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Check Rotation (Open-Drive Motor)
Open Drive Motor Initial Start-Up
Initial Uncoupled Start-Up
The initial start-up of the motor should be made with the motor uncoupled. Verify that oil has
been added to each bearing housing to the correct level.
1.
If the motor is equipped with unidirectional fans (refer to the certified drawing) and
verification of rotation direction is required, the following procedure should be followed:
a.
Start the motor and observe the rotation direction.
b.
Allow the motor to achieve full speed before disconnecting it from the power source.
c.
If the rotation direction must be changed, refer to the Before Initial Start-Up, Open Drive
Motor Electrical Connection section. Otherwise, the motor can be restarted immediately
after it has coasted to a stop.
2.
Following the initial start-up, the bearing temperatures should be closely monitored. On
sleeve bearings, the free rotation of the oil rings should be verified by observing them
through the viewing port in the top of the housing. The rate of rise in bearing temperature is
more indicative of impending trouble than the actual temperature. If the rate of rise in
temperature is excessive or if the motor exhibits excessive vibration or noise, it should be
shut down immediately and a thorough investigation made as to the cause before it is
operated again.