Thrust Pot Lubrication And Maintenance - Xylem Goulds VIT Instrucciones De Instalación, Operación Y Mantenimiento

THRUST POT LUBRICATION AND MAINTENANCE

OIL LUBRICATED THRUST POT
Pumps are shipped without oil. Oil-
WARNING
lubricated bearings must be lubricated at
jobsite.
It is a good practice to flush the oil reservoir before
first time operation and at the time of oil changes to
remove all grit particles in the oil reservoir sump. Use
the same type of oil to flush reservoir as specified for
lubrication. (See page 28 on recommended turbine oil.)
Remove drain plug (Item # 39) before flushing. Flushing
oil may be poured through oil fill opening (item #33)
after removing oil fill plug #39. The proper oil level
when the unit is not running shall be not more than
to ¼" from the top of the oil sight gauge (Item #37).
Overfilling may result in overheating of the unit. During
operation the oil level in the sight gauge may be higher
than the recommended range mentioned above. Under
no circumstance is it allowed to rotate the unit when the
oil in the sight gauge is not at the required level.
To avoid oxidation of the anti-friction bearings during
shut-down periods lasting longer than one week, it is
recommended to fill up the oil reservoir until the oil runs
over the oil retainer tube (Item #2) and down the shaft
so that the bearings remain completely immersed in the
oil. Before startup, do not forget to drain the excess oil
to its required level. Oil change depends on the severity
of the environment. Generally speaking, when the oil
in the sight gauge changes to a darkish brown color it
is time for an oil change. However, for a longer bearing
life, it is recommended that the oil be changes every six
months. Be sure to flush the oil reservoir (see above)
with each oil change.
GREASE LUBRICATED THRUST POT
Lubricating Intervals in Operating Hours
Operating Speed (RPM)
Thrust
Rating
<1770
2000 lbs 2000
4000 lbs 2000
6600 lbs 2000
(SEE FIGURE 19)
/
1
(SEE FIGURE 18)
1770 2900 3500
2000 2000 1800
2000 1600 1400
2000 1400 1200
The bearing is pre-lubricated at factory. Re-grease the
bearing according the following procedure and per the
schedule in the above table. Following are the re-grease
procedure:
1. Wipe dirt from grease fittings.
2. Check relief port 180º from fitting to make sure it is
open.
3. Fill the grease cavity through the fitting until fresh
grease comes out the relief hole.
4. Ensure the relief port closes.
NOTE: The bearing temperature usually rises after
"
8
re-greasing due to an excess supply of grease.
Temperature will return to normal after the
pump has run and purged the excess from the
bearings, usually two to four hours.
For most operating conditions, lithium based NLGI 2
grease is recommended. This is the grease factory used
for pre-lubrication. This grease is acceptable for bearing
temperatures of 5º to 230º F. Temperature extremes
(either high or low) may require different type grease.
Following table lists some various manufacturers'
compatible grease:
Mobil
Amoco
Ashland
Exxon
Shell
Unocal
Chevron
NOTE: If it is necessary to change the grease type or
consistency, the bearing must be removed and all
the old grease eliminated from the housing and
bearing.
Bearings must be lubricated properly in
WARNING
order to prevent excess heat generation,
spark and premature failure.
Mobilith AW2
Amolith EP2
Multilube EP2
Unirex N2
Alvania EP LF2
Unoba EP2
Dura-Lith EP NLGI2
27