Draining the oil from the airend
Fig. 34 Changing the cooling oil, airend
1 Compressed air outlet on airend
2 Hose coupling (oil drainage)
3 Shut-off valve
4 Safety screen
5 Coupling
1. Have an oil receptacle ready.
2. With the shut-off valve closed, insert the male hose fitting 6 into the hose coupling 2 .
3. Place the end of the maintenance hose in the oil receptacle and secure it in place.
4. Open shut-off valve 3 (and 7 from 32)
5. Remove the coupling safety screen 4 and turn the coupling 5 by hand at least five revolutions
until all the oil has run out.
6. Fit the safety screen again.
7. Close the shut-off valve 3 and unplug the male hose fitting.
Result The cooling oil is drained from the airend.
A small amount of cooling oil may flow back into the oil cooler and oil separator tank as a result of
turning the coupling.
Remove this by repeating the steps for draining oil from the separator tank and oil cooler.
Draining the oil from the heat recovery system
Shut-off valves are provided for draining the oil from the heat recovery system. In machines equipped
with an external heat recovery system (option W1), the oil is drained from the appropriate point.
10 Maintenance
10.15 Changing the Cooling Oil
9_5721 06 USE
Service Manual Screw Compressor
ASD T Tri-Voltage
77
Option W1–W3
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