Bell & Gossett P81673 REV I Series 1510 - Manual (Page 29)

Maintenance
Bearing maintenance
Bearing lubrication schedule
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
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 that the grease container, the greasing device, and the fittings are clean.
Failure to do this 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 an 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°C) and for lithium-based grease
180°F (82°C).
Lubricating grease requirements
NOTICE:
• Never mix greases of different consistencies (NLGI 1 or 3 with NLGI 2) or with different
thickeners. For example, never mix a 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.
Maintenance
Series 1510 Installation, Operation, and Maintenance Manual 27