AIR SYSTEM
WARNING!
Never attempt to disassemble a com-
ponent until you have read and un-
derstood recommended procedures.
Some components contain power
-
ful springs and injury can result if
not properly disassembled. Use only
proper tools and observe all precau
-
tions pertaining to use of those tools.
Failure to comply may result in death,
personal injury, equipment or property
damage.
Completely bypassing a Bendix®
AD-IS air dryer will bypass the sys
-
tem’s pressure protection valves. This
could lead to loss of air pressure or
damage to the vehicle’s air system,
which could cause an accident involv
-
ing death or personal injury. Always
adhere to the manufacturer’s proce
-
dure if it is necessary in an emergency
to temporarily bypass an AD-IS-series
air dryer. Failure to comply may result
in death, personal injury, equipment or
property damage.
WARNING!
The operation of the vehicle’s braking
system and many vehicle accessories
depends upon the storage and
application of a high-pressure air
supply.
Your
vehicle’s compressor takes
outside air and compresses it, usually
to 100-120 psi (689-827 kPa). The
compressed air then goes to the
reservoirs to
be stored until needed.
When you operate your air brakes, the
stored compressed air ows into the
chambers where it is used to apply
your truck and trailer brakes. That is
why, when you push down on your
brake pedal, you don’t feel the same
amount of pressure on the pedal that
you do when you apply the brakes on
your car. All you are doing on your
truck is opening an air valve to allow
air to ow into the brake chambers.
Contamination of
the air supply system
is the major cause of problems in
air-operated components such as
brake valves, and suspension height
control valves. To keep contaminants
to the lowest possible level, follow
these maintenance procedures.
5
(04/13) Y53-6047–2C 5-49
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