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5. Maintenance
5.1 Pump
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 pump head
and the coupling. This will prevent the shaft seal faces from sticking together.
5.2 Motor
Check the motor at regular intervals. It is important to keep the motor clean in order to ensure adequate ventilation. If the pump
is installed in dusty environments, the motor must be cleaned and checked regularly.
Lubrication:
Motors with power ratings lower than 11 kW have greased-for-life bearings.
The bearings of motors of 11 kW and up must be greased according to the indications on the motor nameplate.
The motor should be lubricated with a lithium-based grease meeting the following specifications:
•
NLGI class 2 or 3.
•
Viscosity of basic oil: 70 to 150 cSt at +40°C (~ +104°F).
•
Temperature range: –30°C (~ –22°F) to +140°C (~ +284°F) during continuous operation.
5.3 Service by Grundfos
If Grundfos is requested to service such a pump, Grundfos must be contacted with details about the pumped liquid, etc.
before
the pump is returned for service. Otherwise Grundfos can refuse to accept the pump for service.
Possible costs of returning the pump are paid by the customer.
If a pump has been used for a liquid which is injurious to health or toxic, the pump will be classified as contaminated.
