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How fast can you change a fan belt?


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  I have a 1974 MCI bus that you can safely change the fan (blower) belt without tools with the engine running.

 The upper pulley is tensioned with an air cylinder. when you shut off the air with the handy valve, the pulley lowers and slacks off the belt.

 You can then lift it off and instal a new one.

 Not quite 5 seconds but definitely in less than a minute.    👨‍🔧👍

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