KSB CTN - Dismantling the Thrust Bearings; Removing the Shaft Seal

7 Servicing/Maintenance
45 of 76
CTN / CTN-H
7.4.4 Dismantling the thrust bearings
Grease-lubricated thrust
bearings
▪ Work cleanly and accurately.
ü The notes and steps stated in (ðSection7.4.1,Page43) bis
(ðSection7.4.3,Page44) have been observed/carried out.
1. Unbend lockwasher 931.01 and unscrew slotted round nuts 920.21 (right-hand
thread).
Remove both parts from shaft 210.
Remove angular contact ball bearing 320.02 and spacer discs 550.21 with
bearing bracket lantern 344.
2. Check lip seal 421.03.
3. Remove flanged bend 72-1 from the soleplate.
Oil-lubricated thrust
bearings
▪ Work cleanly and accurately.
▪ Do not damage the oil tube.
Pump size 25/40/50
ü The notes and steps stated in (ðSection7.4.1,Page43) bis
(ðSection7.4.3,Page44) have been observed/carried out.
1. Remove centring sleeve 526.04 including rolling element bearing 321.02 from
the shaft by rotating it (right-hand thread).
2. Unlock and undo slotted round nuts 920.24.
3. Push rolling element bearing 321.02 off the centring sleeve.
4. Remove constant-evel oiler 638.
5. Remove bearing bracket lantern 344 from the soleplate.
Pump size 80/100/125/150/200/250
ü The notes and steps stated in (ðSection7.4.1,Page43) bis
(ðSection7.4.3,Page44) have been observed/carried out.
1. Undo socket head cap screw 914.12 and unscrew bearing nut 923 from the shaft
(right-hand thread).
Remove constant-level oiler 638.
2. Pull centring sleeve 526.04 and angular contact ball bearing 320.02 together
with bearing bracket lantern 344 off the shaft.
3. Remove centring sleeve 526.04 and angular contact ball bearing 320.02 from the
bearing bracket lantern 344.
4. Unlock and undo slotted round nuts 920.24.
5. Push rolling element bearing 321.02 off the centring sleeve.
6. Remove flanged bend 72-1 from the soleplate.
7.4.5 Removing the shaft seal
7.4.5.1 Removing the mechanical seal
ü The notes and steps stated in (ðSection7.4.1,Page43) bis
(ðSection7.4.4,Page45) have been observed/carried out.
1. Remove ring 500.12 with grub screw 904.32 from shaft protecting sleeve 524.02.
2. Undo hexagon nuts 920.09.
Remove seal cover 471.09.
3. Pull complete mechanical seal 433 with shaft protecting sleeve 524.02 off drive
shaft 213.
4. Dismantle stuffing box housing 451.02.