Goulds Pumps JC - IOM - Manual (Page 26)

Conditions Requiring Adjustments
1. Overheated thrust bearings may develop from uneven
adjustment of jam nuts. Check lubrication.
2. Noise, vibration and wear may result from the impeller
rubbing on the suction or hub side casing liners. Adjust
impeller clearance.
3. Poor performance and wear may result from excessive
impeller clearance at the suction side casing liner.
NOTE: Lubricate adjusting studs (356A) for easy
maintenance.
MAINTENANCE OF BEARINGS
BEARING LUBRICATION AND
CARE
!
Bearings must be lubricated properly in order to
prevent excess heat generation, sparks, and
premature failure.
!
The Preventive Maintenance section must be
adhered to in order to keep the applicable ATEX
classification of the equipment. Failure to follow
these procedures will void the ATEX classification
for the equipment.
!
Throughout this section on bearing lubrication,
different pumpage temperatures are listed. If the
equipment is ATEX certified and the listed
temperature exceeds the applicable value shown in
Table 1 under ATEX identification, then that
temperature is not valid. Should this situation occur,
please consult with your ITT/Goulds representative.
$
CAUTION
!
Operation of the unit without proper lubrication will
cause bearing failure, and pump seizure.
OIL LUBRICATION
When the pump is furnished with oil lubrication, a good
grade of oil should be used to insure long bearing life.
NOTE: Pumps furnished for oil lubrication are
shipped without oil. Add oil until the level is up to the
oil level line before the unit is started.
If too much oil is added, there will be excessive heat
generated in the bearings and there may be leakage from
the shaft seals. We recommend a commercial oil such as
Mobil D.T.E. oil, B.B., Tellus 41 or equal. However, a
good grade of #30 or #40 weight is satisfactory for normal
temperatures.
For best results, the weight of the oil lubricant should be
adjusted for the normal operating temperature as follows:
To 150ºF – SAE 20
To 160ºF – SAE 30
To 175ºF – SAE 40
To 200ºF – SAE 50
GREASE LUBRICATION
When the pump is furnished for grease lubrication, the
pump will be shipped with the bearings hand-packed with
Mobilux #2 grease, unless otherwise specified by the
customer. Other suitable greases are Humble Lidok #2,
Texaco Regal Starfak #2, and Shell Alvania #2. If another
brand is desired, it should be checked with the supplier to
determine if it is equivalent to the above.
Installing A Bearing
The bearings have sufficient grease for at least 24 hours of
operation after start-up. The bearings will run hotter than
normal for the first few hours until the grease is worked out
of the ball path and the bearings have “run in”. Adding
more grease during this period may increase the bearing
temperature.
After the first regreasing, a small amount of grease should
be added at each fitting every 500 hours of operation.
Normal Bearing Temperature
Long bearing life is quite dependent on careful handling of
a bearing when it is out of the housing and during the
installation procedure. Dirt and rough handling are prime
enemies of precision bearings. Bearings should be pressed,
not “hammered” into place. If heat is used to facilitate the
installation, a hot oil bath is the best method. Bearings for
grease lubrication should be hand-packed with grease to
insure adequate lubrication at start-up.
NOTE: The shaft seals above each bearing should be
oiled with a few drops of #30 oil before the pump is
started to insure lubrication of the seal lip.
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JC IOM 5/08