COATS 4070 Tire Changer - Manual (Page 7)

Important: Always read and follow operating instructions. • 3
Operating Instructions
The unit must be properly operated and properly
maintained to help avoid accidents that could damage
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 instruc-
tions near the machine for easy reference.
Tire Bead Loosening and Demounting
CAUTION
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.
NOTE: Always review nicks and scratches with own-
ers of expensive wheel and tire combinations prior to
servicing.
IMPORTANT: Refer to the Performance Wheels and
Tires section of this manual before servicing custom
and performance wheel and tire combinations.
IMPORTANT: Refer to the Tube Type Tires section of
this manual before servicing tires with tubes.
1. Determine the correct side of the wheel for tire
removal. Remove the tire from the narrow side (tire
mounting side). Tire will not mount or demount from
the long side.
NOTE: On some wheels, the sides may be nearly
equal. Measure carefully. Only the narrow side is used
for mounting and demounting.
Figure 1 - Determining Tire Mounting Side
2. Remove the valve core and allow all of the air to
escape from the tire. Remove all weights from rim.
.
3. Place the tire/wheel assembly over the center post
and down onto the contoured table top, with the narrow
side of bead seat up (figure 1)The positioning pin must
engage a lug hole in the wheel. Position the tire/wheel
assembly so that the valve stem is on the operator’s
side of the machine.
NOTE: Make fine adjustments to the lower bead
loosener shoe with the shim kit before placing mag or
alloy wheel assemblies on the table top. Refer to the
instructions on bead loosener shoe.
4. Thread centering cone clockwise onto the center
post. As the tapered end enters the center hole of the
wheel, the tire/wheel assembly will adjust itself on the
table top. Be sure the cone is hand tight and is centered
in the wheel’s center hole (Fig. 2).
Figure 2 - Thread the Centering Cone onto the Center Post
5. Check the detent control knob for proper setting.
Forward is used for all tire and wheel combinations
except 15” x 4” , 16” x 5” to 7” , and 17.5” x 5.5” to 7.5”.
To move the detent lever, push the knob down, move it
to the proper setting, and release the knob (fig. 3).
Figure 3 - Positioning the Detent Control Knob
Narrow Side
Drop Center
Long Side