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

5.3 Fitting the shaft seal

Do not touch the ceramic faces of the shaft seal.
4
103
104
Shaft seal and seal disc
How to correctly hold the shaft seal
1. Lubricate both sealing parts with soapy water.
2. Place the stationary part of the shaft seal (103) in the outer
motor stool (156b).
3. Lubricate the shaft with soapy water.
4. Place the rotating part of the shaft seal (104) on the shaft.
5. Place the washer (102) on the shaft.

5.4 Assembling the chamber stack

Do not touch the inner ceramic faces of the shaft seals
(103) (104).
1. Make sure you have all components ready and place them on
the shaft of the motor unit (150) in the following order.
10
44a
67
66
44
4
45
49
45a
4a
4
45
49
45a
Assembling the chamber stack
a. Shaft seal, stationary part (103)
b. Shaft seal, rotating part (104)
c. Diffusor, final (3)
d. Diffusor (4a)
e. Backward bushing for impeller (45a)
f. Impeller (49)
g. Forward bushing for impeller (45)
h. Chamber (4)
i. Inlet part for hydraulic (44)
j. Washer (66)
k. Lock nut (67)
l. O-ring (44a)

5.5 Fitting the chamber stack

Make sure that all the components are on the shaft in the
right order.
1. Once all chambers and impellers are in place, fasten the shaft.
Use a large flat screwdriver at the drive-end and a 13-mm
spanner at the non-drive end. Use a torque of 8 Nm.
2. Fit the plug on the nameplate to cover the shaft end.
4a
4
45
49
45a
4a
3
102
104
103