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MCHZ
5 Maintenance
5.1
5.2
5.2.1
5.2.2
5.3
MCHZ/EN (0912) 4.2
Daily maintenance
Regularly check the outlet pressure.
No water should get into the terminal box of the electric motor when the
pump room is sprayed clean! Never spray water on hot pump parts! The
sudden cooling down may cause them to burst and hot water may flow out!
Shaft sealing
Stuffing box packing
Do not tighten the gland nuts any more after the running-in period and adjustment. If in
time the stuffing box packing starts to leak excessively, new packing rings have to be
mounted instead of further tightening the nuts!
Mechanical seal
A mechanical seal generally requires no maintenance, however, it should never be
allowed to run dry. If there are no problems, do not dismantle the mechanical seal. As
the seal faces have run in on one another dismantling usually implicates replacement of
the mechanical seal. If a mechanical seal shows any leakage it has to be replaced.
Environmental influences
• Regularly clean the filter in the suction pipe or the suction strainer at the bottom of the
suction pipe, as the inlet pressure may become too low if the filter or the suction
strainer is fouled.
• If there is a risk that the pumped liquid expands during solidification or freezing, the
pump has to be drained and, if necessary, flushed after it has been put out of service.
• If the pump is out of service for a long time, it has to be preserved.
Maintenance
23
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