Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual page 202

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202
Maintenance
25. Loosen the impeller fastening nut (Fig. II, Item 22). Remove the conical spring
washer (Fig. II, Item 23) underneath and pull the impeller (Fig. II, Item 21) off the
pump shaft. Remove the key (Fig. II Item 37).
26. Loosen the screws (Fig. II, Item 10a).
27. Release the lantern from the motor centring device with a two-arm puller (univer-
sal puller) and pull it off the shaft. The mechanical seal (Fig. II Item 25) is removed
at the same time. Avoid jamming the lantern.
28. Push the stationary ring (Fig. II, Item 26) of the mechanical seal out of its seat in the
lantern.
29. Carefully clean the seat areas on the shaft and the lantern.
Installation
NOTICE
For all the following work, observe the screw tightening torque specified for the re-
spective thread type ("Tightening torques" [} 128] table)!
Elastomers (O-ring, mechanical seal bellows) are easier to install with "wetted water"
(e.g. mixture of water and washing up liquid).
1. Clean the flange support and centring surfaces of the pump housing, lantern and
motor flange to ensure proper positioning of the parts.
⇒ Version DN 32 ... DN 80, Fig. I
2. Insert new stationary ring (Fig. I, Item 26) into the lantern piece.
3. Push the new mechanical seal (Fig. I, Item 25) onto the shaft. Avoid damaging the
mechanical seal by jamming it.
4. Push the new spacer (Fig. I, Item 20) onto the shaft.
5. Push the rear retaining ring (Fig. I, Item 36b) onto the pump shaft.
6. Fit the impeller (Fig. I, Item 21) onto the shaft.
7. Push the front retaining ring (Fig. I, Item 36a) onto the pump shaft.
8. Insert new O-ring (Fig. I, Item 19).
9. Insert the motor/drive with impeller and shaft seal into the pump housing and
screw in the flange screws (Fig. I, Item 29), but do not finally tighten them yet.
⇒ Version DN 100 ... DN 125, Fig. II
10. Insert the new stationary ring (Fig. II, Item 26) into the lantern piece. Carefully push
the lantern over the shaft and position it in the old position or another desired an-
gular position relative to the motor flange. Observe permitted installation positions
of the components (see section "Permitted installation positions and change of the
arrangement of components before installation" [} 124]).
11. Screw in the screws (Fig. II, Item 10 and Item 10a). However, do not tighten the
screw (Item 10) completely.
12. Pull the new mechanical seal (Fig. II, Item 25) onto the shaft. Avoid damaging the
mechanical seal by jamming it.
13. Install the impeller with washer(s) and nut, countering at the impeller's outer dia-
meter while doing so.
14. Clean the lantern groove and insert the new O-ring (Fig. II, Item 19).
15. Attach motor impeller unit to the transport lugs with suitable lifting equipment for
protection. When attaching, avoid damaging plastic parts such as the fan wheel
and the upper part of the electronic module.
16. Insert the motor impeller unit (see Fig. 100) into the pump housing in the old or
other desired angular position. Observe permitted installation positions of the
components (see section "Permitted installation positions and change of the ar-
rangement of components before installation" [} 124]).
17. Once the lantern guide has firmly engaged, (about 15 mm before the end position),
there is no longer any danger of tipping or tilting. After securing the motor impeller
unit with at least one screw (Fig. II, Item 29), the fixation can be removed from the
transport lugs.
WILO SE 2022-05