Xylem Flygt 3201, Установка, эксплуатация и обслуживание, Страница: 38 / 48

3. Sleeve screws
4. Cap nuts
Figure 10: HS 3201
Remove the impeller and the wear protections
For the HS-version, also remove the wear protections.
1. Disconnect and remove the drive unit end from the pump housing.
2. Lay the drive unit end on its side.
3. Remove the impeller screw or nut.
4. Depending the pumps model, do the following.
If the pump model is
a...
Then...
HS-version
1. Remove the washer.
2. Remove the impeller using a impeller puller for HS-versions.
3. Remove the upper wear protection.
4. Unscrew the four cap nuts and withdraw the lower wear protection from the
pump housing.
Other version Remove the impeller, impeller hub, or propeller using a impeller hub.
Install the impeller and the wear protections
For the HS-version, also install the wear protections.
1. Prepare the shaft:
a) Make sure that the end of the shaft is clean and free from burrs.
Polish off any flaws with a fine emery cloth.
b) Make sure that the key is seated in the keyway on the shaft.
c) Grease the end of the shaft.
2. Mount the impeller, impeller hub, or propeller
a) If the pump is a HS-version, fit the upper wear protection.
b) If the pump is another version, clean and oil all the sealing surfaces and O-rings.
c) Grease the impeller hub.
d) If the pumps is a LT-version, place the sleeve on the impeller screw.
e) If the pump is another version, place the washer with the gasket. Use the O-ring on
the impeller or propeller screw.
Not applicable for HS-, or LT-version.
f) Press the impeller, impeller hub, or propeller onto the shaft with the impeller or
propeller screw.
Heat the impeller, impeller hub, or propeller to about 100°C (212°F), to ease the
fitting.
Maintenance
36 Flygt 3201 Installation, Operation, and Maintenance Manual