KSB Multitec A SX, Installation & Operating Manual

Page: 51 / 68

7 Servicing/Maintenance
51 of 68
Multitec A SX
3.
Pull off impeller 230.1 and remove the respective key.
4.
Remove and dispose of O-ring 412.1.
5.
Hold the shaft in vertical position, if possible.
6.
Repeat steps 1-5 up to and including the suction impeller (231).
7.5 Reassembling the pump set
7.5.1 General information/Safety regulations
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.
CAUTION
Elastomers in contact with oil/grease
Shaft seal failure!
▷ Use water as assembly lubricant.
▷
Never use oil or grease as assembly lubricant.
Sequence
Always reassemble the pump in accordance with the corresponding general assembly
drawing.
Seal elements
▪
Gaskets
–
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).
▪
O-rings
–
Never use O-rings that have been glued together from material sold by the
metre.
–
Always use new O-rings.
▪
Assembly adhesives
–
For gaskets, avoid the use of assembly adhesives, if possible.
–
Should assembly adhesives be required after all, use a commercially available
contact adhesive (e.g. "Pattex").
–
Only apply adhesive at selected points and in thin layers.
–
Never use quick-setting adhesives (cyanoacrylate adhesives).
–
Coat the locating surfaces of the individual components and screwed
connections with graphite or similar before reassembly.
Tightening torques
For reassembly, tighten all screws as specified in this manual.
(
ð
Section 7.6, Page 56)
7.5.2 Reassembling the hydraulic system
ü Start reassembly from the suction end.
ü Reassemble the pump in vertical position, if possible.
ü The clearance between the last impeller 230.1 or 230.3 and the balance drum
59-4 (or spacer sleeve 525.4) is between 0.7 and 1.2 mm.