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Instruction Manual
4.3 OIL LEVEL CHECK
Fig. 4.1 Check compressor oil level
With the unit standing level, check the level of the compressor oil.
The pointer of the oil level gauge (1) must register in the upper
extremity of the green range. Add oil if necessary. See section 4.2 for
the oil to be used.
4.4 OIL AND OIL FILTER CHANGE
The quality and the temperature of the oil determine the oil change
interval.
The prescribed interval (see section 4.1) is based on an oil
temperature of up to 100 °C and normal operating conditions.
When operating in high ambient temperatures, in very dusty or high
humidity conditions, it is recommended to change the oil more
frequently.
Fig. 4.2 Oil filters
1. Run the compressor until warm. Close the outlet valve(s) 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 oil by removing all drain plugs and open the air
receiver drain valve. Drain plugs are located at the air receiver,
check valve, oil stop valve, gear casing and oil cooler (see Fig.
2.3). Catch the oil in a drain pan. Screw out the filler plug to
speed up draining. Tighten the plugs after draining. Close the air
receiver drain valve.
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 seats on the manifold, taking care that no dirt
drops into the system. Oil the gaskets of the new filter elements.
Screw the elements into place until the gaskets contact their
seats, then tighten one half turn only.
5. Fill the air receiver until the oil level reaches the filler pipe. The
pointer of the oil level gauge (3) must register in the upper
extremity of the green range. Take care that no dirt drops into the
system. Reinstall and tighten the filler plug.
6. Run the unit at no load for a few minutes to circulate the oil and
to evacuate the air trapped in the oil system.
7. Stop the compressor. Let the oil settle for a few minutes. Check
that the pressure is released by opening the air outlet valve(s).
Screw out the filler plug (2) and add oil until the oil level gauge
(3) is in the upper part of the green area. Reinstall and tighten the
filler plug.
Never mix oils of different brands, viscosity grades or
types.
Use only non-toxic oils where there is a risk of inhaling
delivered air.
Before removing oil filler plug (2), ensure that the
pressure is released by opening the air outlet valve(s).
In this case, contact Atlas Copco.
Never add more oil. Overfilling results in oil
consumption.
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