operators_manual

NOTE
Review the warranty policy before per-
forming any maintenance procedures.
An extended warranty may be voided
if unauthorized maintenance is per-
formed during this period.
Bendix® AD-IS Series Air Dryer
Your vehicle may be equipped with a
Bendix® AD-IS series air dryer. Any air
dryer replacement should be made with an
identical component.
WARNING
Use of an air dryer brand or model that
differs from what was originally instal-
led could cause the air system to not
perform correctly unless the full air
system design is reviewed and modifi-
cations are made to comply with Fed-
eral Motor Vehicle Safety Standard
(FMVSS) 121 Air Brake Systems. Fail-
ure to abide by this warning and main-
tain compliance with FMVSS 121
could cause loss of vehicle control and
may lead to death or serious personal
injury.
The AD-IS Series air dryer has
incorporated into its design various
components that have typically been
installed separately on the vehicle (see
below for components/areas affected):
• Pressure protection valves
• Safety valve
• Governor and plumbing
• Plumbing of the front and rear
service air tanks
• Plumbing to accessory systems
These components are required to meet
the Federal Motor Vehicle Safety
Standards (FMVSS 121 - Air Brake
Systems). As the Warning above states,
any other type of air dryer installed in the
place of an AD-IS Series will require
changes, modifications and/or additions to
your vehicle’s air system to maintain
compliance with FMVSS 121.
Air Tanks
Air tanks on the vehicle act as a reservior
for the air system to use without running
the air compressor all of the time. These
air tanks require maintenance to keep
them operational.
WARNING
If the supply and service air tanks are
not drained at the recommended fre-
quency, water could enter the air lines
and valves. This could cause corrosion
or blockage, which could compromise
the brake system safety and potential-
ly cause an accident. Failure to comply
may result in death, personal injury,
equipment or property damage.
CAUTION
DO NOT use penetrating oil, brake flu-
id, or wax-based oils in the air system.
These fluids may cause severe dam-
age to air system components.
MAINTENANCE - Air Tanks
Y53-6047-2HEN (03/18) 211
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