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14
Fan Motors
Inspection & Maintenance
• Clean the outside of the motor at least quarterly to ensure proper motor cooling.
• After prolonged shutdowns, check the motor insulation with an insulation tester prior
to restarting the motor.
• Check the motor voltage and current following start-up and every three months while in
operation.
Adjustable Motor Base (BALTIDRIVE
®
Power Train Only)
Coat the motor base slides and adjusting screws (refer to Figures 4a and 4b on page 13)
prior to start-up, every three months while in operation, and following shutdown. Use good
quality, corrosion inhibiting grease such as one of those recommended for lubricating the
fan shaft bearings on page 15, or Anti-Seize (BAC part # 160069).
• Drive alignment check and adjustment:
– Check the drive alignment annually to ensure maximum belt life.
– Place a straight edge across the driver and the driven sheaves as shown in Figure 5.
– There should be no more than 1/16” deviation from the four points of contact with
the straight edge, as shown in Figure 5.
– In case of realignment, loosen the driver sheave, and align it with the driven sheave.
Allow 1/4” for draw-up as the bushing screws are retightened.
Figure 5. Drive Alignment
NOTICE: Ensure the controls for
the fan motor are set to allow a
maximum of six on-off cycles per
hour to prevent motor overload.
NOTE: See page 12 for fan motor
types.
DANGER: Rotating equipment
will cause severe personal injury
or death to persons who come in
contact. Do not perform any service,
maintenance or inspection on or
near the fans, motors, and drives,
or inside the unit without first
ensuring that the fan and pump
motors are disconnected, locked
out, and tagged out.
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