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3. Any abnormal noise or vibration should be immediately investigated and corrected.
Increased vibration (with the motor uncoupled from its load) can be indicative of a change in
balance due to a mechanical failure or the loosening of a rotor part, a stator winding
problem, foundation problem, or a change in motor alignment.
4. Verify that the magnetic center indicator aligns with the shaft.
CAUTION
CAUTION
!
When the rate of bearing temperature rise is less than 2° F (1.1° C) per half-hour,
the bearing temperature is considered to be stabilized.
CAUTION
CAUTION
!
If the total bearing temperature exceeds 195 F (91 C), the motor should be shut
down immediately.