5-3
Maintenance checklist
Inspection interval
Item
Inspection point
Inspection item
Inspection
method
Criterion
(Reference page)
Daily Monthly
Half-
yearly
Yearly
Timing of replacing
consumables
(as a guide)*
1
Temperature Measure
Model VKN-e: Between 0
and 40°C
Model VKP-e: Between –20
and 40°C (2-2)
-
Humidity Measure
85%RH
or
less(2-2)
-
Ambient co
nditi
ons
Dust and other
contaminants
Check against the
specified range.
Visual check
No dust or other
contaminants
-
Voltage
Measure
Specified voltage (2-2)
-
Voltage fluctuation
Measure
Within the allowable
fluctuation range (2-2)
-
Power
Power terminal block
Loose screws
Tighten
Securely tightened
-
Clogging
Disassemble and
inspect
No clogging
-
Impeller
Wear
Disassemble and
inspect
No abnormal condition
When worn out
Main shaft and its
surrounding area
Smooth rotation
Rotate by
hand
Rotation is smooth and
uniform (4-1)
-
Bearing (motor)
*2
Heat
Touch
Not unusually hot (5-1)
2 to 3 years
Mechanical seal
(Model VKN-e)
Leakage Visual
check No
leakage (5-1)
1 year (8000-hour
operation)
O-rings
- -
-
Whenever
disassembled
Others (screws etc.)
-
-
No abnormal condition
As
needed
Appearance
Unusual noise,
vibration
Listen
Visual check
No abnormal condition
-
Pump and
mot
o
r
Insulation resistance
Between the ground
and each lead wire
Megger
tester
1 M
Ω
or more
-
*1
The timing of replacing consumables (as a guide) does not mean their guaranteed service life. The service life of
parts varies depending on the ambient conditions and the conditions for use.
*2
Urea grease is adopted for lubrication inside the bearings to extend their service life. Use a bearing into which urea
grease is filled.
