3 Bearing Frame Assembly
3.1 General
The inboard of lower bearing is an angular contact ball bearing with high thrust capacity and the out-
board or top bearing is a high radial capacity ball bearing. Grease is the standard lubricant, but bearing
assemblies can be furnished for oil lubrication.
3.2 Bearing Lubrication and Care
NOTICE:
The shaft seals (332) at each bearing should be oiled with a few drops of #20 or #30 oil before
the pump is started to ensure lubrication of the seal lip while the seal is "running in."
Grease lubrication
When the pump is furnished with grease lubrication, a quality bearing grease equivalent to Mobilux #2
should be used to ensure long bearing life.
Grease lubricated pumps are assembled with the bearings hand-packed with grease at the factory and
should be allowed to run for eight hours before any grease is added. The suggested interval for adding a
small amount of grease is five hundred (500) hours; however, the operating conditions and experience of
the customer with other equipment can be used to establish a more suitable lubrication schedule for the
particular application.
Adding excessive amounts of grease will increase the bearing temperature and shorten the lubricating
life of the grease. See
Figure 10: Stuffing Box Packing on page 13
.
Oil lubrication
When the pump is furnished with oil lubrication, a high quality bearing oil should be used to ensure long
bearing life. 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., or B.B., or equal. However, a good grade of non-detergent oil of #30 weight is usually satis-
factory. The oil should have a minimum viscosity of 100 Sec. Saybolt at the normal operating tempera-
ture.
For normal operating conditions, change the oil at least once a year and thoroughly flush the bearings. If
the bearing assembly is exposed to dirty or moist conditions, the oil should be changed more often.
3 Bearing Frame Assembly
Model HS Installation, Operation, and Maintenance Manual
17
Summary of Contents for Goulds Pumps HS
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