K-Series
I/O Manual
Prepared by.
Rev. No.
0
Date.
11-Jan-11
Page.
22 / 25
7. MAINTENANCE, INSPECTION AND OVERHAUL
7.1 Maintenance
Since the life of the pump largely depends on the operating conditions, daily
inspection and periodic servicing are strongly recommended to guarantee maximum
product lifetime.
•
Maintenance and service must be carried out by specially trained persons.
•
The following points should be checked
-
Power consumption
-
Oil level and oil condition
Oil check and oil change
-
Cable entry
Make sure that the cable entry is waterproof, that the cables are not sharply
bent or pinched and that the cable shields have no visual defects.
-
Impeller clearance
Inspection and adjustment of impeller clearance.
-
Pump parts
Check the pump housing, etc. for possible wear. Replace defective parts.
-
Ball bearings
Check the shaft for noisy or heavy operation. Replace defective
bearings.
7.1.1 Current and Voltage
Check the pump current and voltage. If the ammeter reading exceeds the rated value,
or is far lower than rated value, there is a problem with the pump. Voltage should be
stable within (plus minus) 10% of the rated value throughout the operational period.
7.1.2 Vibration
Check that the pump is operating smoothly and without vibration
7.1.3 Discharge Pressure and Flow Rate
Check the discharge pressure and flow rate (If flow meter is provided) at least once a
month. Declining performance can be indicative of the need for overhaul.
Regardless of performance the pressure and flow rate should be stable and rapidly
changing output or pressure is indicative of system problems on the suction or
delivery side.
7.1.4 Insulation Resistance
Check the insulation resistance of the motor at least monthly.
If the value of the insulation resistance has declined sharply from the previous reading
this is indicative of impending insulation failure and the pump should be scheduled for
service even though the insulation resistance may still be over 10 Mega-Ohm.
