Flowserve MN - Manual (Page 24)

MN USER INSTRUCTIONS ENGLISH 71569189 11/04
Page 24 of 49
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5.2.3 Bearings–grease lubricated
MN pumps are normally furnished with grease
lubricated bearings. Grease fittings are provided on
the line and thrust bearing ends of the bearing
housing; see detail below. Before starting the pump,
check the bearing frame cavities for grease and add
grease as necessary. For suggested frequency and
grease quantity for re-lubrication, refer to section
5.2.6.2
Proper grease lubrication is very important. Anti-
friction bearings can be over-greased as well as
under-greased. After start up, remove the grease
fittings or pipe plug closest to the cover and allow the
excess grease to flow out.
BEARING FRAME
PLUGGED
GREASE ADDITION
LINE BEARING
PLUGGED
GREASE ADDITION
THRUST BEARING
LINE BEARING END
THRUST BEARING END
Grease fitting locations
The grease flowing out of the bearing
frame may be hot and under pressure. Bearings may
run slightly hot immediately after adding new grease.
Monitor the bearing temperatures until they return to
normal. Any marked increase in the temperature of
the bearings after return to normal operation may
indicate the presence of dirt in the bearing,
insufficient cleaning, improper re-assembly, or a
faulty/damaged bearing. In this case the pump
should be immediately stopped and the cause of the
trouble investigated.
5.2.4 Bearing operating temperatures
The maximum operating temperatures for anti-friction
bearings will differ from unit to unit. In general,
bearing frames using Timken bearings can run 40 o C
(100 o F) or higher above ambient. This should be no
cause for alarm. However, continuously rising
temperatures, or an abrupt temperature rise, are
indicative of possible trouble.
These symptoms require immediate stopping of the
pump and a thorough investigation to determine the
cause of the trouble.
5.2.5 Selection of oil lubricants
The bearings are to be lubricated with a premium
quality paraffinic based turbine or R&O lubricating oil.
The oil should have an ISO 68 Grade, an
approximate Viscosity Index (VI) of 100, a pour point
of -30 o C (-22 o F), and a Timken OK load rating of
16kg (35 lbs) minimum. The oil should shed water
and contain oxidation, rust, and foam inhibitors. The
following oils are acceptable. Others oils meeting the
above requirements may also be used.
5.2.5.1 Recommended oil lubricants
AMOCO Amokon 68 / American Industrial Oil 68
CHEVRON Turbine Oil GST 68 / Machine Oil R&O 68
EXXON Terrestic 68
SHELL Turbo T 68
TEXACO Regal R&O 68
BP Turbinol Select-68
5.2.5.2 Recommended oil fill quantities
See 5.2.2.1 for details
Fr.
No
Line
Bearing,
Timken
Cup #
Cone #
Thrust
Bearing,
Timken
Cup #
Cone #
Initial
Fill Vol.
m 3
(fl·oz.)
Oil Level
mm
(in.)
±3 mm
(±0.125 in.)
6A HM218210
HM218248 9220
92853 0.0019
(64) 58
(2.3)
7H JHM522610
JHM522649 98788
98400 0.0049
(166) 75
(2.9)
8H 95925
95500 HH926710
HH926749 0.0076
(257) 91
(3.6)
8HA 82931
82576 HH926710
HH926749 0.0076
(257) 91
(3.6)
9H H239610
H239640 H936310
H936349 0.0110
(385) 124
(4.9)
9HA 93125
93825 H936310
H936349 0.0110
(385) 124
(4.9)
5.2.6 Recommended grease lubricants
The bearings are to be lubricated with a premium
quality Lithium based NGLI # 2 grease suitable for
anti-friction bearings use. The grease should have a
viscosity range of 150 to 220 cSt (mm 2 /sec) at 40 o C
(100 o F) and Timken load rating of 16 kg (35 lb.)
minimum. The grease should contain rust and
oxidation inhibitors and extreme pressure additives.
See table 5.2.6.1 for grease types that are
acceptable. Equivalents may also be used.