BAC PT2 - Fan Shaft Bearings; Inspection & Maintenance

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Fan Shaft Bearings
Two pillow block ball bearings support the fan shaft and are provided with extended lube
lines as standard. 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 because 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 - Gadus S2 V100 3
– Shell - Gadus S3 T100 2
– SKF - LGHP2™
– Unocal 76 - Unilife Grease™
• Lubricate the bearings as follows:
– Initial Start-Up: Normally, no lubrication is required since the bearings have been
lubricated at the factory prior to shipment. However, if the unit has been stored at
the job site for more than three months, both bearings should be lubricated with
new grease before initial operation. When lubricating, purge the old grease from the
bearing by gradually adding grease until a bead of new grease appears at the seal on
the underside of the bearing.
– Seasonal Start-Up: Purge the bearings with new grease prior to start-up.
– Operation: Purge the bearings with new grease every three months while in
operation.
– Extended Shutdown: Purge the bearings with new grease prior to any prolonged
storage or downtime.
Detailed Component
Maintenance
Procedures
Fan Drive System
Inspection & Maintenance
Fan Motors
Inspection & Maintenance
Adjustable Motor Base
Fan Shaft Bearings
Inspection & Maintenance