Goulds Pumps 3171 - IOM - Manual (Page 39)

Regrease the thrust bearing
NOTICE: Make sure that the grease container, the greasing device, and the fittings are clean. Failure to
do this can result in impurities entering the bearing housing when you regrease the bearings.
1. Wipe dirt from the grease fittings.
2. Remove the two grease-relief plugs from the bottom of the frame.
3. Fill both of the grease cavities through the fittings with a recommended grease until the fresh grease
comes out of the relief holes.
4. Make sure that the frame seals are seated in the bearing housing.
If they are not, press them in place with the drains located at the bottom.
5. Reinstall the grease-relief plugs.
6. Wipe off any excess grease.
7. Recheck the alignment.
The bearing temperature usually rises after you regrease due to an excess supply of grease. Temperatures
return to normal in about two to four operating hours as the pump runs and purges the excess grease
from the bearings.
Steady bearings
Check the ID of the casing collar (155) and steady bearing (197) per the dimensions in the Bearing fits and
tolerances table. If the ID is greater than what is allowed, remove the snap ring (369) and use a suitable
hydraulic press in order to remove these items for replacement. If sealed bearings are provided, then you
must also remove the lip seals (333H).
The bearing ID is slightly larger before you press it into the housing in order to allow for ID shrinkage
after you press it in place.
Shaft-seal maintenance
Mechanical-seal maintenance
WARNING:
The mechanical seal used in an Ex-classified environment must be properly certified. Prior to startup,
make sure that all areas that could leak pumped fluid to the work environment are closed.
CAUTION:
Never operate the pump without liquid supplied to mechanical seal. If you run a mechanical seal dry, even
for a few seconds, this can cause seal damage. Physical injury can occur if a mechanical seal fails.
NOTICE:
• Sealing systems that are not self-purging or self-venting, such as plan 23, require manual venting prior
to operation. Failure to do so will result in excess heat generation and seal failure.
• Cooling systems, such as those for bearing lubrication and mechanical-seal systems, must be operating
properly to prevent excess heat generation, sparks, and premature failure.
• The mechanical seal must have an appropriate seal flush system or excess heat generation and seal
failure can occur.
Reference drawing
The manufacturer supplies a reference drawing with the data package. Keep this drawing for future use
when you perform maintenance and seal adjustments. The seal drawing specifies the required flush fluid
and attachment points.
Maintenance (Continued)
Model 3171 Installation, Operation, and Maintenance Manual 37