Routine Maintenance
CLCH-SVX009L-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 Table 20 for compatible
greases and Table 21 for maximum grease capacity.
Note: Lubricate the motor bearing according to the motor
manufacturer’s recommendations and use the
manufacturer-recommended grease. See “Motor
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
To Next Page