7.3.5 Changing oil
The oil can be changed only when the compressor is stopped and completely depressurised. The
machine should be heated up to the operating temperature (oil temperature between 50 and
60°C).
Maintenance procedure:
-
Stop the compressor and wait until the overpressure in the screw assembly body and oil system
reaches the atmospheric pressure (look at the microprocessor controller).
-
Safeguard the compressor from restarting by an unauthorized person, e.g. by cutting power
supply off.
-
Start the options for manually opening of the oil control solenoid valves in the radiator (see the
controller operating instructions).
-
Unscrew the compressor crankcase ventilation hose on the compressor stage body (see Fig. 11).
-
Place a suitable container and carefully unscrew the oil drain plug located under the oil reservoir
on the hose.
-
Drain the oil from the stage body completely and screw in the drain plug again.
-
Pour new oil through the filler neck to the max.level Close the bleeder hose.
-
Switch on the screw compressor and leave it working for approx. three minutes (the oil cooler
should be completely full).
-
Check the oil level: top up with the missing amount of oil up to max.
-
Used oil should be disposed of in accordance with applicable regulations.
Oil dedicated for oil free screw compressors has been used.
Oil level indicator
