8 • Important: Always read and follow operating instructions.
Narrow Side
Drop Center
Long Side
Operation Instructions
This unit must be properly operated and properly
maintained to help avoid accidents that could dam-
age the unit and injure the operator or bystanders.
This section of the Operation Instructions manual
reviews the basic operations and use of controls.
These instructions should be reviewed with all employ-
ees before they are allowed to work with the machine.
Keep these instructions near the machine for easy
reference.
Bead Loosening and Demounting
This machine may operate dierently from
machines you have previously operated.
Practice with a regular steel wheel and tire
combination to familiarize yourself with the
machine’s operation and function.
Remember to remove all weights from both
sides of the wheel. Weights left on backside of
wheel may cause the wheel to be clamped
unleveled. This may result in the Duckhead
®
mount/demount tool contacting the rim caus-
ing scratches. On alloy wheels, always rotate
the wheel one turn after setting the mount/
demount tool to insure proper wheel chucking.
Always review with the owner any nicks and
scratches on expensive wheel and tire combi-
nations prior to servicing.
Loosening the beads on a partially or fully
inflated tire is unsafe and causes excess
movement and friction against the bumper
pads and excessive wear on pivots. Deflate
the tire completely to prolong the life of your
machine.
1. Deflate the tire completely by removing the valve
core from the valve stem (figure 4). Be cautious and
do not smoke as a flammable gas could have been
introduced into the tire at some time.
Figure 4 - Remove Valve Core to Deflate Tire
Tires are always installed and removed from
the rim’s narrow side.
Always loosen the bead on the narrow side of
the wheel’s drop center first (tire removed in
figure 5 for clarity).
Figure 5 - Determine Narrow Side of Wheel
The clamps on the table top may extend
beyond the table top itself. To avoid damaging
the clamps, move them to their full inward
position before positioning a tire for bead
loosening.
Use extra care in positioning the bead loosener
shoe on larger wheels/tires, and on alloy
wheels. Make sure the shoe rests next to but
not on the rim, and not on the tire sidewall.
2. Pull the bead loosener shoe away from the
machine and roll wheel into position. The valve stem
should be in the 2 o’clock position to accommodate a
possible asymmetric safety hump type rim. Position
the bead loosener shoe against the tire next to, but
not on, the rim. Press the bead loosener foot pedal to
actuate the shoe and loosen the bead. It may be nec-
essary to loosen the bead in multiple locations around
the tire (figure 6).
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