Mazak VTC-160A, Maintenance Manual, Page: 62 / 96

5-8
5-5 Pneumatic System
5-5-1 Troubleshooting
Symptom Check Points and Probable Causes Corrective Action Refer to
• The pressure is lower than 5
kgf/cm
2
(71.15 PSI).
1. Insufficient capacity of external
air source
Prepare and connect the air source
meeting the specifications given in 6-
2-3 “Air Source Requirements”. 6-2-3
2. Reducing valve in the air unit is
defective.
Change the reducing valve.
－
3. Mist separator in the air unit is
clogged.
Change the filter element. 5-5-2
4. Leak in the pneumatic circuit.
5. Air pressure switch, mounted in
the spindle unit, is defective.
Contact Mazak Technical Center.
－
• Air is constantly leaking through
the drain port of the air unit.
1. Automatic drain of the mist
separator is defective.
Change the mist separator. 4-6-2, 5-5-2
5-5-2 Maintenance of the Air Unit
1. Changing the filter element of mist separator
!
l Shut off the power to the machine by turning the main power disconnect to the “OFF”
position and disconnect the external air source before changing the filter element.
Attempting to change the filter element without taking these precautions could cause
machine damage or severe injuries.
The filter element is a consumable part and should be changed every two years.
In the list given in 7-2 “List of Wearable Parts”, “element ass’y” indicates a set of filter element, O
ring, and gasket. When changing the filter element, order the “element ass’y”.
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