Assembling The Pump - Grundfos SE1 50 Installation And Operating Instructions Manual

10.2.2 Removing the pump housing and impeller
For position numbers, see page 846.
Procedure
1. Loosen the clamp (pos. 92).
2. Remove the screw (pos. 92a) using your fingers.
3. Remove the pump housing (pos. 50) by inserting two
screwdrivers between the sleeve and the pump housing.
4. Remove the screw (pos. 188a). Hold the impeller with a strap
wrench.
Fig. 19 Removing the impeller
5. Loosen the impeller (pos. 49) with a light blow on the edge.
Pull it off.
6. Remove the key (pos. 9a) and the corrugated spring
(pos. 157).
10.2.3 Removing the seal ring and wear ring
Procedure
1. Turn the pump housing upside-down.
2. Knock the seal ring (pos. 46) out of the pump housing using a
punch.
Fig. 20 Removing the seal ring
3. Clean the pump housing where the seal ring was fitted.
4. Remove the wear ring (pos. 49c) with a screwdriver.
Fig. 21 Removing the wear ring
5. Clean the impeller where the wear ring was fitted.
10.2.4 Removing the shaft seal
Procedure
1. Remove the screws (pos. 188).
2. Remove the cover for oil chamber (pos. 58) with a puller.
3. Remove the screws (pos. 186).
4. Remove the shaft seal (pos. 105) with the puller.
5. Remove the O-ring (pos. 153b).
Procedure (pump with sensor)
1. Remove the screws (pos. 188).
2. Remove the cover for oil chamber (pos. 58) with a puller.
3. Remove the screws (pos. 186).
4. Remove the sensor (pos. 521) and holder (pos. 522) from the
shaft seal.
5. Remove the shaft seal (pos. 105) with the puller.
6. Remove the O-ring (pos. 153b).

10.3 Assembling the pump

10.3.1 Fitting the shaft seal
Procedure
1. Fit and lubricate the O-ring (pos. 153b) with oil.
2. Slide the shaft seal (pos. 105) gently over the shaft.
3. Fit and tighten the screws (pos. 186).
4. Fit and lubricate the O-ring (pos. 107) in the cover for oil
chamber (pos. 58) with oil.
5. Fit the cover for oil chamber.
6. Fit and tighten the screws (pos. 188).
Procedure (pump with sensor)
1. Fit and lubricate the O-ring (pos. 153b) with oil.
2. Slide the shaft seal (pos. 105) gently over the shaft.
3. Fit the holder (pos. 522) and sensor (pos. 521) with one of the
screws (pos. 186).
4. Fit the second screw and tighten both screws (pos. 186).
5. Fit and lubricate the O-ring (pos. 107) in the cover for oil
chamber (pos. 58) with oil.
6. Check that the sensor is positioned correctly, see section
8.5 WIO sensor and fig. 13. This is of special importance in
horizontal pumps.
7. Fit the cover for oil chamber.
8. Fit and tighten the screws (pos. 188).
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