Wilo -Stratos GIGA2.0-I Einbau- Und Betriebsanleitung Seite 229

1
2
Fig. 99: Threaded holes and slots for pulling
the motor impeller unit off the pump housing
Fig. 100: Wrench flats on the shaft
Installation and operating instructions • Wilo-Stratos GIGA2.0-I, Wilo-Stratos GIGA2.0-D • Ed.02/2022-07
14. Insert an open-end wrench (22 mm width across flats) into the lantern window and hold
the shaft by the wrench flats (Fig. 100, Item 1). Unbolt the impeller nut (Fig. I, Item 22).
The impeller (Fig. I, Item 21) is automatically pulled off the shaft.
15. Dismantle the shim (Fig. I, Item 20).
1
⇒ Version with cast impeller and parallel key connection
16. Loosen impeller nut (Fig. I, Item 22). Remove the conical spring washer (Fig. III, Item 23)
underneath and pull the impeller (Fig. III, Item 21) off the pump shaft. Dismantle the key
(Fig. III, Item 37).
⇒ The following applies to plastic and cast impellers:
17. Depending on the pump type, loosen the screws (Fig. I and Fig. III, Item 10) and the
screws (Fig. II, Item 10b) or Fig. III, Item 10a.
18. Release the lantern from the motor centring device and pull it off the shaft. The mech-
anical seal (Fig. I, Item 25) and spacer (Fig. I, Item 20) will also be removed at the same
time. Avoid jamming the lantern.
19. Press the mechanical seal's stationary ring (Fig. I, Item 26) out of the seat in the lantern.
20. 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 respective thread type ("Tightening torques" [} 145] 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.
2. Insert a new stationary ring in the lantern. Carefully push the lantern over the shaft and
position it in the old position or another desired angular position relative to the motor
flange. Observe permitted installation positions of the components (see section "Per-
mitted installation positions and change of the arrangement of components before in-
stallation" [} 140]).
en
229