There is risk of burns from hot components and escaping oil.
➤ Wear long-sleeved clothing and gloves.
➤ Open both doors.
10.5.3.1 Draining the cooling oil
The drain points for compressor cooling oil and engine coolant are led to a central point outside.
The cooling oil is drained via pipes which are screwed into the drain openings of the oil separator
tank and the airend and are closed with a shut-off valve. The pipes are sealed with a screwed seal‐
ing plug at the drain end.
Fig. 59 Draining the compressor cooling oil
1
Oil separator tank
2
Oil filler plug
3
Oil cooler
4/5
Shut-off valve (ball valve)
I - open
0 - closed
6
Oil separator tank drain
7
Oil cooler drain
8
Screw plug
9
Screw fitting, cooling oil drain
➤ Remove the plug
2
from the oil separator tank filling port.
Draining the cooling oil from the oil separator tank
1. Place the oil receptacle below the oil separator tank drain point
6
.
2. Unscrew the corresponding screwed sealing cap at the cooling oil drain.
3. Open the shut-off valve
5
at the drainage connection of the oil separator tank and catch the
draining cooling oil.
4. Close the shut-off valve and replace the screwed sealing cap.
10 Maintenance
10.5 Compressor Maintenance
132
Operator Manual Screw Compressor
M114 SIGMA CONTROL SMART
No.: 901765 05 USE
