Grundfos CM Series Service Instructions Manual page 11

5.4.2 Assembly
Assembly of MG 71 and MG 80, see section 5.6.2.
Note
Assembly of MG 90, MG 100, MG 112 and MG 132,
see section 5.7.2.
1. Fit discharge part (pos. 2).
2. Fit and tighten screws (pos. 2b).
See section 3. Tightening torques and lubricants
3. Fit O-ring (pos. 102) on the stationary shaft seal part.
See fig. 16. See section 3. Tightening torques and lubricants.
Fig. 16 Fitting the O-ring on the stationary shaft seal part
4. Press the stationary shaft seal part home. See fig. 17.
Warning
Do not touch the seal face.
Fig. 17 Fitting the stationary shaft seal part (only SiC/SiC)
5. Fit the rotating shaft seal part (pos. 104) so that the seal face
touches the stationary part.
Warning
Do not touch the seal face.
6. Fit O-ring (pos. 107) into the rotating shaft seal part (pos. 104).
See section 3. Tightening torques and lubricants
7. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 18.
Fig. 18 Fitting the stop ring
8. Fit spring (pos. 108) and driver (pos. 112). See fig. 19.
Fig. 19 Fitting the spring and driver
9. Fit short spacing pipe (pos. 64a), impeller (pos. 49),
gasket (pos. 139c) and chamber (pos. 4g).
10.Fit gasket (pos. 139b), spacing pipe (pos. 64), impeller
(pos. 49) and chamber (pos. 4).
11.Continue the assembly until clamp (pos. 64c). For correct
fitting of chambers and impellers, see section 8. Order of
assembly for chambers and impellers.
12.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and
nut (pos. 67). See fig. 20.
Fig. 20 Correct fitting of washers
13.Hold clamp (pos. 64c), and tighten nut (pos. 67).
See section 3. Tightening torques and lubricants.
14.Fit gasket (pos. 139b).
15.Fit inlet part (pos. 6).
16.Fit and cross-tighten staybolts (pos. 26).
See section 3. Tightening torques and lubricants.
11