '1947-1954' started by mockoski, Jul 23, 2018.

  1. mockoski

    mockoski Member

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    I noticed that when I grab the Fan to try to turn the engine, the belt doesn't' move and the fan pulley just spins..

    I suspect the belt is loose and needs to be tightened, but not exactly sure how to do this.

    Anyone have have a tip?
     
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  2. coilover

    coilover Member

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    Is it a generator or alternator? If a generator tighten belt till there is 1.5" of travel or .75 each direction. If an alternator tighten to where plucking the belt gives a "C" sharp.
     
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  3. mockoski

    mockoski Member

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    Thank you sir, yes it is a Generator.
     
  4. vwnate1

    vwnate1 Member

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    You need to loosen not only the adjuster pinch bolt on the top front ear of the generator but the lower two bolts holding the generator to it's bracket .

    Don't forget to re tighten them all ! .

    It doesn't need to be very tight .
     
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  5. mockoski

    mockoski Member

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    Thank you Nate..

     
  6. vwnate1

    vwnate1 Member

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    FWIW, you should be able to turn the generator's fan by hand with difficulty ~ if the belt is new and clean enough it might well squeak when you do so .

    Too tight will cause generator bearing failure, another thing you can fix at home .
    pushing with your thumb in the center or the longest run of the belt bewtween pulleys should yield a 1/2" deflection .

    Remember : the age of the belt has much to do with how much it flexes as does having the same size pulley sheaves on all three pulleys, not a given thing after 50 + years .
     

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