Oil And Oil Filter Change - Atlas Copco GA 18 Instruction Book

12.3 Oil and oil filter change

Warning
Procedure
1. Run the compressor until warm. Stop the compressor. Close the air outlet valve and switch off the
voltage. Depressurize the compressor by opening the manual drain valve(s). Wait a few minutes and
depressurize the air receiver/oil tank by unscrewing oil filler plug (FC) just one turn to permit any
pressure in the system to escape.
2. Open the filler plug (FC) and drain the oil by opening the valve at the bottom of the oil tank (OT).
Also remove the drain plug near the element outlet. Close the drain valve and fit the plugs after
draining.
3. Collect the oil and deliver it to the local collection service. Refit and tighten the drain and vent plugs
after draining. Tighten the top connection of the oil cooler.
4. Remove the oil filter (OF). Clean the seat on the manifold. Oil the gasket of the new filter and screw
it into place. Tighten firmly by hand.
5. Remove filler plug (FC).
Insert an elbow coupling in the filler plug opening for easy filling. Fill the air receiver/oil tank (OT)
with oil until the level reaches the middle of sight-glass (Gl).
Fill the air receiver/oil tank (OT) with oil until the level reaches the filler neck.
Take care that no dirt drops into the system. Refit and tighten filler plug (FC).
6. Run the compressor loaded for a few minutes. Stop the compressor and wait a few minutes to allow
the oil to settle.
7. Depressurize the system by unscrewing filler plug (FC) just one turn to permit any pressure in the
system to escape. Remove the plug.
Add oil until the sight glass (Gl) is 3/4 full.
Take care that no dirt enters the system. Tighten the filler plug.
140
Always apply all relevant
Always drain the compressor oil at all drain points. Used oil left in the compressor can
contaminate the oil system and can shorten the lifetime of the new oil.
Never mix lubricants of different brands or types as they may not be compatible and the
oil mix will have inferior properties. A label, indicating the type of oil filled ex factory, is
stuck on the air receiver/oil tank.
If the compressor is equipped with an Energy Recovery unit, also drain the oil in the
heat exchanger.
Safety precautions.
Instruction book
2920 7140 90