XA(S)175 Dd
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4.5
O
IL AND OIL FILTER CHANGE
Fig. 4.2
Oil filters
4.5.1 E
NGINE OIL AND OIL FILTER CHANGE
Consult also the Engine Operation Manual for oil and oil filter
(1) change intervals.
4.5.2 C
OMPRESSOR OIL AND OIL FILTER CHANGE
The quality and the temperature of the oil determine the oil
change interval.
The prescribed interval (See section 4.2) 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.
In this case, contact Atlas Copco.
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. Drain plugs are
located at the oil tank , oil cooler, check valve and oil stop
valve. The two last-mentioned plugs are accessible after
removal of the service door underneath the compressor
element. Catch the oil in a drain pan. Screw out the filler
plug to speed up draining. Tighten the plugs after draining.
3
Remove the oil filter (3), 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 (4)
registers 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 an air
outlet valve (5). Screw out filler plug (2) and add oil until
the pointer of the oil level gauge (4) again registers in the
upper extremity of the green range. Reinstall and tighten
the filler plug.
Never add more oil. Overfilling results in oil
consumption.
4.6
C
LEANING COOLERS
Consult the Engine Operation Manual for engine cooler
cleaning intervals and procedure.
Fig. 4.3
Compressor oil cooler
Keep the compressor oil cooler (1) clean to maintain the
cooling efficiency.
Remove any dirt from the cooler with a fibre brush.
Never use a wire brush or metal objects.
Then clean by air jet in reverse direction of normal flow.
If the dirt is oily, wash the cooler with fuel or a cleansing agent.
Protect the electrical and controlling equipment,
air filters etc. against penetration of moisture.
A spray gun should preferably be used to apply the solvent to
the fins. Rinse the block by means of a water jet max. 80 bar
at 5 cm distance after a soaking-in period. Steam cleaning
may also be applied.
Never leave spilled liquids such as fuel, oil, water
and cleansing agents in or around the
compressor.
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