Xylem P5002169B Series VSX VSH, VSC, AND VSCS - Manual (Page 22)

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MAINTENANCE
GENERAL MAINTENANCE AND PERIODIC
INSPECTION
Operating conditions vary so widely that to
recommend one schedule of preventative
maintenance for all centrifugal pumps is not
possible. Yet, some sort of regular inspection must
be planned and followed. We suggest a
permanent record be kept of the periodic
inspections and maintenance performed on your
pump. This recognition of maintenance
procedures will keep your pump in good working
condition, and prevent costly breakdowns.
One of the best rules to follow in the proper
maintenance of your centrifugal pump is to keep a
record of actual operating hours. Then, after a
predetermined period of operation has elapsed,
the pump should be given a thorough inspection.
The length of this operating period will vary with
different applications, and can only be determined
from experience. New equipment, however,
should be examined after a relatively short period
of operation. The next inspection period can be
lengthened somewhat. This system can be
followed until a maximum period of operation is
reached which should be considered the operating
schedule between inspections.
LUBRICATION
Pump Bearings
Bearing housings are packed with grease at
the factory and ordinarily will require no
attention before starting, provided the pump
has been stored in a clean, dry place prior to
its first operation. The bearings should be
watched for about an hour after the pump has
been started to see that they are operating
properly.
Periodic addition of grease is not required. If
the bearing brackets are removed for
maintenance reasons, thoroughly clean out
the bearing housing and ensure that it is
protected against dust and other
contaminants.
Reassemble the pump using new bearings
and lip seals. Use the grease fittings provided
on the underside of the bearing brackets to fill
the bearing cavities.
Using a grease gun, fill the cavities with
Exxon Polyrex EM
®2 grease until it is seen
coming out from underneath the lip seals.
Exxon Polyrex EM ® grease is the only
recommended grease. Do not use any other
grease.
CAUTION: Bearing Failure
Do not mix different greases together as they will
tend to separate and fail to properly lubricate the
bearing.
Failure to follow these instructions could result in
property damage and/or moderate personal injury.
Normally the maximum desirable operating
temperature for ball bearings should not
exceed 250°F. If the temperature of the
bearing frame rises above the limit, the pump
should be shut down to determine the cause.
Check the temperature using an accurate
measuring device to be sure.
Couplings
Polymer and elastomeric element type
couplings are maintenance free and do not
require lubrication. If other types of couplings
are used, follow maintenance instructions of
the coupling manufacturer.
SEAL INFORMATION
Mechanical Seals
Mechanical seals usually require no
maintenance. To protect the seals, do not run
the pump dry. Replace the seals if leakage is
present.
Packing (Non-Asbestos)
Bell & Gossett does not advocate the use of
asbestos packing material.
On packed pumps the packing is installed
prior to shipment. Before pump is put into
operation check the condition of packing. If
the pump is installed within sixty (60) days
after shipment, the packing will be in good
condition with a sufficient supply of
lubrication. If pump is stored for a longer
period it may be necessary to repack the
2 Polyrex EM is a registered trademark of Exxon Mobile Corp.