Bell & Gossett P15758C User Manual

INSTRUCTION MANUAL

P15758

REVISION C

234

BEARING MAINTENANCE

Bearing lubrication schedule

First lubrication,

Type of bearing

Grease-lubricated

bearings

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.

assembled pumps

and replacement

bearing frames

Not applicable,

lubricated before
shipment

Hand pack bearings before pressing
on the shaft. After bearing frame
assembly, follow relube instructions
to lube bearings.

First lubrication,

replacement bearings

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 lithium­based grease 180°F (82°C).

Lubrication interval, pump,

polyurea-based grease,

operating hours

• 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

NOTICE:

Make sure the grease container, the greasing device,

and the ttings 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 ttings before greasing.

3. Fill both of the grease cavities through the ttings

with the recommended grease. Stop when grease
leaks out at shaft.

4. If needed, stop pump and wipe o excess grease.

5. Restart pump.

Specications – 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

Lubricating grease requirements

NOTICE:

• Never mix grease of dierent consistencies (NLGI
1 or 3 with NLGI 2) or with dierent 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.

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

Xylem Inc.

8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.bellgossett.com

Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2014 Xylem Inc. P15758C October 2014