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INSTRUCTION MANUAL
6. Maintenance and Overhaul
While the life of the pump depends largely on the ambient conditions, daily servicing
and inspection helps extend service life considerably. To achieve that, carry out the
maintenance as follows :
6.1 Daily Checks
Check the following items at least once a week.
(1) Current
If the ammeter reading exceeds the motor rating listed on the data plate or is
abnormally lower than usual, it is an indication of a problem.
(2) Voltage
Voltage should be within ± 10% of the rated value throughout operation.
(3) Vibration
Check for the abnormal vibrations.
(4) Protective devices
Check protective devices by reading the panel indicator.
6.2 Monthly Checks
Check the following items at least once a month.
(1) Discharge pressure
Check pump discharge pressure and discharge flow rate (if flow meter is
provided).
(2) Insulation resistance
Operation is safe as long as insulation resistance is more than 2MΩ. If higher
than 2MΩ, but this occurs after a sharp decline form a certain value, check
the cables, and / or overhaul is required.
6.3 Annual Checks
Even if there is nothing wrong with the pump under normal service condition, it should
be lifted out and inspected once a year at least.
Particularly, when the pump is in use under severe conditions, such as where the
liquid being handled contains sand or is corrosive, or oversized debris is pumped
through, inspect it as often as circumstances allow.
A recommended procedure for inspection is outlined below. If mechanical seal must
be replaced or on overhaul is considered necessary as a result of the inspection,
contact nearest dealer, or us directly.
PM32U
P.23
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