Coats 4070 Tire Changer User Manual download pdf (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

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Coats 4070 Tire Changer User Manual Page 7

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