KSB ILN, Operating Manual

Page: 48 / 92

7 Servicing/Maintenance
48 of 92
ILN / ILNC / ILNR
5211.8/08-EN
7.4.3.3 Dismantling the coupling
Single-suction version
ü
The notes and steps stated in (
ð
Section 7.4.1, Page 46) to
( ð Section 7.4.3.2, Page 47) have been observed/carried out.
1. Remove the coupling guard.
2. Remove tie bolts at the coupling and remove spacer.
3. Remove grub screws on both coupling hubs.
4. Remove the coupling with a puller. Never loosen the coupling by tapping it with
a mallet as this can severely damage the bearings or mechanical seal.
Double-suction version
ü
The notes and steps stated in (
ð
Section 7.4.1, Page 46) to
( ð Section 7.4.3.2, Page 47) have been observed/carried out.
1. Remove grub screws on both coupling hubs.
2. Remove the coupling with a puller. Never loosen the coupling by tapping it with
a mallet as this can severely damage the bearings or mechanical seal.
7.4.3.4 Removing the back pull-out unit
WARNING
Back pull-out unit tilting
Risk of crushing hands and feet!
▷ Suspend or support the bearing bracket at the pump end.
ü The notes and steps stated in ( ð Section 7.4.1, Page 46) to
( ð Section 7.4.3.3, Page 48) have been observed/carried out.
1. If required, suspend or support the back pull-out unit to prevent it from tipping
over.
2. Remove hexagon socket head cap screw 914 between volute casing 102 and
casing cover 161.
3. Pull the back pull-out unit out of volute casing 102.
4. Place the back pull-out unit on a clean and level surface.
ð
After the back pull-out unit has been removed, casing wear ring 502.1 is
accessible.
7.4.3.5 Removing the impeller
ü The notes and steps stated in ( ð Section 7.4.1, Page 46) to
( ð Section 7.4.3.4, Page 48) have been observed/carried out.
ü The back pull-out unit has been placed in a clean and level assembly area.
1. For double-entry design only: Remove hexagon head bolt 901.4.
2. For double-entry design only: Remove spring 950, washer 550.1 and shaft sleeve
523.
3. Undo impeller nut 922.
4. Remove impeller 230.
5. Place impeller 230 on a clean and level surface.
ð After the impeller has been removed, casing wear ring 502.2 is accessible.