We have a 750 KW Ring Granulator Crusher. The Crusher was undergoing heavy vibration. It was discovered that the ND Bearing radial clearance had increased abnormally. The bearing was replaced and the machine was put into operation. At no load the following vibration readings were taken in mm/sec:
However when the machine was run under load the following readings were taken:
What is the probable cause of this sudden increase in vibration in the axial direction when Machine was run under load.