Instruction Manual
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4.8.3 Compressor oil and oil filter change
The quality and the temperature of the oil determine the oil change interval.
The prescribed interval is based on normal operating conditions and an oil temperature of up to
100 °C (212 °F) (see section 4.5 Preventive maintenance schedule for the compressor).
When operating in high ambient temperatures, in very dusty or high humidity conditions, it is
recommended to change the oil more frequently.
In this case, contact Atlas Copco.
1 Run the compressor until warm. Close the outlet valve(s) (3) and stop the
compressor. Wait until the pressure is released through the automatic blow-
down valve. Unscrew the oil filler plug (2) one turn. This uncovers a vent hole,
which permits any pressure in the system to escape.
2 Drain the compressor oil by removing all relevant drain plugs (4). Catch the oil in
a drain pan. Screw out the filler plug (2) to speed up draining. After draining,
place and tighten the drain plugs (4).
3 Remove the oil filters (1), e.g. by means of a special tool. Catch the oil in a drain
pan.
4 Clean the filter seat on the manifold, taking care that no dirt drops into the
system. Oil the gasket of the new filter element. Screw it into place until the
gasket contacts its seat, then tighten one half turn only.
5 Fill the air receiver until the pointer of the oil level gauge is in the upper part of
the green area. Be sure that no dirt gets into the system. Reinstall and tighten
the filler plug.
(1)
(2)
(3)
(4)
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