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BLOWER BEARINGS
Bearings must be checked during each periodic maintenance inspection. Bolts and set screws
should be checked for tightness and the bearings may need lubrication.
Refer to website for specific
manufacturer cut sheets pertaining to bearing maintenance.
Bearing Lubricate:
Any good quality lithium or lithium complex base grease using mineral oil
conforming to NLGI grade 2 consistency and an oil viscosity of 455-1135 SUS at 100˚F (100-250 cSt
at 40˚C) may be used for re-lubrication.(Only applicable if unit blower bearings are Browning AH(Air
Handler))
IMPORTANT: The following table is intended only as a guide to aid you in
setting up your own schedule.
LUBRICATION GUIDE FOR BLOWER BEARINGS
MOTOR BEARINGS
Motor bearings in a clean environment should be lubricated every 2 to 3 years. Under more
severe conditions of dirt or moisture, lubrication may be required every 6 months to 1 year.
Refer to
website for specific manufacturer cut sheets pertaining to motor bearing maintenance.
Typical motor bearing lubrication procedure follows:
Remove fill and drain plugs.
Clean drain port of hard grease (with wire if necessary).
Add grease (cavity should be no more than ½ full.).
Start motor and let run for 10 minutes.
Wipe off any drained grease and replace fill and drain plugs.
IMPORTANT: Avoid adding an excessive amount of grease since this a
common cause of motor failure.
BLOWER WHEEL
Ensure that blower hub is securely fastened to shaft. Inspect blower wheel and blades for signs
of damage or cracks. Clean blades if necessary to maintain proper balance and performance.
Avoid use of excessive grease on blower bearings that can coat fan blades and attract dirt.
Operating Conditions
Bearing Temp. (˚F)
Grease Interval
Clean
32 – 120
6 – 10 ,months
120 – 150
1 – 3 months
150 – 200
1 – 4 weeks
32 – 150
1 – 4 weeks
Dirty
150 – 200
Daily – 1 week
Moisture
32 - 200
Daily – 1 week
