Navistar WorkStar Series, Operator'S Manual

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Operation
NOTE: The system will automatically switch from DUMP to
SUSP if, while the system is commanding a DUMP operation,
the vehicle speed exceeds 5 mph (8 km/h). Once this occurs,
the only means to deflate the suspension will be to slow the
vehicle to 5 mph (8 km/h) and recycle the SUSP/DUMP switch
to the DUMP position.
• When the SUSP/DUMP switch is pushed to the DUMP
position, the system releases air from the air suspension
bag. The switch indicator comes on and remains on while
the suspension is being lowered.
• When the SUSP/DUMP switch is pushed to the SUSP
position, the system fills the air suspension bag, which
raises the vehicle. The switch indicator will then turn off.
Air Suspension System Faults
• The instrument panel gauge cluster will issue an audible
10-beep alarm whenever the driver pushes the DUMP
position of the SUSP/DUMP switch and the vehicle exceeds
5 mph (8 km/h).
• The SUSP/DUMP switch indicator will blink rapidly in the
event of a system component failure or a bad system
signal status when the SUSP/DUMP switch is in the DUMP
position.
• The SUSP/DUMP switch indicator will blink slowly in the
event of a system command fault, regardless of the position
of the SUSP/DUMP switch.
Axle and Suspension Conversions
WARNING
When operating a loaded vehicle, always keep all
adjustable axles in the down position supporting
their share of the load.
Failure to do so can
overload other axles, tires, wheels, springs,
brakes, and frames, causing early component
failure and loss of vehicle control, which could
result in property damage, personal injury, or
death.
Axle and suspension conversions are not recommended or
approved; however, on occasion, aftermarket add-on axles
and suspensions are installed by others on International truck
chassis, which allow operator control for weight transfer from
other axles (i.e., air lift axles).
Lift Axle Options
WARNING
To prevent the unintentional lowering of a lift
axle(s), set all UP/DOWN switches to the UP
position before turning system on.
Be aware,
lift axle(s) will automatically rise to the UP
position when the key is turned off. Ensure lift
axle(s) are clear of people, animals and objects
before turning system on, or turning ignition off.
Failure to follow this warning may cause property
damage, personal injury, or death.
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