Maintenance 6.4 Maintenance work at fixed service intervals
Page 66 Operating instructions for S 40-3...S 150-3 series screw compressors
13.Switch the compressor off with the OFF button.
14.Check the oil filter again for leaks and tighten by hand, if necessary (proce-
dure as described above).
15.Check oil level. If necessary, top up with oil to offset any losses.
Every 3,000 operating
hours / once a year:
Change the oil separator
Change the oil separator:
– If the difference between network and system pressure exceeds 11 psig.
– If warning message "8" appears on the control system display (if option is
installed).
– After 3,000 operating hours, but not less than once a year.
1. Switch the compressor off with the OFF button.
2. Close ball valve at the compressed air outlet.
3. Remove cladding on the maintenance side.
4. Vent compressor fully (as described at the start of this section).
5. Wait approx. 3 minutes to allow the oil to settle.
6. Unscrew soiled oil separators (4) by hand or use a strap wrench, turning
counterclockwise (see figure below).
Æ Catch the draining oil and dispose of it properly in line with environmen-
tal regulations
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.
WARNING: Risk of injury!
If the prescribed maintenance intervals are not observed, the oil separators
might become blocked In this case, the differential pressure will increase
until the safety valve blows.
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.
WARNING: Risk of injury!
Danger of burning due to hot oil!
Wear protective gloves while working!
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