Flowserve FRBH - Manual (Page 33)

FRBH, FRBHX AND FRBHS USER INSTRUCTIONS ENGLISH 71569178 10-04
Page 33 of 54
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6.2.3.1 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.
It is important not to under or over grease the bearings
as this will lead to over heating and premature failure.
a) 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.
d) Press grease into the bearing housing until the
first signs of it appear in the gap between the
housing and shaft, then stop greasing.
e) V-rings should be seated at the proper distance
from the sealing surface to avoid overheating.
f) The maximum allowable operating temperatures
for anti friction bearings will vary from unit to unit,
depending on ambient and fluid temperature. The
rise above ambient should not normally exceed
55
°
C (131
°
F) or a combined maximum of 95
°
C
(204
°
F).
g) A continuously rising temperature or an abrupt
temperature rise indicates a problem. If these
symptoms occur, stop the pump immediately and
investigate the cause.
TIME
TEMPERATURE
Grease change - every 4 000 hours or sooner
depending on the severity of the application.
a) Remove the bearing housing from the rotor
assembly.
b) Brush the bearing housing with hot kerosene (100
to 115 °C/212 to 240 °F) or other non-toxic
solvent.
c) Clean and flush out the housing with a light
mineral oil.
d) Do not use waste oil to clean the housing.
To clean the bearings:
a) Wipe off as much grease as possible with a clean
lint-free cloth.
b) Brush bearings with hot kerosene (80 to 90 °C/
175 to 195 °F) while gently spinning the outer
bearing ring.
c) Spin each ball to ensure that it is clean.
To remove badly oxidized grease which refuses to
come off:
a) Support the rotor in a vertical position and
immerse the bearing in hot kerosene or a mixture
of alcohol and light mineral solvent.
b) Gently spin the bearing outer ring.
c) Dry and reflush the bearing with clean light oil.
d) It is important not to under or over grease the
bearings as this will lead to over heating and
premature failure. It is recommended that the
bearings be filled with grease using a suitable
spatula. In addition the housings should be no
more than half filled.
6.2.3.2 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.
6.2.4 Mechanical seals
No adjustment is possible. When leakage reaches an
unacceptable level the seal will need replacement.
6.2.5 Gland packing
The stuffing box split gland can be completely
removed for re-packing or to enable the addition of
extra rings of packing.
The stuffing box is normally supplied with a lantern
ring to enable a clean or pressurised flush to the
centre of the packing. If not required, this can be
replaced by an extra 2 rings of packing.
There must always be a small leakage, normally a
minimum of 120 drops per minute to atmosphere to
lubricate and cool the packing is required.