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General Maintenance
1 Inspection - A definite time schedule for inspecting all rotating parts and
accessories should be established. The frequency of inspection depends on
the severity of operation and the locality. Inspections might be weekly at
first in order to set up the schedule.
2 Alignment - The shaft must not be cocked in the bearings. Misalignment
can cause overheating, wear to dust seals, bearing failure, and vibration.
3 Hardware - Check the tightness of all bolts and setscrews.
4 Lubrication - Check the fan and motor bearings and add lubricant if neces-
sary. Be careful not to over grease as this can damage bearing seals.
5 Air Flow - Make sure there is no debris or unnecessary obstructions to air-
flow in the outlet or inlet ductwork.
6 Bearings - On high-speed fans, the bearings tend to run hot. Therefore, do
not replace a bearing because it feels hot to the touch. Place a pyrometer or
contact thermometer against the pillow block and check the temperature.
Pillow block and flange mount bearings can have housing surface tempera-
tures of 200°F (93°C) before the cause of overheating should be investigated.
7 Wheel - Inspect the wheel blades for accumulation of dust and dirt. Clean
thoroughly with a stream of water jet, compressed air, or a wire brush. This
will help prevent an unbalanced condition. If the blades are aluminum, be
careful not to damage them. Cover the bearings so water does not enter the
pillow block. The wheel should have proper clearances to prevent the blades
from striking the housing. Make sure the wheel is rotating in the proper
direction. Never run the fan at a higher speed or temperature than is shown
on the fan nameplate. Contact Conair with any questions.
Addendum l AD-7
CAUTION: Wear eye protection. If you use compressed air to clean the equip-
ment, you must wear eye protection and observe all OSHA and other safety
regula
tions pertaining to the use of compressed air.