15
381497 USA 10-2014
APV
6. With your fingers, remove the stationary seal face (item 5.6),
mounted in the back plate (item 7).
7. Remove the o-ring (item 5.5) from the stationary seal face.
8. Use your fingers to remove the rotary seal face (item 5.7) mounted
in the impeller (item 4).
9. Remove the o-ring (item 5.5) from the rotary seal face.
10. Clean the stator and rotary seal face locations, if necessary with
air or water.
In the case of water-flushed shaft seals, the back plate must be
removed to dismantle the rear shaft seal. The rear stationary seal
face (item 5.6) is mounted in the pressure ring (item 5.11) and the
rotary seal face (item 5.7) is mounted on the shaft (item 11). These
are removed in the same way as the front seal components.
11. Check o-rings (item 5.5) for signs of cracks, lack of elasticity,
brittleness and/or chemical attack. Replace worn or defective
parts.
12. Check the stationary and rotary seal faces for signs of wear too.
The wearing surfaces must be completely free of scratches/cracks.
If not, the rings must both be replaced.
In the case of water-flushed shaft seals, check the rear seal rings
(item 5.6, 5.7) for wear, and replace if necessary.
13. Fit new o-rings on the stationary seal face and rotary seal face.
Note: Remember to moisten these with water.
14. Fit the rotary seal face (item 5.7) on the impeller without using
tools.
Note: The notch in the rotary seal face must be fitted so that it
mates with the driving pin (item 5.8) in the impeller hub.
In the case of water-flushed seals, also fit a rotary seal face (item
5.7) with its o-ring (item 5.5) in the location on the shaft - again
without using tools.
15. Fit the stationary seal face (item 5.6) in the back plate without
using tools.
Note: The notches in the stationary seal face must mate with the
driving dogs on the carrier in the back plate. Check that the
stationary seal face is positioned so that it slides back and forth
easily within the back plate.
When fitting new water-flushed seals, remove the drain pipe (item
5.4) from the stationary seal faces for both the front and rear seal
before fitting them in the pressure ring (item 5.11) and back plate
respectively.
Checking parts for wear
5. Maintenance
Fitting
Dismantling the shaft seal
Note: for numbered items,
see assembly drawing on
page 8.
To Next Page
Loading...
Need help?
General
