KSB MK, Installation & Operating Manual

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7 Servicing/Maintenance
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MK
Tightening torques For reassembly, tighten all screws and bolts as specified in this manual.
(
ð Section 7.6, Page 48)
7.5.2 Reassembling the pump section
7.5.2.1 Re-assembling the pump set (MK)
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. Pack the cranked sealing groove of ring 500.01 with grease. Then fit the ring in
thrust and radial bearing 303.01.
5. Fit radial ball bearing 321 with fitted sleeve 520 and shaft 210 in prepared
thrust and radial bearing 303.01.
6. Insert the key into the motor shaft.
7. Slide the motor shaft into sleeve 520.
8. Bolt the motor to thrust and radial bearing 303.01 with hexagon head bolts
901.01.
9. Apply a thin coat of grease to the bearing positions on shaft 210.
10. Press ring 550.01 into the first support column 712.01 following thrust and
radial bearing 303.01.
11. Swiftly press bearing bushes 545 into the corresponding radial bearings 303.02
and 303.03 (if any).
CAUTION
Damage to the shaft assembly
Warping of the shaft!
▷ Support the shaft assembly if the shaft is long.
12. Carefully slide first support column 712.01 with fitted ring 550.01 on the shaft.
Secure it to radial bearing 303.01 with nut 920.01.
13. Depending on the installation depth, carefully fit further radial bearings 303.02
and 303.03 (if any) with pressed-in bearing bush 545 and support columns
712.02/.03 and secure them with hexagon head bolts 901.03 and nuts 920.03.
14. Slide impeller 230 onto the shaft stub and secure it with grooved pin 561.02.
Make sure it is firmly seated.
15. Apply a thin layer of grease to the impeller face 230 at the sealing clearance.
16. Press casing wear ring 502 into volute casing 102. Screw in studs 902.02.
17. Carefully pull prepared volute casing 102 over impeller 230. Screw it to the
bottom radial bearing 303.02 and support column 712.02/.03 with hexagon nuts
920.02.