Wilo Stratos GIGA Serie Instrucciones De Instalación Y Funcionamiento página 58

English
2
Fig. 47: Threaded holes and slots for press-
ing off the motor impeller unit from the
pump housing
Fig. 48: Wrench surfaces on the shaft
Installation
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13. Press the motor impeller unit (see Fig. 13) off the pump housing.
It is a good idea to use two threaded holes (Fig. 47, Item 1) for this;
particularly to loosen the seating. Screw two suitable screws into
the threaded holes to loosen the seating. If the motor impeller
unit can be moved easily, slots (Fig. 47, Item 2) between the pump
housing and the lantern can also be used for pressing off (for
example, use two screwdrivers as levers to do this). After pressing
out about 0.6 in (15 mm) , the motor impeller unit will no longer be
guided in the pump housing.
NOTE:
When pressing out further, the motor impeller unit (see Fig. 13) must,
if necessary, be supported by lifting equipment to prevent possible
tipping (especially if no mounting bolts are used).
14. Release the two captive screws at the protective plate (Fig. 7,
Item 18), and remove the protective plate.
15. Put an open-end wrench (0.9 in/22 mm is the best size) into the
lantern window and hold the shaft steady with the wrench sur-
faces (Fig. 48, Item 1). Unscrew the impeller nut (Fig. 7, Item 15).
The impeller (Fig. 7, Item 16) is automatically pulled off the shaft.
16. Depending on the pump type, loosed the screws (Fig. 7, Item 10)
or alternatively, the screws (Fig. 46, Item 8).
17. Release the lantern by using the two-arm pull-off-tool (universal
pull-off-tool) from the motor centering device and pull it off the
shaft. The mechanical seal (Fig. 7, Item 12) will also be removed
when this is done. Prevent the lantern from being canted.
18. Press the mechanical seal's counter ring (Fig. 7, Item 17) out of the
seat in the lantern.
19. Carefully clean the seating areas of the shaft and the lantern.
NOTE:
For the following steps, observe the screw tightening torque speci-
fied for the respective thread type (see Tab. 2 "Screw tightening
torques"). Be sure to use a calibrated torque wrench.
20. Clean the flange support and centering surfaces of the pump
housing, lantern and motor flange to ensure proper positioning of
the parts.
21. Insert a new counter ring in the lantern.
22. Carefully push the lantern over the shaft and position it in the old
position or another desired angular position to the motor flange.
Observe the permitted installation positions of the components
WILO SE 01/2014