COATS 9024E Tire Changer - Manual (Page 8)

4 • Important: Always read and follow the operating instructions.
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 reviews
basic operations and use of controls. These instruc-
tions should be reviewed with all employees 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 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 combinations
prior to servicing.
C. Review the performance wheel section of this
manual prior to servicing performance 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 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. See figure 2 for more infor-
mation on the drop center.
Figure 2 - Determine Narrow Side of Wheel
E. The clamps on the tabletop may extend beyond the
tabletop 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 loosener 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).
Figure 3 - Position Tire and Bead Loosener Shoe
3. Turn the wheel around and repeat loosening pro-
cedure on the other side of the wheel (figure 4). Note
that the valve is placed at 2 o’clock for the initial loos-
ening procedure to accommodate a possible asym-
metric safety hump type rim.
CAUTION
CAUTION
CAUTION
Narrow Side
Long Side
Drop Center
Va
lve Stem