9. Service and maintenance
45
In this case the oil must be analyzed to check the
permissible length of time that the oil can be used (see
also chapter 9.15). Under no circumstances should the
oil be used beyond its design life.
9.5 Change of oil filter cartridge
Fig. 18
1 Oil filter cartridge
Danger
Only replace the oil filter cartridge when the screw
compressor unit is out of operation and
depressurized!
Be careful with hot oil: Danger of scalding! Do not
spill oil!
Note
Dispose of the oil filter cartridge in line with the
regulations - special waste ! Check for leakage!
For the changing intervals, see the maintenance
schedule.
Change the oil filter cartridge as follows:
• Switch the screw compressor unit off and ensure
that it is depressurized, electrically isolate and
locked off.
• Wait at least 5 minutes for the oil to settle and for
the air to disperse.
• Unscrew the oil filter cartridge ( - 1 - Fig. 18) using
an appropriate tool
• Dispose of the oil filter cartridge according to the
regulations
• Oil the gasket of the new oil filter cartridge slightly
• Screw on the new oil filter cartridge and tighten
manually (take notice of the instructions on the oil
filter cartridge)
• Check for leakage
• Check oil level (see chapter 6.5)
• If required, top up oil.
Changing intervals for oil filter cartridge
The operating conditions (e.g. coolant temperatures),
the operating modes and the quality of the intake air
(e.g. content of dust, content of gaseous foreign matter
such as SO2, solvent vapours, etc.) have a strong
influence on the service life of the filters (air filters, oil
filters, fine separators).
Where such conditions exist the filter element may
require changing more frequently.
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