Removing The Mechanical Seal; Dismantling The Bearings; Reassembling The Pump Set; General Information/Safety Regulations - KSB Etachrom L Installation & Operating Manual

7 Servicing/Maintenance

7.4.6 Removing the mechanical seal

ü The notes and steps stated in (ð Section 7.4.1, Page 47) to
(ð Section 7.4.5, Page 48) have been observed/carried out.
ü The back pull-out unit has been placed in a clean and level assembly area.
1. Remove the rotating assembly of the mechanical seal (primary ring) from shaft
sleeve 523 (shaft unit 35) or shaft 210.
2. Remove gasket 400.75, if any, from shaft 210 and dispose of it.
3. Remove discharge cover 163 from bearing bracket 330 or intermediate piece
132.01.
4. Remove the stationary assembly of the mechanical seal, consisting of the
mechanical seal's mating ring and the elastomer, from discharge cover 163.

7.4.7 Dismantling the bearings

ü The notes and steps stated in (ð Section 7.4.1, Page 47) to
(ð Section 7.4.6, Page 49) have been observed and carried out.
ü The bearing bracket has been placed in a clean and level assembly area.
1. Undo the grub screw in the coupling hub.
2. Pull the coupling hub off pump shaft 210 with a puller or, for split-hub coupling
designs, undo the screws and take off the hub halves.
3. Remove key 940.02.
4. Remove axial seal rings 411.77 and 411.78.
5. Remove pump-end bearing cover 360.01 and drive-end bearing cover 360.02.
6. Remove circlips 932.01 and 932.02.
7. Press shaft 210 out of the bearing seats.
8. Remove radial ball bearings 321.01 and 321.02, and place them on a clean and
level surface.

7.5 Reassembling the pump set

7.5.1 General information/Safety regulations

WARNING
Improper lifting/moving of heavy assemblies or components
Personal injury and damage to property!
▷ Use suitable transport devices, lifting equipment and lifting tackle to move
heavy assemblies or components.
CAUTION
Improper reassembly
Damage to the pump!
▷ Reassemble the pump (set) in accordance with the general rules of sound
engineering practice.
▷ Use original spare parts only.
Sequence Always reassemble the pump in accordance with the corresponding general assembly
drawing or exploded view.
Sealing elements Check O-rings for any damage and replace by new O-rings if required.
Always use new gaskets, making sure that they have the same thickness as the old
ones.
Always fit gaskets of asbestos-free materials or graphite without using lubricants
(e.g. copper grease, graphite paste).
Etachrom L
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