Holiday Trip 2012, Owner'S Manual

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2012 Trip
The pneumatically operated items are
divided into two categories: brakes and
accessory air. Brakes have full use of supplied
air pressure. Accessory air items, such as
the auxiliary air fitting, receive air through
pressure protection valves (PPV). The PPV
will not allow compressed air flow until
about 60 psi. In the event of an air system
problem, the pressure protection valve will
leave a reserve air charge for braking. Pressure
protection valves are installed for safety.
Air Governor
The air governor regulates the air compressor
to cut-in and cut-out, keeping the air system
in the specified operating range of 110 to 135
psi, then sends an air “purge” signal to the Air
Dryer.
Cut-in pressure of about 110 psi is factory
preset from the governor manufacturer and is
not adjustable. Cut-out pressure is calibrated to
approximately 135 psi. When cut-out pressure
is reached, the governor will send an air purge
signal to the air dryer. This opens the purge
port of the air dryer, expelling moisture. The
purge action of the air dryer is identified by the
short release of air (chuff).
Air Storage Tanks
Two air storage tanks are located on the
chassis. Manually drain the air tanks once
a month, or more, depending on operating
conditions and humidity levels.
To Drain the Tanks:
Slowly open the drain valves. Moisture
will be expelled under pressure. After
all moisture and air is purged from the
tanks, the valves should remain open
an additional five minutes to allow any
moisture remaining a chance to drain.
Close valves and start engine. Check
valves for leaks.
WARNING:
Wear safety glasses to prevent eye
injury from expelled moisture. Open
drain valves slowly as moisture will be
expelled under high pressure.
NOTE:
Both air tanks have a pressure
relief valve which is set to release at
approximately 150 psi.


090319
Air governor is
located next to the
air compressor
090404
Representation of
air supply system
090435c
Rear tank drain: located next to
rear hitch
Tank drains located
roadside in the engine
compartment
Air leveling
tank drain
Air tank dry
side drain
Air tank wet
side drain &
system fill.
Universal
accessory air
fitting
090435h