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17
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 efficient, 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 fitting 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.