ITT Goulds Pumps 3409, Инструкция по установке, эксплуатации и обслуживанию

Страница: 43 / 72

Oil quality
The oil must be a 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 must also be non-foaming with a viscosity of about
215-240 SSU at 38°C | 100°F (approximately SAE-20).
Lubrication schedule
In installations with moderate temperature changes, low humidity, and a clean atmosphere, change the
oil after approximately 1,000 hours of operation. Inspect the oil at this time to determine the operating
period before the next oil change. Oil change periods may be increased up to 2,000–4,000 hours based
on an 8,000-hour year. Check the oil frequently for moisture, dirt or signs of breakdown, especially during
the first 1,000 hours.
CAUTION:
Risk of bearings overheating and failing.
• Do not over oil the bearings.
• The maximum operating temperature for ball bearings is 82°C | 180°F.
• If the temperature of the bearing frame exceeds 82°C | 180°F (measured by thermome-
ter), shut down the pump to determine the cause.
• Do not mix oils from different suppliers.
6.3.3 Bearing temperatures
• Bearing temperatures up to 82°C | 180°F are normal. For accurate measurement, place a contact-
type thermometer against the bearing housing. Record the reading in a convenient location for ref-
erence.
• The stability of the temperature, rather than the number of degrees, is the best indication of normal
operation. A sudden increase in temperature is an indication of danger and a signal to investigate.
Check the unit for abnormal hydraulic operation and unnecessary loads, such as coupling misalign-
ment. See
7.1 Troubleshooting on page 59 .
• Do not use the human hand as a thermometer. A temperature that feels hot to the hand can vary
from (49°C | 120°F to 54°C | 130°F depending upon the individual. Above this temperature, the hu-
man hand can not accurately estimate temperature.
6.3.4 Coupling lubrication
Grid or gear-tooth couplings
Grid or gear-tooth couplings, such as Falk Grid Steelflex or Falk Crowned Tooth coupling, are initially lu-
bricated with Falk Long Term Grease (LTG) and do not require relubrication for up to three years. If the
coupling leaks grease or is exposed to extreme temperatures or excessive moisture, then more frequent
lubrication is required.
Use the grease recommendations from the coupling manufacturer for the best performance.
Flexible couplings
Flexible couplings, such as Wood’s Sure-Flex or Falk Torus coupling, provide smooth transmission of
power. There is no rubbing action of metal against rubber to cause wear. Couplings are not affected by
abrasives, dirt, or moisture. This eliminates the need for lubrication or maintenance and provides clean
and quiet performance.
6.3 Bearing maintenance
Model 3409 Installation, Operation, and Maintenance Manual 41