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What is/are the reasons why a fan belt of a belt-driven motor easily broken often times?

fan belts do not last for at least1 or2 months and easily breaks with some unusual wear marks both sides.

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Question added by Tom Escosa , HVAC Engineer , ADNOC
Date Posted: 2014/01/26
Adham Salm
by Adham Salm , Maintenance Director – KSA , CHBIB Trading Company

There are many causes of belt failure :

> [ Misalignment ]

Like pulley misalignment will cause the belt to rub. This rubbing will generate heat that the belt is not designed to deal with, causing weakening and then failure.

> [ Excess tension and Excess slack ]

Too much tension and the belt will stretch beyond tolerance.Not enough tension, and the belt will snap tight each time the engine is started, causing weakening and then failure.

> [ Primary drive pulley bearing failure ]

> [ Damaged or rough pulleys surface ]

> [ Incorrect belt installation ]

> [ Wrong belt size ]

> [ Idle rpm too high ]

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