emptying the dust collection drawers. Failure to follow this
instruction may cause serious personal injury.
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FAN MOTOR LUBRICATION
The most common cause of premature bearing failure is improper lubrication. The fan
motor provided with AirWall dust collection systems will be one of two types.
One type has sealed-for-life bearings and requires no maintenance. The other type
motor provided with the fan has grease fittings on the top and bottom of the motor. If
safety permits, the initial lubrication may be done while the motor is running until some
purging occurs at the seals. Refer to the decal on the fan for the re-lubrication interval
for normal operating conditions. Hours of operation, temperature and environmental
conditions will affect the lubrication frequency. Adjust frequency depending on the
condition of the purged grease.
Lubricate the grease fittings with a high quality NLGI No. 2 or No. 3 multi-purpose ball
bearing grease having rust inhibitors and anti-oxidant additives. Suggested greases are:
Shell Alvania No. 2
Mobil Mobilith SCH 100
Texaco Premium RB2
American-Rykon Premium 2
Lubricate bearings prior to an extended shutdown or storage period. Rotate the motor
shaft monthly to prevent corrosion. If fans are to be shut down or stored for more than
30 days, it is important that the bearings are filled with grease and the fan rotated by
hand from time to time so that the grease can be spread on the bearing components.
TROUBLESHOOTING
The following is a list of possible problems and their causes that may occur on start-up,
or develop later during actual operation.
The following may cause noise:
a.
Impeller hitting the inlet of the fan or cutoff plate, loose impeller.
b.
Bad bearings are a common source of noise when defective, lacking
c.
lubricant or lubricant is dirty. Noise can also be caused when the bearings
are loose on the bearing support or the shaft, seals misaligned or fretting
corrosion occurs between the inner and outer bearing races.
c.
Bent or undersized shaft. If two (2) or more bearings are on the same
shaft, they must be carefully aligned.
