146 Pneumatic System
Figure 7-1
Drain valves
IMPORTANT: Pay particular attention to the dryer cartridge. On this type of equipment, the compressor works all
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.
Figure 7-2
Air dryer
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