Draining the oil from the airend
Fig. 32 Changing the cooling oil, airend
1 Airend gas discharge point
2 Hose coupling (oil drainage)
3 Shut-off valve
4 Safety screen
5 Coupling
1. Have an oil receptacle ready.
2. With the shut-off valve closed, insert the male hose fitting 6 (Fig. 30) into the hose coupling 2 .
3. Place the other end of the maintenance hose in the oil receptacle and secure it in place.
4. Open shut-off valves 3 and 7 (Fig. 30)
5. Remove the coupling safety screen 4 and turn the coupling 5 by hand at least five revolutions
until all the oil has run out.
6. Fit the safety screen again.
7. Close the shut-off valve 3 and unplug the male hose fitting.
Result The cooling oil is drained from the airend.
A small amount of cooling oil may flow back into the oil cooler and oil separator tank as a result of
turning the coupling.
Remove this by repeating the steps for draining oil from the separator tank and oil cooler.
Filling with cooling oil
1. WARNING!
Compressed gas!
Compressed gas and devices under pressure can injure or cause death if the contained ener‐
gy is released suddenly.
➤ De-pressurise all pressurised components and enclosures.
2. Slowly open the filler plug 4 (Fig. 30).
3. Fill with cooling oil.
4. Check the filler plug and ring seal for damage and screw the plug back in again.
Starting the machine and performing a trial run
1. Close all access doors, replace and secure all removable panels.
2. Open the user's shut-off valve at the inlet and outlet ends.
10 Maintenance
10.16 Changing the cooling oil
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
73
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