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Service and Maintenance
Draining compressed air system
The compressed air tanks are equipped with manual drain
valves. The valves are opened by pulling the ring sideways.
The primary tank should be drained regularly to enable in-
spection of the compressor and air dryer. When the primary
tank is drained regularly there is less risk of damage or ac-
cidents due to defects in the compressor or air dryer. Feel
the air current with your hand! The air should feel dry.
Please note that the purpose of draining is to establish if
there is damp or oil in the compressed air.
Oil found in the air is a sign of damage to the compressor.
Oil found in the air from the compressor also destroys the
drying agent in the air dryer.
If damp or oil is found the drying agent reservoir should be
changed and the other compressed air tanks drained.
Make also sure that the bus is not filled with insufficiently dry
air from for example a ramp or the garage air system.
For maximum safety – drain the primary tank often!
If there is a risk of freezing, the primary tank should be
drained daily.
Damp air in the compressed air system means that
there is a large risk for brake drop out due to the brake
valves freezing in cold weather.
Warning!
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