Pentair Berkeley Manual Del Usuario página 19

Maintenance
1. Remove the volute and the old gasket(s) and O-Ring(s).
Discard the gaskets and O-rings.
Check the clearance between the impeller hub and the
volute wear ring. If it is more than .020" on a side, replace
the wear ring.
2. Remove the impeller capscrew and washers.
3. Remove the impeller:
Pull keyed impellers off the shaft with a standard gear
puller against the end of the shaft and pulling on the
impeller.
NOTICE: Place the puller's fingers against the back of the
vanes in the impeller. Pulling on the impeller's unsupported
front or back shroud could easily break the impeller. Never
pull on the supported front or back shroud.
4. If your pump has a bolted in balance ring, remove it; if
it has a pressed in balance ring, leave it in place unless
there isn't room to get the seal out past it. If it doesn't
have a balance ring, go to Step 4.
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5. Remove the seal retaining ring (if used) and pull the
rotating part of the seal off the shaft.
6. Pull the seal plate out until it clears the shaft, bringing the
stationary part of the seal out with it. Tap the seal out of
the seal plate and clean the seal cavity.
7. Install the new stationary seal in the seal cavity.
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8. Reinstall the seal plate (if used) now.
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9. After lubricating the rotating part of the seal, slide it onto
the shaft and sleeve until it seats against the stationary
(ceramic) part.
10. Compress the seal spring on the shaft sleeve and
reinstall the seal retaining ring (if used).
11. Reinstall the balance ring (if used).
12. Reinstall the shaft key.
13. Slide the impeller onto the shaft until it seats solidly
against the shaft shoulder, then install a new impeller
screw with its associated hardware.
14. Replace the volute. Use new gasket(s) and O-Ring(s).
Check the clearance between the balance ring and
the impeller hub. If it is more than .020" on a side,
replace the balance ring.
Apply a small amount of mineral oil to the O-Ring or
cup seat of the stationary seal.
Use a cardboard washer (supplied) and a piece of
pipe as a press; press the stationary seal into place.
Do not damage the seal face!
Cover all shaft threads with tape to protect the seal
during installation.
Apply a small amount of mineral oil to the inside
diameter of the rubber ring in the rotating seal and to
the outside of the shaft sleeve.
Slide the seal plate over the shaft now, taking care to
avoid damage to the stationary part of the shaft seal
as it goes over the shaft shoulder.
19
Mechanical
Seal
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