Goulds Pumps 3420 - IOM - Manual (Page 39)

3. Fill each oiler bottle with oil and replace the oiler
bottle in its housing. The oil will drain into the
bearing housing. Several refills will be required. Oil
will be at the proper level in the housings when oil
remains in the bottle. Do not fill the bearing housings
with oil through any other bearing housing
connection. Refer to Table 2 (p. 27) for setting and
Table 3 for volume.
A high quality turbine oil with rust and oxidation inhibitors
should be used. For the majority of operational conditions,
bearing temperatures will run between 120
°F (50° C) and
180° F (82
° C). In this range, an oil of ISO viscosity grade
68 at 100
° F (40° C) is recommended. If bearing
temperatures exceed 180° F (82
° C) use ISO viscosity
grade 100. See Table 4 for oil requirements.
Some acceptable lubricants are:
GREASE LUBRICATED BEARINGS
Grease lubricated bearings are lubricated at the
factory. Regrease the bearings every 2,000 operating hours
or every three months, whichever comes first.
NOTE: When regreasing, there is a danger of
impurities entering the bearing housing. The grease
container, the greasing device, and the fittings must be
clean.
To grease the bearings:
1. Remove relief plugs on the bearing end covers.
2. Insert grease through the grease fittings while the
shaft is rotating, until grease appears through the
relief plug holes.
3. Operate the unit for approximately 30 minutes with
the relief holes open to prevent overgreasing. After 30
minutes, replace the relief plugs.
NOTE: The bearing temperatures usually rise after
regreaseing due to an excess supply of grease.
Temperatures will return to normal after the pump has
run and purged the excess grease from the bearings.
This usually takes two to four hours.
For most operating conditions, a lithium based mineral oil
grease of NGLI consistency No. 2 is recommended. This
grease is acceptable for bearing temperatures of 5
° F to
230
° F (-15° C to 110° C). Bearing temperatures are
generally 20
° F (18° C) higher than the bearing housing
outer surface temperature. See Table 5 for acceptable
greases.
$
! CAUTION
Never mix greases of different consistency (1 or 3 with
NGLI 2) or different thickener. For example, never
mix a lithium based grease with a polyurea based
grease.
NOTE: If it is necessary to change the grease type or
consistency, the bearings must be removed and the old
grease removed.
3420 IOM 8/09
35
Table 4
Lube Oil Requirements
Exxon Teresstic EP 68
Mobil
Mobil DTE 26 300 SSU
@ 100
o F (38 o C)
Sunoco Sunvis 968
Royal Purple
SYNFILM ISO VG 68
Synthetic Lubricant
5
Table 5
Lubricating Grease Requirements
NGLI consistency 2
Mobil Mobilux EP2
Exxon Unirex N2
Sunoco Multipurpose EP
SKF LGMT 2