Maintenance
10 --- 68
Fig. 30 Changing the cooling oil, oil separator tank
1 Hose coupling (air cooler venting) 6 Male hose coupling/fitting
2 Pressure gauge 7 Shut---off valve
A: closed
B: open
3 Hose coupling (oil separator tank vent-
ing)
8 Maintenance hose
4 Oil filling port with plug 9 Hose coupling (oil drain)
5 Oil level indicator 10 Shut---off valve (venting line)
11 Shut---off valve (oil drain)
Changing the oil with help from internal pressure
Pre---condition: The machine has been running at least five minutes under LOAD.
Machine is switched off.
Machine fully vented (no pressure).
Pressure gauge on the oil separator tank indicates zero.
Close the shut---off valve (10) in the venting line.
Start the machine in idle mode and watch the oil separator tank pressure gauge (2)
until it reads 3---5 bar.
Switch the machine off.
Switch off and lock out the supply disconnecting device.
Wait at least two minutes for oil to flow back to the separator tank.
Changing the oil with help from an external pressure source
Pre---condition: Machine switched off.
Supply disconnecting device switched off and locked out.
Machine fully vented (no pressure).
Pressure gauge on the oil separator tank indicates zero.
External source of compressed air available.
Close the shut---off valve (10) in the venting line.
With the shut---off valve closed, insert the male hose fitting (6) into the hose coupling
(3).
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