Removing The Chamber Stack; Removing The Shaft Seal - Grundfos SCALA1 SI Service Instructions Manual

4.6 Removing the chamber stack

1. Remove the plug (169) on the nameplate to access the shaft
end.
2. Find the locknut (67) at the non-drive end of the shaft. To
remove the locking nut, place a 13-mm spanner on the nut and
place the handle so that it rests against a flat surface to avoid
spinning.
3. To loosen the shaft, use a large flat screwdriver at the drive-
end and, at the same time, hold the 13-mm spanner at the non-
drive end.
Loosening the shaft
4. Remove the locknut (67) and the washer (66).
5. Remove the impellers and chambers, starting with the inlet part
for the hydraulic (44) and finishing with the final diffusor (3).
44
44a
Removal of inlet part of hydraulic

4.7 Removing the shaft seal

Do not touch the ceramic faces of the shaft seal.
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103
104
Shaft seal and seal disc
How to correctly hold the shaft seal
1. Remove the washer (102).
2. Pull off the rotating part of the shaft seal (104) by inserting the
tip of two small flat screwdrivers.
Removing the rotating part of the shaft seal
3. Remove the stationary part of the shaft seal (103) by inserting
the tip of two small flat screwdrivers and pulling it off.
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