Once the wheel has been clamped onto the turntable, the hex shaft may be lowered to bring the mount/demount head to the rim’s edge.

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Tire Changer the Tire from the Wheel

Tire Changer the Tire from the Wheel

Once the wheel has been clamped onto the turntable, the hex shaft may be lowered to bring the mount/demount head to the rim’s edge.
The duckhead will rest on the outside of the flange and on the top of the wheel. The hex bar is then locked and will automatically be retracted vertically away from the wheel surface about 1/16th” or 2 mm to prevent touching the wheel while demounting/mounting. Swing arm style changers also have a large screw to move the mount head horizontally about 1/16th” or 2 mm away from the wheel flange.
Most modern steel duckheads have plastic inserts to protect the rim should the head come in contact with the wheel during the mounting process.
Complete plastic duckheads are also available.

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