REYMSA COOLING TOWERS, INC.
www.reymsa.com
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Inspection:
1. Remove the fan guard to obtain access to the fan assemble and motor. With the guard removed turn
the fan blades by hand to ensure that it moves freely and there are no indications of mechanical
problems with the motor or scraping of the fan blades against the side of the fan duct.
2. Replace the fan guard and return to ground/roof level.
Preventive maintenance (fan motor):
It is recommended to do general maintenance to the fan motor after 36 months of start-up, or before if
its required, including change or bearing lubrication. Maintenance should be performed only by qualified
personnel.
1. Remove the fan guard on top of the cylindrical air discharge to gain access to the motor.
2. Remove the stainless steel plate on top of the fan hub by removing the (3) hex screws.
3. Once the plate has been removed; remove the (3) hex screws that holds the bushing to the hub. Note:
The bolts that are being removed in this step use the non-threaded holes of the bushing. (The bushing
threaded holes are empty.)
4. The bolts, that were removed, need to be screwed into the adjacent threaded holes of the bushing.
Tighten the bolts following a clockwise sequence; this will push the hub-airfoil assembly out of the
bushing – releasing the hub-airfoil assembly from the bushing.
5. Remove the hub-airfoil assembly from the motor shaft.
6. Inspect the fan assemble to assure that there is no damage such as broken or loose fan blades.
7. In case of fan wheel vibration it will be necessary to have the fan dynamically balanced by a
qualified technician.
8. Gently remove any buildup from the fan blade with a plastic brush.
9. Disconnect electrical wiring and conduit to remove the motor.
10. Loosen the stainless steel bolts and nuts that connect the motor to the FRP motor support inside the
fan duct.
11. Support the weight of the motor using a lifting device.
12. Remove the connecting bolts while holding the motor steady.
13. Lower the motor to the ground.
14. Clean the outside surface of the motor to ensure proper motor cooling. Check the motor insulation at
a manufacturer’s authorized service station.
15. Reverse procedure to install fan and motor.
16. Replace the fan guard.
Do not proceed without disconnecting and locking out power for the motor and
pump. Failure to do so may result in personal injury or property damage.
CAUTION
Maintenance
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