COATS 4070 Tire Changer User Manual

Page 8

4 •

Important: Always read and follow operating instructions.

Place the upper bead loosener shoe on the tire

next to, but not on, the rim (fig. 4). Press down on the

foot pedal until both bead looseners complete their

full stroke. If the top bead is not completely loosened,

release the foot pedal until the unit has completed the

full return stroke and press the foot pedal again. The

ratchet effect on the loosener will deliver a deeper

stroke. The repeat cycle is used only if the upper bead

is not loosened.

Figure 4 - Positioning the Upper Bead Loosener Shoe

Note: If may be necessary to loosen the bead at differ-

ent points around the wheel circumference to entirely

free the bead.

Once the tire beads have been loosened from the

bead seat of the wheel, lubricate the beads liberally

with rubber lubricant (fig. 5).

Note: Rubber lubricant makes demounting easier,

helps eliminate damage to the tire beads, and assists

the movement of the combination tool.

Figure 5 - Lubricate Tire Beads

Position the combination tool so that it aligns with

the center post key. Insert the demount end of the tool

between the tire and rim. Push the tool down towards

the center post as shown in figure 6 to lift the tire bead

over the rim.

IMPORTANT: Make sure the tool is oriented as shown

in figure 6.

Figure 6 - Align, Insert, and Push Down on the Tool

Continue to push down on the tool until the center

post key protrudes through the slot in the tool and the

tool stops against the shoulder of the key. The tool is

now positioned properly for operation of the center post

key (figure 7). Keep a firm hold on the tool at all times to

prevent accidental disconnect.

Figure 7 - Tool Properly Positioned

10.

Press down on the foot pedal. The counterclock-

wise rotation of the center post key and combination

tool will remove the upper tire bead from the rim. Lifting

up on the tire with the left hand as shown by the arrow

in figure 8 helps in demounting tougher tires.

Figure 8 - Removing Upper Bead

11.

To remove the lower bead from the wheel, repeat

steps 8, 9, and 10.