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FAN & MOTOR MAINTENANCE INSTRUCTIONS
GENERAL MAINTENANCE:
1. 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 - shaft must not be cocked in the bearings. Misalignment can cause overheating, wear to
dust seals, bearing failure, and unbalance.
3. Hardware - check tightness of all bolts and set screws.
4. Lubrication - check fan and motor bearings and add lubricant if necessary. Be careful not to over-
grease as this can damage bearing seals.
5. Airflow - make sure there are no obstructions to airflow in outlet or inlet ductwork.
6. Bearings - Bearings on high-speed fans 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.
Ball pillow blocks can have total running temperature of 165
o
F (74
o
C) before the cause of overheating
should be investigated.
7. Fan wheels - inspect wheel blades for accumulation of dust and dirt. Clean thoroughly with stream of
water jet, compressed air or a wire brush. This will help prevent an unbalanced condition. If blades are
aluminum, be careful not to damage them. Cover the bearings so water won't enter the pillow block.
The wheel should be centered to prevent the blades from striking the housing. Make sure wheel is
rotating in the proper direction. Never run the fan at a higher speed than it was designed for unless you
check with Bry-Air, Inc. first.
