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23. Maintenance and service
23.1 Maintenance
23.1.1 Pump
The pump is maintenance-free.
If the pump is to be drained for a long period of inactivity, inject a
few drops of silicone oil on the shaft between the motor stool and
the coupling. This will prevent the shaft seal faces from sticking.
23.1.2 Motor
The motor must be checked at regular intervals. It is important to
keep the motor clean in order to ensure adequate ventilation.
If the pump is installed in a dusty environment, clean and check
the pump regularly.
23.2 Service
If Grundfos is requested to service the pump, it must be cleaned
before it is returned.
If proper cleaning is not possible, all relevant information about
the pumped liquid must be provided.
If the above is not fulfilled, Grundfos can refuse to accept the
pump for service.
Possible costs of returning the pump are to be paid by the
customer.
23.2.1 Integral shaft/coupling
TPE2 and TPE3 pumps have integral shaft/coupling.
We recommend that you do not remove the motor.
If the motor has been removed, it is necessary to remove the
motor stool in order to refit the motor correctly. Otherwise the
shaft seal may be damaged.
23.2.2 Blanking flanges
For twin-head pumps, a blanking flange with a pump housing
gasket is available. See fig. 72.
Fig. 72 Fitting the blanking flange
If one pump requires service, the blanking flange is fitted to allow
the other pump to continue operating.
Warning
Before starting work on the pump, make sure that
the power supply has been switched off for at
least 5 minutes. Make sure that the power supply
cannot be accidentally switched on.
Warning
Make sure that the escaping water does not
cause injury to persons or damage to the
equipment.
Warning
If the pump is used for a liquid which is injurious
to health, it will be classified as contaminated.
In such cases, the proper precautions must be
taken to avoid injury to health when operating or
working on the pump.
TM05 7921 1613
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