Maintenance
10 --- 71
Remove the protective screen (1, Fig. 33) and turn the coupling (2, Fig. 33) by hand at
least five revolutions until all the oil has run out.
Replace and secure the safety screen (1, Fig. 33).
Close the shut---off valve (3) and unplug the hose.
Turning the coupling can cause a small amount of oil to flow back to the cooler and separ-
ator tank.
Drain oil from the separator tank via the hose coupling (9, Fig. 30).
Drain oil from the oil cooler via the hose coupling (2, Fig. 31).
10.13.4 Draining the oil from the heat recovery system (option W1/W2/W3)
Pre---condition: Machine fully vented (no pressure)
Pressure gauge on the oil separator tank indicates zero.
The procedure is dependent on the heat recovery system installed.
Internal heat recovery (option W2 / W3)
Fig. 34 Cooling oil changing, internal heat recovery
1 Hose coupling
2 Thermostatic valve
3 Shut---off valve
Have an oil container ready.
With the shut---off valve closed, insert the male hose fitting (6 in Fig. 31) into the hose
coupling (1) on the thermostatic valve (2).
Place the end of the maintenance hose in the oil container and secure it in place.
Open the shut---off valve (3) and (7, Fig. 31) and wait for the cooling oil to drain out.
Close the shut---off valve (3) and unplug the hose.
Prepared for heat recovery (option W1)
Have an oil container ready.
Use the maintenance hose to drain the oil from the drain point of the heat recovery
system.
10.13.5 Filling with cooling oil
Open the oil filler plug (4, Fig. 30) slowly.
Fill with oil.
Machines with heat recovery systems need correspondingly more oil.
Check the plug and gasket for damage and re---insert the plug.
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