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6. SUSPENSION OPERATION
The BUSHTEC air suspension should be inflated so as to maintain a constant vertical
alignment of the wheel with the road surface, regardless of pressure. As your cargo loads
change, it may be necessary to increase or decrease the suspension air pressure and roll
the trailer to determine the correct wheel alignment.
Operation: Inflate the suspension so that the wheels are in the “positive camber” position
(wheels cambered out at top). Place cargo load inside trailer, establishing proper tongue
weight. While walking the trailer forward simultaneously release air until the wheels are
properly aligned. On Roadstar, Quantum, Quantum “GL”, and most Turbo+2 models,
proper wheel alignment is achieved with a straight up wheel alignment, or neutral
camber. On Turbo+2 models equipped with the Aerowing aerodynamic lid wing, proper
alignment is achieved when the wheels are
slightly
cambered out at the top to account for
downforce generated by the Aerowing at speed (2-4 degrees).
Top pair shows positive
camber.
Center pair shows correct
neutral camber.
Bottom pair shows
negative camber.
CAUTION:
The BUSHTEC air suspension is a high pressure/ low volume system and
should NEVER be adjusted with gas station air systems. These systems typically run
unregulated line pressure, making it difficult to control airflow. We recommend the use
of the PROGRESSIVE AIR PUMP with GAUGE, available from BUSHTEC.
NOTE:
Always roll the trailer after inflation changes to determine the motive position of
the wheels. Pressure is an irrelevant measure of suspension inflation, and should only be
used for a reference. The suspension system is capable of 150 PSI.
WARNING:
OPERATION OF THE TRAILER WITHOUT SUFFICIENT
SUSPENSION AIR PRESSURE (NEGATIVE CAMBER) MAY CAUSE DAMAGE
