Response to Hello Dave.  Increasingly loud motor noise is the result of motor shaft bearing wear.  Attached please find 2 brief tutorials describing the process.  How To Replace the Bearings    How To Replace the Bearings - Part II   The front bearing is 5270-31   Bearing, 203 (Single) - 62032RS   The rear bearing is 5270-31   Bearing, 203 (Single) - 62032RS   Replacing the motor is the other option.  Century 1.5 HP Square Flange 56Y Up Rate Motor - B2854

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