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English
10. Maintenance, inspection and overhaul
10.1 Maintenance
4HELIFEOFTHEPUMPDEPENDSLARGELYONTHEOPERATINGCONDITIONSSOWESTRONGLY
recommend daily inspection and periodic servicing in order to guarantee maximum
product lifetime.
10.1.1 Current and voltage
Check the pump current and voltage. If the ammeter reading exceeds the rated
VALUEORISFARLOWERTHANTHERATEDVALUETHEREISAPROBLEM4HEVOLTAGESHOULDBE
STABLEWITHINnOFTHERATEDVALUETHROUGHOUTTHEOPERATIONALPERIOD
10.1.2 Vibration
Check that the pump is operating smoothly and without vibrations.
10.1.3 Discharge pressure and flow rate
Check the discharge pressure and flow rate (if a flowmeter is available) at least once
a month. Declining performance can indicate the need for an overhaul. Regardless
OFPERFORMANCETHEPRESSUREANDmOWRATESHOULDBESTABLEANDRAPIDLYCHANGING
pressure or flow rate indicate system problems on the suction or discharge side.
10.1.4 Insulation resistance
Check the insulation resistance of the motor at least once a month.
)FTHEINSULATIONRESISTANCEHASDECLINEDSHARPLYSINCETHEPREVIOUSREADINGTHISIS
ANINDICATIONOFIMPENDINGINSULATIONFAILUREANDTHEPUMPSHOULDBESCHEDULED
for service even though the insulation resistance may still be over 10 megaohms.
10.2 Inspection
5NDERNORMALOPERATINGCONDITIONSREMOVETHEPUMPFROMTHETANKANDINSPECTIT
ONCEEVERYYEAR5NDERSEVEREOPERATINGCONDITIONSWHERESANDlBROUSMATERIAL
ANDSOLIDSAREINVOLVEDDOTHISONCEAMONTH4HESTANDARDINSPECTIONPROCEDURE
is summarized below.
10.2.1 How to remove the pump
1. Hook the lifting chain through the pump lifting bracket and lift so that the chain
just carries the load of the pump.
2. Loosen the bolts/nuts of the discharge pipe to drain away possible water in the
pipe.
2EMOVETHEBOLTSNUTSOFTHEDISCHARGEPIPEANDLIFTTHEPUMPOUTOFTHETANK
