Operating instructions for S 40-3...S 150-3 series screw compressors Page 71
Maintenance 6.4 Maintenance work at fixed service intervals
To drain off the old oil:
7. Slowly open the stop valve.
8. The pressure of the air cushion forces the oil into the collecting vessel.
9. Once the compressed air/oil receiver has been completely drained, close
the stop valve.
10.Remove the cap nut from the solenoid valve.
11.Unscrew the oil plug (7) on the compressed air/oil cooler.
12.Drain off residual oil (max. 1.3 gallons) into a suitable container.
13.Reinsert the oil plug.
14.Change oil filter (procedure as described above).
15.Change oil separators (procedure as described above).
To fill up with new oil:
16.Fill up to the edge of the thread of the filling socket (max.) (procedure as
described above).
17.Reattach the cover on the maintenance side.
18.Conduct trial run.
19.Switch the compressor off with the OFF button.
20.Check the oil filter and oil separator for leaks.
21.If necessary, tighten the oil filter and oil separator by hand (procedure as
described above).
22.Check oil level (procedure as described above).
23.If necessary, top up with oil to offset any losses.
WARNING!
After each oil change you have to fill a small quantity of oil into the suction
controller before starting the compressor.
For oil quantity and procedure see section entitled “Commissioning following
extended stoppages”, page 43.
WARNING!
Always fill with the same oil type as previously used. Never mix different oil
types and brands.
The oil circuit must be flushed through prior to changing the oil type.
WARNING: Risk of injury!
Press the emergency stop button, use the mains disconnection device to iso-
late the compressor from the power supply and fix a padlock to prevent the
power from being switched on again unintentionally.
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