Bell & Gossett P81630F Series VSCS Base Mounted Centrifugal Pumps - Manual (Page 6)

6
SPECIFICATIONS – GREASE TYPES
Polyurea-based greases Lithium-based greases, NLGI 2
Pumps built on or after Dec 1, 2014 use Polyurea-based greases.
See date code label and lubrication label on pump or bearing
frame indicating polyurea-base grease
Pumps built before Dec 1, 2014 were built with Lithium-based
greases, NLGI 2, and do not have lubrication label on pump or
bearing frame indicating pump grease type
ExxonMobil Polyrex™ EM Shell Gadus® S2 V100 2 (was Alvania® RL 2)
Chevron SRI NLGI 2 Chevron Multifak® EP 2
Shell Gadus® S5 T100 2 ExxonMobil Unirex™ N2
LUBRICATING GREASE REQUIREMENTS
NOTICE:
• Never mix grease of different consistencies (NLGI 1 or 3
with NLGI 2) or with different thickeners. For example,
never mix lithium-based grease with a polyurea-based
grease. This can result in decreased performance.
• Remove the bearings and old grease if you need to change
the grease type or consistency. Failure to do so can result
in equipment damage or decreased performance.
Type of
bearing
First lubrication,
assembled
pumps and
replacement
bearing frames
First
lubrication,
replacement
bearings
Lubrication interval,
pump, polyurea-based
grease, operating hours
Grease-
lubricated
bearings Not applicable,
lubricated before
shipment Hand pack
bearings before
pressing on
the shaft. After
bearing frame
assembly,
follow relube
instructions to
lube bearings. • 3600 hours, 2 pole
• 7200 hours, 4 pole
• 50% for severe
conditions: dirty, wet
and/or above 100°F
(38°C) ambient
• 50% for bearing frame
temperature above
180°F (82°C)
• 75% for lithium-based
grease
BEARING MAINTENANCE
BEARING LUBRICATION SCHEDULE
REGREASE THE GREASE-LUBRICATED BEARINGS
It is important to lubricate pumps and motors that require regreasing
with the proper grease. See the motor service instructions and
nameplate for motor regreasing information. Pumps are to be
regreased using the grease types listed below or approved equal.
Always keep pump and motor properly lubricated.
NOTICE:
Make sure the grease container, the greasing device, and the
fittings are clean. Failure to do so can result in impurities entering
the bearing housing when you regrease the bearings.
1. With fully enclosed coupling guards, regrease pump while
pump is running.
a. With old style open ended guards, stop pump, re-grease,
and hand turn shaft before re-starting.
2. Wipe dirt from the grease fittings before greasing.
3. Fill both of the grease cavities through the fittings with the
recommended grease. Stop when grease leaks out at shaft.
4. If needed, stop pump and wipe off excess grease.
5. Restart pump.
The bearing temperature usually rises after you regrease due
to excess supply of grease. Temperatures return to normal in
about two to four operating hours as the pump runs and purges
the excess grease from the bearings. Maximum normal bearing
housing temperature for polyurea-based grease is 225°F
(107°F) and for lithium-based grease 180°F (82°C).