3. Place the other end of the maintenance hose in the oil receptacle and secure it in place.
4. Open the shut-off valve 11 .
5. Slowly open the shut off valve 7 in the maintenance hose to release oil and close immediately
when air escapes.
6. Close the shut-off valve 11 and unplug the male hose fitting.
Draining the oil from the cooler
Fig. 31 Changing the cooling oil, oil cooler
1 Oil cooler
2 Hose coupling (oil drainage)
3 Shut-off valve
6 Plug-in nozzle
7 Shut-off valve
1. Have an oil receptacle ready.
2. With the shut-off valve closed, insert the male hose fitting 6 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 the shut-off valve 3 .
5. Slowly open the shut-off valve 7 and allow cooling oil and gas to escape completely until the
pressure gauge on the oil separator tank reads 0 bar.
6. Close the shut-off valve 3 and unplug the male hose fitting.
10 Maintenance
10.16 Changing the cooling oil
72
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2 ESD_2C_10357405_10–LIN_00 E
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