BAC 3240C - Fan Motors; Fan Shaft Bearings

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Detailed Component
Maintenance
Procedures
Fan Drive System
Optional Gear Drive System
Fan Motors
Inspection & Maintenance
Adjustable Motor Base
Fan Shaft Bearings
Inspection & Maintenance
Fan Motors
Series3000CoolingTowersusecoolingtowerduty,premiumefcient,totallyenclosed,
motor(s).
Inspection & Maintenance
• Cleantheoutsideofthemotoratleastquarterlytoensurepropermotorcooling.
• Afterprolongedshutdowns,checkthemotorinsulationwithaninsulationtesterprior
torestartingthemotor.
• Checkthemotorvoltageandcurrentfollowingstart-upandeverythreemonthswhile
inoperation.
Adjustable Motor Base
Coatthemotorbaseslidesandadjustingscrewspriortostart-up,everythreemonthswhile
inoperation,andfollowingshutdown.Usegoodqualitycorrosioninhibitinggreasesuchas
oneofthoserecommendedforlubricatingthefanshaftbearingsonpage 17.
Fan Shaft Bearings
Twopillowblockballbearingssupportthefanshaft.Eachbearingisequippedwitha
lubricationttingandaslinger/lockingcollartokeepoutmoisture.
Inspection & Maintenance
• OnlylubricatethebearingswithamanualgreasegunorBAC’soptionalAutomatic
BearingGreaser.Donotusehigh-pressuregreasegunssincetheymayrupturethe
bearingseals.
• Onlylubricatethebearingswithoneofthefollowingcompatiblewaterresistant
greaseswhicharesuitableforambienttemperaturesrangingfrom-65ºF(-53.9ºC)to
+250ºF(121.1ºC).
– Amoco-RyconPremium#3
– Chevron-SRI
– Citgo-PolyureaMP2™
– Conoco-Polyurea2™
– Exxon-Polyrex
®
EM
– Exxon-UnirexN™
– MobilGrease
®
-AW2
– Shell-AlvaniaRL3™
– Shell-Alvania#3
– Shell-Dolium“R”
– SKF-LGHP2™
– Unocal76-UnilifeGrease™
ATTENTION: Check to ensure the
controls for the fan motor are set
to allow a maximum of six on-off
cycles per hour to prevent motor
overload.
NOTE: Gear oils containing extreme
pressure (EP) additives are not
recommended, and should never be
used on cooling towers with gear
drives.
NOTE: For programming, operation,
and trouble shooting of the greaser,
consult the user manual shipped
with the greaser. This manual is
also available through your local
BAC Representative.