
B-70264EN/02 4.MAINTENANCE
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4.3.3 Exhaust Pump Filter
(1) Replacement method
When the operation time reaches 3000 hours or the exhaust capacity
gets lowered, replace the filter. A clogged filter may cause a whitish
smoke of oil mist to come out of the pump or lower the exhaust
capacity.
a) Stop the laser oscillator with the correct procedure, and turn the
power off. The pump is hot immediately after it has stopped.
Start the work after the pump has cooled down.
b) Remove the black screw from the exhaust pump unit, then
remove the filter cover and O-ring.
c) Remove the spring and washer.
d) Pull out the exhaust filter element.
e) Check the mounting orientation of a new exhaust filter element,
then insert the filter. A filter element mounted improperly may
cause oil mist (whitish smoke) to come out of the gas outlet.
Therefore, check again that the filter is mounted properly.