Air Dryer - Wittke STARLIGHT Maintenance Manual

To drain the air tanks, apply the following procedure:
1.
Locate the drain valves on air tanks (see Figure 6-3).
N : Some trucks are equipped with more than one drain valve.
OTE
2.
Open the valves by turning them one-quarter turn clockwise.
Before opening the valves, be sure to stay away from the stream.
I :
MPORTANT
3.
Leave the valves open until moisture is removed.
4.
When all moisture has been drawn out, close the valves by turning them one-quarter turn
counter-clockwise.
Figure 6-3 Drain valves
Pay particular attention to the dryer cartridge. On this type of equipment, the compressor works all
I :
MPORTANT
the time due to the frequent use of the brake system. As a result, a lot of moisture is injected into the
air system. For more information, see Air Dryer below.

Air Dryer

Some units are equipped with an air dryer and/or alcohol evaporator.
These devices are used to reduce water in the air system, preventing corrosion or freezing of the air
components in cold weather.
Maintenance on the air dryer and/or alcohol evaporator is covered by the chassis manufacturer's
maintenance manual.
Pneumatic System 67