Grundfos LS 100-80-241, Service Instructions Manual

Page: 11 / 48

English (GB)
11
Fitting the upper pump housing
1. Clean the packing face of the upper pump housing (6a), and
fit the pump housing.
2. Knock the guide pins down into the lower pump housing (6b).
3. Remove the guide screws in the lower pump housing (6b).
4. Fit the screws (26d), and tighten them, but leave loose, in the
order shown in fig. 1 (only pump type LS 65-50-330).
5. Fit the screws (26c), and tighten them, but leave loose, in the
order shown in fig. 1.
Fig. 1
Tightening order in principle for screws pos. 26c
6. Tighten the screws (26d) to the correct torque. See section
2.3.1 Tightening torques
. The tightening order is shown in fig.
1 (only pump type LS 65-50-330).
7. Tighten the screws (26c) to the correct torque. See section
2.3.1 Tightening torques
. The tightening order is shown in fig.
1.
8. Check that the shaft can rotate freely.
9. Remove excess gasket material.
Fitting the bearings and shaft seals
1. Clean the O-ring on the shaft seal rotary part (105). Then fit it
along with the washer and spring. Start at the non-drive end.
2. Press the rotary shaft seal part (105) home in the seal housing
(124).
3. Fit the seal housing (124), gasket (113e) and slinger (79).
Note that the slinger must be placed between the stationary
shaft seal part and the bearing.
4. Fit the screws (114). Cross-tighten to the correct torque. See
section
2.3.1 Tightening torques
.
5. Make sure to polish off any burrs on the shaft drive end.
6. Repeat steps 1 to 4 for the drive end.
7. Check that the shaft can rotate freely.
8. Lubricate the bearing (54), and press it home in the seal
housing (124). For lubricant, see section
Ball bearing grease
.
9. Fit the bearing snap ring (54) by moving it with the direction of
rotation. Then tighten the two set screws.
10. Lubricate the bearing (54). For lubricant, see section
2. Service tools
.
11. Fit the gasket (113e), bearing cover (113d) and screws (114a).
Cross-tighten to the correct torque. See section
2.3.1 Tightening torques
.
12. Fit the bearing snap ring (53) by moving it with the direction of
rotation. Then tighten the two set screws.
13. Lubricate the bearing (53). For lubricant, see section
Ball
bearing grease
.
14. Fit the gasket (113e), bearing cover (113c) and screws (114a).
Cross-tighten to the correct torque. See section
2.3.1 Tightening torques
.
15. Check that the shaft can rotate freely.
16. Fit the key (11a).
4.4.2 LS with sleeve, construction type 2
Fitting the impeller
1. Fit the shaft (51) in the impeller (49).
2. Fit the O-ring (66) in the removed shaft sleeve (116a, 116b).
3. Fit the removed sleeve (116a or 116b) on the shaft, and
tighten by hand.
4. Centre the shaft in the impeller (49) by measuring from the
impeller hub to the shoulder on each side of the shaft (51).
5. Tighten the shaft sleeve (116a or 116b).
Fitting the gaskets, impeller and shaft
1. Draw the outline of the old gasket (72a) on a new gasket
material (gasket thickness 0.8 mm), make holes for the
staybolts, and coarsely cut out the gasket.
2. Fit the guide screws in the lower pump housing (6b).
3. Fit the gasket (72a), and cut it out.
4. Fit the snap ring (65).
5. Fit the wear rings (45b) on the impeller (49), and check that
they can rotate freely.
6. Lift the shaft, impeller and wear rings home in the pump
housing. Make sure that the pins at the bottom of the pump
housing engage with the holes of the wear rings.
Fitting the upper pump housing
1. Clean the packing face of the upper pump housing (6a), and
fit the pump housing.
2. Knock the guide pins down into the lower pump housing (26b).
3. Remove the guide screws in the lower pump housing (6b).
4. Fit the screws (26c, 26d), and tighten them, but leave loose, in
the order shown in fig. 2.
Fig. 2
Tightening order in principle for screws pos. 26c
5. Tighten the screws (26c, 26d) to the correct torque. See
section
2.3.1 Tightening torques
. The tightening order is
shown in fig. 2.
6. Check that the shaft can rotate freely.
7. Remove excess gasket material.
T
M
04
18
65
12
08
TM0
4
186
5
1
2
0
8