2. Slowly open the shut-off valve 7 to release pressure.
3. Disconnect the male hose fitting 6 and close the shut-off valve 7 .
10.15 Replenish cooling oil
The machine must be isolated from the compressed air network and completely vented be‐
fore undertaking any work on the pressure system.
Material The hose coupling, shut-off valve and maintenance hose required for venting lie beneath the oil
separator tank.
Precondition Cut-off the electrical power supply via the power supply isolating device,
ensure that the device is locked off,
verify the absence of any voltage.
Fig. 27 Replenish cooling oil
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
1. Vent the machine as described in section 10.15.1.
2. Fill with cooling oil and test run as described in section 10.15.2.
10.15.1 Venting the machine (de-pressurising)
Venting takes place in three stages:
■ Isolate the compressor from the air system.
■ Vent the oil separator tank.
■ Manually vent the air cooler.
10 Maintenance
10.15 Replenish cooling oil
68
Operating Manual Rotary screw compressor
SK 901848 21 E
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