Check belt condition and tightness.

   Check belt for damage, spalling, bearing manufacturer before the break, there will be slipping sound of the belt surface will be cracked cracks, wear and spalling and other precursory phenomena. Therefore, should be carefully observed, such as the above phenomenon should be replaced belt (note the difference: the belt tightness is not enough, there will be slipping sound). Check the fan belt tightness, with the thumb to 9-10kg of force when pressing the middle of the belt, the deflection should be 5-1Omm. If you do not meet the requirements, should be adjusted.