Goulds Pumps 3171 - IOM - Manual (Page 32)

197 Steady bearings
213 Housing, steady bearings
333H Lip seal
369 Retaining ring, steady bearing
Lubricate the sealed bearings with grease cups
For models with grease-lubricated bearings, the spring-operated automatic grease cups are designed to
maintain constant lubrication of the intermediate pump bearings that are fixed to the vertical pump
housing. The center stem protrudes out of the housing when the cup is full and gradually moves down
into the housing as the grease is used. After the wing nut is threaded against the stem zerk fitting and the
bottom of the wing nut rests on the cap of the grease cup, then the grease reservoir is empty and you must
refill it.
Fill the housing
1. Turn the wing nut clockwise until the center stem is raised all the way and the wing nut does not turn
any further.
2. Fit a pressurized grease gun to the top zerk fitting and pump the grease cup full until a small amount
of grease starts to come out of the side vent of the housing.
3. Unthread the wing nut in order to energize the grease cup. Allow the internal spring pressure to push
grease into the bearing lube line.
4. If the stem immediately recedes into the housing and the bearing has been purged, then complete
these steps:
a) Unthread the top lid in order to remove the top of the grease cup.
b) Inspect the plunger for defects.
If all the grease is found on the reverse (or back side) of the plunger, then it is defective and must be
replaced.
Adjust the flow (preferred method)
1. Unthread the wing nut completely against the zerk fitting of the center stem.
2. Unlock the hex nut of the throttling screw and turn the slotted screw clockwise approximately one-
half turn at a time.
3. Relock the hex nut and monitor the stem movement.
If the grease in the grease cup is completely consumed in 1 to 2 weeks of operation, then the flow is
correct and will maintain the proper amount of grease to the bearings.
Adjust the flow (alternate method)
This method provides a more precise amount of grease to the bearings independent of changing operating
temperatures and surrounding conditions. However, you must have a more controlled maintenance
schedule in order to make sure this is done on a regular basis.
1. Leave the throttling screw locked and open.
2. Back off the wing nut several turns for every 2 to 3 days of operation.
Shaft sealing with a mechanical seal
Precautions
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.
Commissioning, Startup, Operation, and Shutdown (Continued)
30 Model 3171 Installation, Operation, and Maintenance Manual