KSB MK, Installation & Operating Manual

Page: 45 / 64

7 Servicing/Maintenance
45 of 64
MK
18. Fit screw plug 903.01 with joint ring 411.01 in radial bearing 303.02 and 303.03
(if any).
19. Install any lubricating lines.
20. Fit float switch control equipment, if any.
NOTE
For lubrication by the fluid handled, the Ermeto pipe fitting to be installed in the
support column and the weld-on threaded union with the pipe to be installed in
the discharge pipe are supplied but not fitted.
7.5.2.1.1 Installing the shaft seal
The bearing assembly is sealed by washers in the ball bearing of the thrust and radial
bearing and a grease-backed ring. The MK/MKA models are additionally equipped
with a vapour barrier (PTFE ring) in upper support column 712.01.
1
2
3
4
5
6
Fig. 11: Shaft seal MK/MKA
1 Radial ball bearing 2 Grease fill
3 Vapour barrier (PTFE ring) 4 Vent groove
5 Washers 6 Nilos ring
7.5.2.2 Re-assembling the pump set (MKA)
NOTE
If the shaft is worn at the bearing positions, it may be turned upside down and
installed again for continued use. At first re-installation in reversed position, the
running faces on the shaft are as new. The bearing bushes have to be replaced at
the same time.
1. Press sleeve 520 into radial ball bearing 321 in cold condition.
2. Pull shaft 210 into sleeve 520 and secure it with grooved pin 561.01. Make sure
it is firmly seated.
CAUTION
Insufficient lubrication
Damage to the bearing!
Prior to fitting the Nilos ring, pack its cranked sealing groove with grease.
3. Fit studs 902.01 in thrust and radial bearing 303.01.
4. Insert studs 902.12 into thrust and radial bearing 303.01.
5. Pack the cranked sealing groove of ring 500.01 with grease. Then fit the ring in
thrust and radial bearing 303.01.
6. Fit radial ball bearing 321 with fitted sleeve 520 and shaft 210 in prepared
thrust and radial bearing 303.01.
7. Insert the key into the motor shaft.