Gardner Denver L4-5C Original User Manual page 43

ADDITION OF OIL BETWEEN CHANGES must be made when the oil level is below the minimum level of
the sight glass as read while the unit is completely off and blown down, and the foam has settled out.
1. Be sure the unit is completely off and that no air pressure is in the oil reservoir.
2. Disconnect, lockout and tagout the power supply to the starter.
3. Wipe away all dirt around the oil filler plug located on top of the oil sump.
4. Remove the oil filler plug and add oil as required to return the oil level to the middle of the sight
gauge.
5. Install oil filler plug, run and check for leaks.
DO NOT OVERFILL (you should see oil slightly above the full line after running fully loaded and then
shutting down the machine and allowing the foam to settle out). The quantity required to raise the oil level
from "ADD" to "FULL" is shown on Figure 5-1. Repeated addition of oil between oil changes may indicate
excessive oil carry-over and should be investigated.
Excessive oil carry-over can damage equipment. Never fill oil reservoir above
the "FULL" marker.
OIL CHANGE INTERVAL - Recommended oil change intervals are based on oil temperature, see Figure
5-2 for typical trends for the standard lubricant (AEON 4000) and a synthetic lubricant (AEON 9000SP).
Consult Gardner Denver for additional lubricant types available for your compressor.
When operating conditions are severe (very dusty, high humidity, etc.), it will be necessary to change the
oil more frequently. Operating conditions and the appearance of the drained oil must be surveyed and the
oil change intervals planned accordingly by the user. Gardner Denver offers a free oil analysis program
with the AEON lubricants, and we recommend a sample be sent in at 100 hours on a new unit.
Discharge Temperature
Up to 180°F (82°C)
180° to 190°F (82°C to 88°C)
190° to 200°F (88°C to 93°C)
200°F+ (93°C)
AEON 4000
Change Interval
4000 hrs.
3000 hrs.
2000 hrs.
1000 hrs.
Figure 5-2 Oil Change Interval
13-25-629 v03 Page 43
AEON 9000SP
Change Interval
8000 hrs.
6000 hrs.
4000 hrs.
2000 hrs.