(7) 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 com-
bination mount/demount head contacting the rim causing
scratches. On alloy wheels, always rotate the wheel one turn
after setting the Mounting head to insure proper wheel
chucking.
B.
Always review with the owner any nicks and
scratches on expensive wheel and tire combinations prior to
servicing.
C.
Review the custom and special wheel section of this
manual prior to servicing custom or special tire/wheel com-
binations.
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 introduced into the tire
at some time
.
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
Figure 1 - Remove Valve Core to Deflate Tire
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
loosening.
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. 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 necessary
to loosen the bead in multiple locations around the tire
(figure 3).
3. Turn the wheel around and repeat loosening procedure
on the other side of the wheel (figure 4). This should be the
long side of the drop center (figure 2).
Figure 3 - Position Tire and Bead Loosener Shoe
