Air System - Charging (External)
The air system on the motorhome can be charged
from an external air supply source. Located in the generator
compartment is a type C automotive male fitting. Caution
should be used when charging the air system from this
fitting. The air supplied from an external source may con-
tain moisture. Compressed air introduced into the air sys-
tem on the motorhome from this fitting is not filtered by
the air dryer. The auxiliary air charge fitting will charge
the front and rear air tanks. A shut-off valve is installed to
prevent air from escaping.
CAUTION:
The external air supply source should be regulated to charge the air system on the
motorhome no higher than 120 psi. Damage to the air system or pneumatically
operated items may occur
AIR DRYER
The air dryer, located underneath the motorhome next to the transmission, removes moisture from
the compressed air system to prevent freezing of brakes or other pneumatic operated items.
The air dryer has three functions: cooling, filtering and drying the air going through the motorhome
air system. If an excessive amount of water is present when performing the monthly air tank drain serv-
ice, the filter for the air dryer may need to be changed.
Operation:
During system pressure build-up, compressed air passes into the air dryer where the filter system
removes contaminants and passes the air into the drying stage. When the compressor unloads, the
water is expelled and the dry air flows back through the dryer, drying the desiccant for the next cycle.
Initially, moisture condenses in the base of the dryer. Moisture-laden air passes through the desiccant
bed in the air dryer cartridge and is dried.
• The compressor intakes water vapor with the air. The water vapor condenses as it cools.
• The air dryer prevents water accumulation in air lines that could damage seals and valves and
wash away lubricants.
• The air dryer also prevents water in the air lines that can freeze and damage air system
components.
Chassis Information --- Section 10
The Executive 2005
429
090435
Charge
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