Flowserve LNN - Manual (Page 27)

LNN, LNNV, LNNC USER INSTRUCTIONS ENGLISH 71569074 06-14
Page 27 of 56
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j) Check the tightness of the connections.
k) Check dirt and dust is removed from areas around
close clearances, bearing housings and motors.
l) Check coupling alignment and re-align if necessary.
m) Verify the correct operation of the system.
The equipment used for maintenance and
disassembly in an ATEX zone must be in conformity
with the requirements zone.
Our specialist service personnel can help with
preventative maintenance records and provide
condition monitoring for temperature and vibration to
identify the onset of potential problems.
If any problems are found the following sequence of
actions should take place:
a)
Refer to section 7, Faults; causes and remedies,
for fault diagnosis.
b) Ensure equipment complies with the
recommendations in this manual.
c) Contact Flowserve if the problem persists.
6.2.1
Routine inspection (daily/weekly)
The following checks should be made
and the appropriate action taken to remedy any
deviations:
a)
Check operating behaviour. Ensure noise,
vibration and bearing temperatures are normal.
b) Check that there are no abnormal fluid or
lubricant leaks (static and dynamic seals) and
that any sealant systems (if fitted) are full and
operating normally.
c) Check that shaft seal leaks are within acceptable
limits.
d) Check the level and condition of oil lubricant.
On grease lubricated pumps, check running
hours since last recharge of grease or complete
grease change.
e) Check any auxiliary supplies eg heating/cooling,
if fitted, are functioning correctly.
f) Refer to the manuals of any associated
equipment for routine checks needed.
6.2.2
Periodic inspection (six monthly)
a) Check foundation bolts for security
of attachment and corrosion.
b) Check pump running records for hourly usage to
determine if bearing lubricant requires changing.
c) The coupling should be checked for correct
alignment and worn driving elements.
d) Refer to the manuals of any associated
equipment for periodic checks needed.
6.2.3 Re-lubrication
Lubricant and bearing temperature analysis can be
useful in optimizing lubricant change intervals. In
general, however, the following is recommended.
6.2.3.1
Oil lubrication
Maintaining the correct oil level is very
important.
If the pump is supplied with a constant level oiler the oil
level will be automatically maintained and as long as oil
is visible in the glass bottle there is no need to refill. If
however a sight glass has been fitted then regular
checks should be made to ensure the level is
maintained at the centre of the glass window.
Refer to section 5.1.1 for methods of oil fill, section
5.2.1 for oil grade recommendations and 5.2.4 for the
schedule and temperature limits.
6.2.3.2
Grease lubrication
See section 5.2.2 for grease
recommendations.
Regrease - via grease nipples every 2 000 hours or
sooner depending on the severity of the application.
a) It is important not to under or over grease the
bearings as this will lead to overheating and
premature failure. Grease lubricated bearing
housings have grease nipples fitted in the
bearing covers.
b) Move the axial seal ring back so the gap between
the pump shaft and bearing cover can be seen.
c) Connect grease gun to the nipple.