Aston
®
Tire Changer ATC-5733 User’s Manual
18
www.astontechusa.com
positioning a tire for bead loosening.
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Pull the bead breaker blade away from the machine and roll the wheel into position. If
servicing a performance wheel or any other wheel with Tire Pressure Sensor), make sure
that the valve stem is either in the 12 o’clock or 6 o’clock position.
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Position the bead breaker blade against the tire next to, but not on, the rim or the sidewall
of the tire. Press the breaker pedal to actuate the blade and loosen the bead. It may be
necessary to loosen the bead in multiple locations around the tire. Use extra care in
positioning the bead breaker blade on larger wheels/tires, and on alloy wheels.
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Turn wheel around and repeat procedure on the other side of the wheel. This should be
the long side of the drop center. It will be easier to clamp the wheel to the table top if
the lower bead is loosened last.
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Determine the mounting side of the wheel. The mounting side is the narrow side of the
drop center.
