Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual page 201

Fig. 100: Motor impeller unit
Fig. 101: Pressing off the motor impeller unit
via threaded holes (DN 100 ... DN 125)
Installation and operating instructions Wilo-Yonos GIGA2.0-I/-D
Maintenance
10. Removing the screws (Fig. I, Item 29) also detaches the differential pressure sensor
from the motor flange. Suspend the differential pressure sensor (Fig. I, Item 8) with
the holder (Fig. I, Item 13) from the pressure measuring lines (Fig. I, Item 7).
11. Remove the O-ring (Fig. I, Item 19).
12. Remove the front retaining ring (Fig. I, Item 36a) from the shaft.
13. Pull the impeller (Fig. II, Item 21) off the shaft.
14. Remove the rear retaining ring (Fig. I, Item 36b) from the shaft.
15. Pull the spacer (Fig. I, Item 20) off the shaft.
16. Pull the mechanical seal (Fig. I, Item 25) off the shaft.
17. Press the stationary ring (Fig. I, Item 26) of the mechanical seal out of the seat in
the motor flange and clean the seat surfaces.
18. Clean the seating surfaces of the shaft carefully.
⇒ Version DN 100 ... DN 125, Fig. II
19. Loosen and remove the screws (Fig. II, Item 29).
20. Loosen and remove the screws (Fig. II, Item 10). The motor impeller unit remains
securely in the pump housing after the screws have been removed. There is no
danger of tipping even if the motor shaft is horizontal.
NOTICE
The best tool for removing the screws (Fig. II, Item 10) is an angle spanner or socket
wrench with a spherical head, especially for pump types with tight spaces.
21. Removing the screws (Fig. II, Item 10), also detaches the differential pressure
sensor from the motor flange. Suspend the differential pressure sensor (Fig. I,
Item 8) with the holder (Fig. I, Item 13) from the pressure measuring lines (Fig. I,
Item 7). Disconnect the connection cable of the differential pressure sensor in the
electronic module.
22. Pull the motor impeller unit off the pump housing. Use the two threaded holes (see
Fig. 101, Item 1) for this purpose.
23. Screw M10 screws with a suitable length into the threaded holes to loosen the
seat. After approx. 40 mm of pressing out, the motor impeller unit will no longer be
guided in the pump housing.
NOTICE
In order to avoid tipping, the motor impeller unit may have to be supported with
suitable lifting equipment. This is especially the case if no mounting bolts are used.
24. Release the two non-detachable screws from the protective plate (Fig. II, Item 27)
and remove the protective plate.
en
201