Tsurumi PU Submersible Vortex Sewage Pump - Manual (Page 17)

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Storage
If the pump will not be operated for a long period of time, pull the pump up, wash the
pump, allow it to dry, and store it indoors.
Note:
For reinstallation, be sure to perform a trial operation before putting the pump into opera-
tion.
If the pump remains immersed in water, operate it on a regular basis (i.e. once a week).
Note:
Refer to section "Oil Inspection and Change Procedures" below for further detail.
Interval
Monthly
Daily
Inspection Item
Yearly
Semi-yearly
Measuring the operating current
Measuring the insulation resistance
Note: The motor must be inspected if the insulation resistance is considerably lower
than the last inspection.
Inspecting oil (models with 0.15~0.75kW power output)
3,000 hours or 12 months, whichever comes first
Inspecting oil (models with 1.5kW power output)
6,000 hours or 12 months, whichever comes first
Power supply voltage variation
= within ±10% of the rated voltage
Measuring the power voltage
Once every
2 years
Once every
2 to 5 years
Changing oil (models with 0.15~0.75kW power output)
Note: The inspection and replacement of the mechanical seal requires specialized
equipment. To have this operation performed, contact the dealer where this
equipment was purchased, or the Tsurumi sales office in your area.
Overhaul
Note: To overhaul the pump, contact the dealer where it was purchased, or the
Tsurumi sales office in your area.
4,500 hours or 24 months, whichever comes first
Changing oil (models with 1.5kW power output)
9,000 hours or 24 months, whichever comes first
Changing the mechanical seal (models with 0.15~1.5kW power output)
Insulation resistance reference value = 1MΩ minimum
Inspecting the pump A noticeable drop in performance
may indicate wear on the impeller or
other parts, or else clogging of the
strainer. Replace any worn parts, or
remove the clogged debris.
Inspecting the
operation of air
release valve
Check to confirm that the air release
valve (air-lock prevention device)
works normally when you start the
pump.
Inspection of lifting Replace if damage, corrosion, or wear has occurred to the chain or
rope. Remove if foreign object is attaching to it.
To be within the rated current
The pump must be overhauled even if the pump appears normal during operation.
Especially, the pump may need to be overhauled earlier if it is used continuously.
air
release
valve
Section of a pump casing
Inspection of the operation
of air release valve
Daily and Periodic Inspection