COATS 7665 AX/EX Tire Changer - Manual (Page 5)

OPERATING INSTRUCTIONS
The 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 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 instructions near the machine for easy
reference.
BEAD LOOSENING AND DEMOUNTING
This machine may operate
differently from machines
you have previously oper-
ated. 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 back side of wheel may
cause the wheel to be clamped unlevel. This may
result in the combination mount/demount head con-
tacting the rim causing scratches. On alloy wheels,
always rotate the wheel one turn after setting the
head to insure proper wheel chucking.
B. Always review nicks and scratches with owners of
expensive wheel and tire combinations prior to ser-
vicing.
C. Review the performance wheel section of this
manual prior to servicing performance tire/wheel
combinations.
1. Deflate tire completely by removing the valve
core from the valve stem (Figure 1).
Figure 1 – Remove Valve Core to Deflate Tire
NOTE: Loosening the beads on a partially or
fully inflated tire is unsafe and causes excess move-
ment and friction against the bumper pads and
excessive wear on pivots. Deflate the tire completely
to prolong the life of your machine.
D. Always loosen the bead on the narrow side of the
wheel’s drop center first. See Figure 4 for more
information on the drop center.
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 posi-
tioning 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.
Position the bead loosener shoe against the tire
next to, but not on, the rim. Press the button on
the bead loosener shoe handle to actuate the
shoe and loosen the bead. It may be necessary
to loosen the bead in multiple locations around
the tire (Figure 2).
Figure 2 – Position Tire and Bead Loosener Shoe
3. Turn wheel around and repeat loosening pro-
cedure on the other side of the wheel. This
should be the long side of the drop center (see
Figure 4).
G. It will be easier to clamp the wheel to the table
top if the lower bead is loosened last.
4. Apply tire manufacturer’s approved rubber lubri-
cant liberally to entire circumference of both tire
beads after loosening (Figure 3).
Figure 3 – Apply Rubber Lubricant to Tire Beads
7660/7665AX/EX Rim Clamp Tire Changer • 3
CAUTION
Valve Stem