Peterbilt 579 Operator's Manual page 288

AIR SYSTEM
•
In areas where more than a 30°
F (17° C) range of temperature
occurs in one day, small amounts
of water can accumulate in
the air brake system due to
condensation. Under these
conditions, the presence of small
amounts of moisture is normal
and should not be considered as
an indication that the dryer is not
performing properly.
•
An outside air source has been
used to charge the air system.
This air did not pass through the
drying bed.
5
5-52
Overhaul
Maintenance intervals typical for
on-highway operation would be 2 - 3
years, 350,000 miles or 10,800 hours.
Maintenance intervals typical for high
duty cycle usage such as transit bus,
refuse hauler, dump truck, cement
mixers and off-highway operation
would be 1 year, 100,000 miles or
3,600 hours.
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.
Y53-6047–2C
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!
If a different air dryer brand or model is
installed on the vehicle other than what
was originally installed, it could cause
the air system to not perform correctly
unless the full air system design is
reviewed and modifications made to
comply with Federal Motor Vehicle
Safety Standards (FMVSS) 121 - Air
Brake Systems. Failure to abide by
this warning and maintain compliance
to 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
(04/13)