5-3
5.4 Periodic
inspection
Caution
If you need to carry out work that requires disassembly of the unit—such
as replacement of parts, repairs, or inspection, ask the vendor or the
service provider specified by the manufacturer, or Teral Inc.
Improper work may lead to malfunctions or accidents.
(1) Clean the dirt and oil deposited on the outside surface of the coolant pump.
(2) Accumulated cutting powder in the tank (oil tank) may cause a pump failure. Clean the tank (oil
tank) at regular intervals.
(3) Check that the strainer of the pump is not clogged. If clogged, clean the strainer.
Caution
Clean the strainer on the pump suction side at regular intervals.
A clogged strainer may cause pressure fluctuations, decrease in discharge
rate, unusual noise, etc., which may lead to a pump failure.
(4) For other inspection items, refer to the following maintenance check list.
Maintenance check list
Inspection interval
Consumables
Item
Inspection point
Inspection item
Inspection
method
Criterion
(Reference page)
Daily Monthly
Half-
yearly
Yearly
Timing of replacement
(as a guide)*
Temperature
Measure
-20 to 40°C or less (2-2)
-
Humidity
Measure
Less than 95% RH (2-2)
-
Ambient
environmen
t
Dust, etc.
As per the range in
the specifications
Visual check
Free of dust or other
contaminants
-
Voltage
Measure
Specified voltage (2-2)
-
Voltage fluctuation
Measure
Within the allowable range
of voltage fluctuation (2-2)
-
Power
Power terminal block
Loose screws
Retighten
No loose screws
-
Clogging
Inspect after
disassembly
No clogging
-
Impeller
Wear
Inspect after
disassembly
No abnormal condition
When worn out
Around the main shaft
Smooth rotation
Rotate by
hand
Rotation is not stiff and is
uniform (4-1)
-
Bearing
*2
(Motor)
Heating
Touch
Not unusually hot (5-1)
1 to 2 years
Mechanical seal
Leakage
Visual check No leakage (5-1)
1 year (8000-hour
operation)
Submerged bearing
(bearing ring and sleeve)
-
-
No abnormal condition
1 to 2 years
O-rings - -
-
Whenever
disassembled
Rubber
parts
Oil seals,
etc.
-
-
No abnormal condition
1 to 2 years
Others (screws etc.)
-
-
No abnormal condition
As
needed
Appearance
Unusual noise,
vibration
Listen
Visual check
No abnormal condition
-
Pum
p and
m
oto
r
Insulation resistance
Between the ground
and each lead
Megger
tester
1 M
Ω
or more
-
*1
The timing of replacement (as a guide) is not a guaranteed value. The useful life of parts varies
depending on ambient environment and use conditions.
* Long-life urea grease is used as lubricating grease in bearings. When you replace the parts, it is
recommended to use a grease equivalent to the following:
•
Bearings by NSK (EA2 grease)
•
Bearings by NACHI (FNS3D grease)
