Imbalance in Vertically Mounted Machines
Vertical machines, such as pumps, are usually cantilevered from their foundation, and they usually show maximum 1X levels at the free end of the motor regardless of where the vibration source is. To isolate motor imbalance from pump imbalance, it may be necessary to break the coupling and run the motor solo while measuring 1X. If the 1X level is still high the problem is the motor; otherwise it is the pump.
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