11. Dismantling and assembly
WARNING
Before starting any service work, remove the fuses or
switch off the power supply. Make sure that the power
supply cannot be accidentally switched on.
All rotating parts must have stopped moving.
WARNING
Observe all regulations applying to mixers installed in
potentially explosive environments.
Do not carry out work in potentially explosive
environments.
Before starting any work on mixers used in liquids which could
constitute a hazard to health, carry out thorough cleaning and
venting of the mixer, pit, etc., according to local regulations.
11.1 Explosion-proof versions
Explosion-proof versions must be serviced and repaired by
Grundfos or by a service partner appointed by Grundfos.
Spare parts
Replace defective parts. Motor parts must not be reconditioned by
machining, retapping, welding, etc.
11.2 General information
Position numbers of parts (digits) refer to section 16. Exploded
view.
Before dismantling
• Switch off the power supply.
• Disconnect the power supply cable in accordance with local
regulations.
Before assembly
• Clean and check all parts.
• Replace defective parts by new parts.
• Order the necessary service kits.
• Always replace O-rings.
During assembly
• Lubricate and tighten screws and nuts according to section
Torques and lubricants.
Related information
7. Torques and lubricants
11.3 Dismantling the product
11.3.1 Propeller
1. Support the mixer in such a way that the propeller can rotate
freely.
2. Remove the screw (1111) and the hub cover (1109).
3. Gently tap on the back of the propeller (1103) with a plastic
hammer to remove it from the shaft.
4. Remove the lip seal (1104) from the back of the propeller.
11.3.2 Sealing system
Before removing the sealing system, make sure that the mixer have
been drained of oil. See section Oil change.
1. Remove the key (1105) from the shaft.
2. Remove the wear ring (1097) from the sealing flange (1141).
3. Remove the screws (1147).
4. Remove the wear ring (1146).
5. Remove the screw (1144) from the sealing flange (1141).
6. Remove the sealing flange (1141).
7. Remove the O-ring (1142 and 1143) from the sealing flange.
8. Remove the locking ring (1051).
9. Remove the screws (1149).
10. Remove the shaft seal (1098).
11. Remove the O-ring (1100) from the shaft.
Related information
9. Oil change
11.3.3 Bearings and water-in-oil sensor
1. Fit an M6 eyebolt in the drive end of the shaft.
2. Remove the screws (1021).
3. Lift up the shaft with motor flange (1020) approximate 60 mm
above the motor housing (1017).
4. Disconnect the plug of the water-in-oil sensor if fitted.
5. Lift away the shaft.
6. Remove the compensation disc (1038).
7. Place the motor flange with shaft in a vice, and replace the
eyebolt used for lifting, with a screw to protect the threads of the
shaft end.
8. Remove the motor flange (1020) from the shaft using a puller.
9. Remove the O-ring (1022) from the motor flange (1020).
10. Remove the locking ring (1058) from the motor flange.
11. Tap out the drive-end bearing (1047) from the motor flange
(1020) using a hammer and a punch.
12. Remove the non-drive-end bearing (1039) from the shaft (1019)
using a puller.
11.3.4 Cable connection
1. Remove the union nut of the cable plug (181) using the spanner
(B). See Special tools.
2. Remove the cable plug (181).
3. Remove the screw (1041) and washer (1040).
4. Remove the screws (1126).
5. Gently tap on the end cover (1124) until it comes loose, and
placed it closely to the motor housing (1017).
Caution Take care not to damage any wires.
6. Remove the locking ring (1016). See fig. Locking ring inside
cable plug.
TM065385
Locking ring inside cable plug
7. Pull out the male connector (1013).
8. Write down the numbers on the wires to ensure correct
connection.
9. Disconnect the cable conductors from the male connector
(1013) with the molex tool (C). See Special tools
10. Remove the O-ring (1125) from the end cover (1124).
11. Lift away the end cover (1124) from the motor housing (1017).
8
English (GB)
