7 Servicing/Maintenance
41 of 68
Multitec A SX
7.2.2.1 Checking the coupling
Check the flexible elements of the coupling. Replace these parts in due time if there
is any sign of wear.
7.2.2.2 Checking the clearances
Excessive clearances will affect pump performance. Losses in efficiency and discharge
head will occur.
Max. clearances
The clearances given refer to the diameter.
Table 12:
Max. permissible clearances
Diameter
Clearance
[mm]
Impellers 230 and 231
Suction-side clearance
0.8
Clearance at the hub
0.8
Balance drum 59.4
0.8
NOTE
If the clearances given are exceeded by more than 1 mm (referring to the diameter)
replace the affected components or restore the original clearance by means of a
casing wear ring.
Contact KSB.
7.2.2.3 Cleaning filters
CAUTION
Insufficient inlet pressure due to clogged filter in the suction line
Damage to the pump!
▷
Monitor contamination of filter with suitable means (e.g. differential pressure
gauge).
▷
Clean filter at appropriate intervals.
7.2.2.4 Checking the bearing seals
DANGER
Excessive temperatures caused by mechanical contact
Risk of explosion!
Damage to the pump set!
▷
Check correct seating of axial seal rings mounted on the shaft.
Only gentle contact of the sealing lip shall be established.