Grundfos S Series Service Instructions Manual page 21

9.5.6 Fitting the secondary shaft seal
1. Place the motor in horizontal position.
2. Make sure that the shaft is clean and smooth.
3. Fit the O-ring on the stationary part of the secondary shaft
seal (105b).
4. Lubricate the O-ring and fit the stationary part on the
secondary shaft seal (105b) on the shaft and press it home
(N).
5. Check that the O-ring is fitted on the rotating part of the
secondary shaft seal (105b).
6. Fit the rotating part of the secondary shaft seal (105b) on the
shaft.
7. Fit the set-up clip between the seal parts and press the
rotating part of the seal home (N).
8. Tighten the set screws in the secondary shaft seal (105b) to a
torque of 6 Nm.
9. Remove the PUR-tool and the set-up clip from the secondary
shaft seal (105b).
9.5.7 Fitting the shaft seal housing
1. Fit the O-rings (72 and 72a).
2. Fit the shaft seal housing (58) on the stator housing (55).
3. Fit the screws (184).
4. Fit the O-ring (107) on the seal housing cover (77). Lubricate
the O-ring.
5. Fit the seal housing cover (77).
9.5.8 Fitting the primary shaft seal
1. Make sure that the shaft is clean and smooth.
2. Fit the O-ring on the stationary part of the primary shaft seal
(105).
3. Lubricate the O-ring and fit the stationary part on the
secondary shaft seal (105) on the shaft.
Make sure that the gap in the stationary part meets the
projection on the lower bearing bracket (155).
4. Press home the stationary part of the primary shaft seal (105)
(O).
5. Check that the O-ring is fitted on the rotating part of the
primary shaft seal (105).
6. Fit the rotating part of the primary shaft seal (105b) on the
shaft.
7. Fit the set-up clip between the seal parts and press the
rotating part of the seal home (O).
8. Tighten the set screws in the primary shaft seal (105) to a
torque of 6 Nm.
9. Remove the PUR-tool and the set-up clip from the primary
shaft seal (105b).
10. See section
10.1 Tightness test of shaft seal
Check the possible leak paths with leak detecting
liquid.
The tightness of the complete motor must be verified
through a submersion test.
9.5.9 Fitting the motor top cover
1. Fit the O-ring (157) on the motor top cover (164a).
2. Place the cover near the pump and connect the cables
according to the wiring diagram. See section
connections.
3. Fit the absorbing bag.
4. Fit the motor top cover (164a). Tap gently, if needed.
Make sure the groove in the motor top cover comes on the pin
(59b).
5. Fit the screws (178).
9.5.10 Fitting the cooling jacket
1. Fit the O-rings (37a and 157b).
2. Mount the cooling jacket (150c) on the stator housing (55)
using a hoist. Tap gently, if needed.
3. Fit the screws (150a).
9.5.11 Fitting the lifting bracket
1. Fit the lifting bracket (190) so that the "nose" is pointing
towards the pump outlet.
2. Fit the screws (190b).
housing.
Fig. 20 Lifting bracket orientation, installation type S
The upper bearing bracket must be closed within one
hour after the new moisture absorbing bag has been
exposed to atmospheric humidity.
This section applies only to pumps with cooling
jacket.
Make sure the orientation of the lifting bracket is
correct. Wrong installation can cause pump tilt during
lifting.
Pin (59b)
Oil plugs (193)
11.4 Electrical
Pump outlet
21