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Hi everyone,

I measure MCSA before motor maintenance. we changed new sleeve bearing, clean, spray insulation then heat stator. After finished I measure MCSA again. I see some different:

1. At 1X: The peak (0.0375dB - after maintenance) is higher the peak (0.0228dB peak  - before maintenance). I worry about unbalance rotor.

2. At 4.16Hz: the peak after maintenance decreased the peak before maintenance.

I need some recommendation from everyone.

Please see attached file

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