Flowserve MN - Manual (Page 23)

MN USER INSTRUCTIONS ENGLISH 71569189 11/04
Page 23 of 49
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5.2 Pump lubricants
Determine the mode of lubrication of the pump set,
e.g. grease, oil, and product lubrication.
For oil lubricated pumps, fill the
bearing housing with correct grade of oil to the
correct level, check sight glass.
Oil quantities are provided in section 5.2.5.2. Grease
lubricated pumps and electric motors are supplied
pre-greased. See section 5.2.6.2 for approximate
grease filling quantities information. Other drivers
and gearboxes, if appropriate, should be lubricated in
accordance with their User Instructions.
5.2.1 Bearings-oil lubricated
MN pumps can be furnished with oil lubricated
bearings at the customers request. However,
although the oil and grease lubricated bearing frames
are physically interchangeable in whole, individual
parts may or may not be interchangeable. Check
with the nearest Flowserve Sales Representative to
determine inter-changeability of the parts.
Oil circulation and lubrication is achieved by the
bearing rollers pumping oil through the bearings
towards the covers. During operation, a level drop of
up to 6 mm (0.25 in.) can occur due to this bearing
pumping action. If oil is added during operation, do
not adjust to the static oil level as this over-oiling may
cause the bearing end cover seals to leak.
Before starting the pump, check the
bearing frame oil level and add oil to the bearing
frame as necessary. Refer to the table in sec 5.2.5.2
for the correct bearing frame oil level. Assuming that
the oil level in the bearing frame is properly
maintained and contamination is minimal.
Oil lubricated anti-friction bearings are
factory lubricated to prevent rusting for a short period
of time only. Immediately upon receiving equipment,
fill the oil reservoir to the proper level with the proper
lubricant. If the units are to be stored longer than six
months, fill the bearing frame cavity with a good
quality R&O oil capable of providing rust protection to
the parts. See section 2.4.3 for details on Long Term
Storage .
5.2.2 Filling the oil reservoir
Pumps with oil lubricated bearings are equipped with
an externally mounted oil level sight gauge and vent
cap as shown in figure . Introduce oil into the bearing
frame by removing the vent and fill the bearing
housing to the level as given in Table 5.2.5.2. The oil
level measured from the centerline of the shaft. See
detail in section 5.2.2.1 below. After filling with oil,
mark the correct static oil level on the sight glass, and
maintain this level to within ±3 mm (±0.125 in.).
5.2.2.1 Bearing housing showing oil fill/vent and oil level checker (typical)
This is a STATIC oil level and the oil level will drop during operation; verify that the vent plug is
properly installed so that a false level is not realized.
BEARING
LOCKWASHER
LOCKWASHER
LOCKNUT
THRUST
BEARING
OIL FILL/VENT
SHIM
LINE BEARING
OIL THROWER
SEAL
SHAFT
SEAL
THRUST
BEARING
COVER
BEARING
FRAME
LEVEL
CHECK
LINE
BEARING
COVER
STUFFING
BOX HEAD
OIL
VENT CAP
OIL FILL
SIGHT GAUGE
OIL LEVEL
OIL DRAIN
PLUG
PUMP SHAFT
OIL LEVEL