International Trucks ProStar+ Eagle Series., Operator'S Manual

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Operation
occurs in one system, the remaining system continues to
provide braking action.
When a failure is detected the air dryer is provided with a limp
home feature to allow the vehicle to be driven to a service center.
If vehicle has been parked for an extended period in cold
weather, always check to be sure all wheels are rolling free
(brakes are not frozen) when starting out.
Always clean
accumulated ice and snow from brake linkage.
Air Gauge, Low Air Pressure Beeper and Warning Indicator
WARNING
To prevent loss of vehicle braking or control
resulting in property damage, personal injury, or
death, never operate the vehicle when insufficient
air pressure (less than 60 psi [414 kPa]) is
indicated for either the primary or secondary air
system. The volume of air required to stop the
vehicle may be greater than that available. Have
the brake system checked and repaired before
returning the vehicle to service.
Should air pressure in either section of the split air brake
system be reduced to 60 to 76 psi (414 to 524 kPa) the warning
beeper will sound and the red BRAKE PRESSURE warning
indicator, on the instrument panel, will glow.
Also, the air
gauge/gauges will indicate low air pressure in at least one of the
independent systems. The warning beeper and red indicator
will automatically shut off when the air pressure in both systems
is sufficient (approximately 55 to 76 psi [379 to 524 kPa]) to
operate the vehicle.
Should the red indicator and beeper not shut off soon after
start-up, the air pressure gauge/gauges should also indicate at
least one section of the split system has low air pressure. If the
red indicator, beeper and gauge indicate a loss of pressure while
driving, the vehicle still has a portion of the braking capability,
because one-half of the split system braking capability is
retained. However, the distance required to stop the vehicle will
be increased.
Reservoir Moisture Draining
The Bendix AD-IS® air dryer automatically drains the wet tank.
Daily draining is not required.
Moisture taken in with the air through the compressor inlet
valves collects in the reservoirs and necessitates draining each
reservoir periodically. This is done by opening the drain cocks
located at the end of all tanks (optional pull-cable operated drain
valves may be present). If the drain cock is opened in the end
of the tank, there must be some air pressure in the system to
assure proper drainage. Be sure to close the drain cocks after
all moisture has been expelled.
On vehicles so equipped, the reservoir automatic drain valve
ejects moisture and contaminants from the reservoir in which it
is connected. It operates automatically and requires no manual
assistance or control lines from other sources. The reservoir
should be drained and the valve should be examined periodically
to ensure that the drain passage is not obstructed.
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