
4.MAINTENANCE B-70264EN/02
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4.3.2 Exhaust Pump Oil
(1) Check method
Watch the oil gauge, and check that the oil level is between
graduations Low and High. Also check whether the oil is dark.
If the oil level is below L, add oil to the turbo blower or replace the
oil in it. If the oil level is above H, drain until the oil level becomes
below H.
Fig.4.3.2(a) Front view of exhaust pump Fig.4.3.2(b) Enlarged view of oil gage
(2) Replacement method
a) Stop the laser oscillator with the correct procedure, and turn the
power off.
b) Remove the oil inlet plug. There is an O-ring on it. Be careful
not to damage it. A missing or damaged O-ring can lower the
exhaust capacity of the pump.
c) Insert the drain tube into a drain oil vessel.
d) Open the drain cock.
e) After the oil has been drained up, close the cock.
f) Pour new oil into the oil inlet, while checking the oil gage.
g) Attach the oil inlet plug.