Operating Instructions
This unit must be properly operated and properly
maintained to help avoid accidents that could damage
the unit and injure the operator or bystanders. This sec-
tion of the Operating Instructions manual review basic
operations and use of controls. These instructions
should be reviewed with all employees before they are
allowed to work with the machine. Keep these instruc-
tions near the machine for easy reference.
Bead Loosening and Demounting
This machine may operate differently 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.
A. 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 combination
Duckhead®contacting the rim causing
scratches. On alloy wheels, always rotate the
wheel one turn after setting the Duckhead to
insure proper wheel chucking.
B. Always review with the owner any nicks and
scratches on expensive wheel and tire combi-
nations prior to servicing.
C. Review the performance wheel section of
this manual prior to servicing performance
tire/wheel combinations.
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 1). Be cautious and do
not smoke as a
flammable gas could have been intro-
duced into the tire at some time
.
Figure 1 - Remove Valve Core to Deflate Tire
Tires are always installed and removed from
the rim’s narrow side.
D. Always loosen the bead on the narrow side
of the wheel’s drop center first (tire removed in
figure 2 for clarity).
Figure 2 - Determine Narrow Side of Wheel
E. 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 loos-
ening.
F. 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. Actuate valve (or pull) to position 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. Actuate the
bead loosener handle/button to position the shoe or
press the bead loosener pedal to position the shoe and
loosen the bead. It may be necessary to loosen the
bead in multiple locations around the tire (figure 3).