KGE/EN (1711) 6.5 Maintenance 31
KGE
6.8 Mechanical seal
If the mechanical shaft seal should start to leak, the oil chamber will overflow via the hole
in the oil filler cap (C : see figure 10) and the pump must be immediately stopped to
replace the mechanical seal.
6.9 Oil seal
If leakage from (E) is noticed, this indicates the lip seal has failed and needs
replacement.
6.10 Impeller
If there is decline in the performance characteristics of the pump when neither the
installation nor the working point have been changed it is 90% certain that there is wear
on the impeller.
How quickly this wear occurs is dependent upon the type of liquid being pumped. There
is a clearance between the impeller and the pump casing. This clearance becomes
greater through wear. In order to check this, the pump must be dismantled and the
dimension A (see figure 11) measured. It must not exceed 0,5 mm.
The dismantling and reassembly instructions are given in the following chapter.
Figure 10:
Figure 11:
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