Goulds Pumps 3498 - IOM - Manual (Page 40)

Do not use graphite. A No.1 or 2 grease is generally
satisfactory for operation at ordinary temperatures, the
lighter grease for operation at high speed or low room
temperature.
Mineral greases with a soda soap base are recommended.
Grease made from animal or vegetable oils are not
recommended due to the danger of deterioration and
forming of acid. Most of the leading oil companies have
special bearing greases which are satisfactory. For specific
recommendations, consult the factory.
The maximum desirable operating temperature for ball
bearings is 180°F. Should the temperature of the bearing
frame rise above 180°F, the pump should be shut down to
determine the cause.
Grease lubricated bearings should not be used where
temperature of the pumped liquid exceeds 350°F.
NOTE: A bearing frame which feels hot to the touch
of the hand is not necessarily running hot. Check with
an accurate temperature measuring device to be sure.
OIL
!
Bearings must be lubricated properly in order to
prevent excess heat generation, sparks and
premature failure.
The oil-lubricated pumps may have an oiling ring, in which
the oil is picked up from the reservoir by a rotating oil ring
and deposited on the shaft and bearings inside the bearing
housing; or they may have an oil slinger, which creates a
shower of fine droplets over the entire interior of the
bearing cavity.
After the pump has been installed, flush the bearing
housing to remove dirt, grit and other impurities that may
have entered the bearing housing during shipment or
erection. Then refill the bearing housing with proper
lubricant. The oil level to be maintained is shown by a line
in the sight glass or oil level indicator.
Experience shows that oils meeting the following
specifications will provide satisfactory lubrication. These
oils can be furnished by all major oil companies. It is the
responsibility of the oil vendor to supply a suitable
lubricant.
(1) Saybolt viscosity at 100° F . . . . 215-SSU-240 SSU
(2) Saybolt viscosity at 210° F . . . . . . . . . . .49 SSU
(3) Viscosity index, minimum . . . . . . . . . . . . . . . 95
(4) API gravity . . . . . . . . . . . . . . . . . . . . .28-33
(5) Pour point, maximum . . . . . . . . . . . . . . . +20° F
(6) Flash point, minimum . . . . . . . . . . . . . . . 400° F
(7) Additives . . . . . . . . . . . Rust & Oxidation Inhibitors
(8) ISO Viscosity . . . . . . . . . . . . . . . . . . . . 46
NOTE: Oils from different supplies should not be
mixed.
The oil should be well refined, good grade, straight cut,
filtered mineral oil. It must be free from water, sediment,
resin, soaps, acid, and fillers of any kind. It should also be
non-foaming with a viscosity of about 150-200 SSU at
100°F. (Approximately SAE-20.)
In installations with moderate temperature changes,
humidity, and dirt, the oil should be changed after
approximately 160 hours of operation. The oil should be
inspected this time to determine the operating period before
the next oil change. Oil change periods may be increased
up to 2000-4000 hours based on an 8000-hour year. Check
the oil frequently for moisture, dirt or signs of
“breakdown.”
$
CAUTION
Do not over oil; this causes the bearings to run hot.
The maximum desirable operating temperature for
ball bearings is 180°F. Should the temperature of the
bearing frame exceed 180°F (measure by thermom-
eter), shut down pump to determine the cause.
3498 IOM 12/04
37
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