Atlas Copco — Oil and oil filter change
Maintenance · oil system
From a Atlas Copco operator's manual covering: GA 10 bar, GA 100 psi, GA 125 psi, GA 13 bar, GA 150 psi, GA 175 psi, GA 7.5-8 bar, GA 75, GA5, GA90. Check it applies to your exact model before use.
Applies to: Atlas Copco GA 75
Before you start
- Never mix oils of different brands or types. Use only non-toxic oils.
- Before carrying out any maintenance, repair or adjustment, stop the compressor, press emergency stop button (S3), switch off the voltage and depressurize the compressor.
Procedure
- Run the compressor unloaded for 3 minutes.
- Stop the compressor. Switch off the voltage. Unscrew oil filler plug (FC) one turn only to release system pressure.
- Remove vent plug (VP), wait 5 minutes, remove drain plug (DP2) and catch the oil in a receptacle.
- Remove the oil filters (OF).
- Clean the filter seats on the manifold. Oil the gaskets of the new elements. Screw in until gaskets contact their seats, then tighten by hand (approx. half a turn).
- Drain the oil by removing drain plugs (DP1 and DP3); collect the oil and deliver it to the local oil collection service.
- Reinstall plugs (DP1 up to DP3) and fill the air receiver with oil until the level reaches the filler plug opening.
- Run the compressor for a few minutes; stop, wait a few minutes, depressurize, top up oil to the filler plug opening and tighten plug (FC).
- Reset the oil and oil filter service warnings.
Specs & values
- Screw oil filter elements in until gaskets contact their seats, then tighten by hand approx. half a turn
Source: Atlas Copco operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.