The bearing is indicating excessive axial loading for some reason.  It does not indicate the presence of excessive heat.  Is it possible, the lubricant was not correct or incorrect amount?  But that would indicate excessive heat.  This was not a manufacturing defect anything related to the bearing.  Could the bearing have possibly been cocked on the shaft?  I have seen that once before, where the bearing was not seated correctly against the shoulder of the journal.  Find the reason for axial loading and you will find the problem.

Johnny 5 posted:

The bearing is indicating excessive axial loading for some reason.  It does not indicate the presence of excessive heat.  Is it possible, the lubricant was not correct or incorrect amount?  But that would indicate excessive heat.  This was not a manufacturing defect anything related to the bearing.  Could the bearing have possibly been cocked on the shaft?  I have seen that once before, where the bearing was not seated correctly against the shoulder of the journal.  Find the reason for axial loading and you will find the problem.

Hey Thanks for reply.

I think your doubt about cocked bearing is absolutely right. Because there was spacer between bearing&housing in axial direction, which was out of position in small portion.(we observed it in disassembly). At that time I thought it occurred due to disassembly. Thank you for clarifying my confusion.