SPX Cooling Technologies 07-1126 user manual Maintenance

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Maintenance

9––Worn output shaft bearing: this condition generates vibration on the tip path plane at a frequency equal to the rotor RPM.

10––The fan and/of the structure bolts are not tightened: in this case all the bolts have to be tightened.

11––The draining holes of the blades are obstructed: they have to be opened.

The amplitude of the fan vibrations is determined by the rigidity

Noteof its support. Vibration that would not be critical to a fan sup- ported by a sufficiently rigid structure is amplified by an overly flexible support. This support rigidity may also cause unexpected variations in the resonant frequencies of the blades.

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Contents Marley Ultra Low-Noise Fan Page Contents Storage General InformationDescription BalancingInstallation Installation InstructionsRotation and Flow Direction 10B 10A Ing bolt 17 missing or loose Installation Bolt Pillow Block Tightening Order Fan Diameter Bolt Bolt Torque Operation Prior to Start-UpPost Start-Up Operation Maintenance Maintenance and OperationTemperature Range Possible Causes of Vibration Maintenance Description Standard Material Protection Parts List10B 10A Troubleshooting Page M07-1126