Fig. 27 Changing the cooling oil, oil separator tank
1 Hose coupling (air cooler venting)
2 Pressure gauge
3 Hose coupling (oil separator tank venting)
4 Oil filler port with plug
5 Cooling oil level indicator
6 Plug-in nozzle
7 Shut-off valve
A Shut-off valve open
B Shut-off valve closed
8 Maintenance hose
9 Hose coupling (oil drain)
10 Shut-off valve (venting line)
11 Shut-off valve (oil drain)
Oil changing with help from internal pressure Changing the oil using an external compressed
air source
The machine has been running for at least 5 mi‐
nutes under LOAD.
The machine is fully vented,
the pressure gauge on the oil separator tank
reads 0 bar.
1. Close the shut-off valve 10 in the venting
line.
2. Start the machine and watch the oil separa‐
tor tank pressure gauge 2 until it reads 3–
5 bar.
3. Switch off the machine.
4. Wait at least 2 minutes to allow the oil to
flow back to the separator tank.
The supply disconnecting device is switched off,
the device is locked off,
the absence of voltage has been verified.
The machine is fully vented,
the pressure gauge on the oil separator tank
reads 0 bar.
An external source of compressed air is availa‐
ble.
1. Close the shut-off valve 10 in the venting
line.
2. With the shut-off valve closed, insert the
male hose fitting 6 into the hose cou‐
pling 3 .
3. Connect the maintenance hose to the exter‐
nal air supply.
4. Open the shut-off valve 7 until the pressure
gauge on the oil separator tank reads 3–
5 bar.
5. Close the shut-off valve 7 and remove the
male hose fitting from the coupling.
Draining the oil from the separator tank
Contact KAESER Service if condensate is detected in the cooling oil.
It is necessary to adapt the airend discharge temperature to individual ambient conditions.
10 Maintenance
10.15 Changing the cooling oil
9_5717 20 E
Service Manual Screw Compressor
ASK T SIGMA CONTROL BASIC
75
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