Routine Maintenance
CLCH-SVX009J-EN
73
Fan Bearing Lubrication
For belt-drive fans, the grease used in electric motor
bearings is usually not compatible with the grease used in
fan bearings. Never mix the two grease types! See
for
maximum grease capacity.
Note:
Lubricate the motor bearing according to the motor
manufacturer’s recommendations and use the
manufacturer-recommended grease. See
Bearing Lubrication” on page 73
.
•
Fan bearings without lubrication lines are sealed
bearings. Re-lubrication is not required.
•
Fan bearings equipped with lubrication lines should be
lubricated with a lithium-based grease that conforms
to NLGI No. 2 for consistency.
Motor Bearing Lubrication
Obtain an operation and maintenance manual from the
motor manufacturer for the specific motor installed. The
motor manufacturer’s recommendations take precedence
for all matters related to the start-up and routine
maintenance of the motor.
Motor grease fittings have been removed from factory-
installed motors in compliance with UL regulations. Motor
bearings require periodic maintenance throughout their
life. Many different styles of motors come as standard
selections, so please obtain the motor IOM and use the
manufacturer-recommended grease.
Fan Motor Inspection
Inspect fan motors periodically for excessive vibration or
temperature. Operating conditions will vary the frequency
of inspection and lubrication. Motor lubrication
instructions are on the motor tag or nameplate. If for some
reason these instructions are not available, contact the
motor manufacturer. Some motor manufacturers may not
provide oil tubes on motors with permanently sealed
bearings.
Outside Air Intake Hoods
OA hoods are now equipped with a mesh-type moisture
eliminator. This eliminator may require periodic cleaning
to remove, pollen, dirt, and debris. Use vacuum and/or soft
bristle brush to clean bulky debris off exterior of
eliminator. Use a garden hose or pressure washer from
inside the unit, spray water toward the outside surface of
the eliminator. The spray should penetrate through the
eliminator completely.
NOTICE
Bearing Failure!
Mixing grease within the bearing could result in
premature bearing failure. Do not mix greases with
different bases within the bearing.
Table 20. Compatible greases
Type
Texaco Multi Fak 2
Shell Alvania 2
Mobil 532
Chevron Dura-Lith 2
Exxon Beacon
Keystone 84H
Table 21. Fan bearing maximum grease capacity
Shaft size (inches)
Capacity (fluid ounce)
1/2 - 3/4
1/7
7/8 - 1 3/16
3/8
1 1/4 - 1 1/2
5/8
1 11/16 - 1 15/16
7/8
2 - 2 7/16
1 1/4
2 1/2 - 2 15/16
2
