COATS 9024E Tire Changer - Manual (Page 10)

6 • Important: Always read and follow the operating instructions.
9. Check duckhead ® positioning. Duckhead should
be positioned with 1/8 to 3/16-inch clearance between
the top of the rim edge and the bottom of the duck-
head, and 1/8 to 3/16-inch clearance between the top
of the rim edge and the duckhead roller. This clearance
will be maintained as long as the slide locking valve
remains locked. The operator may move the tower back
out of the way and back into place again without need-
ing to reposition the duckhead (when clamping a like
set of wheels).
H. The tool clearance may change with machine use
and should be inspected often. Failure to maintain the
proper clearance may result in damage to the wheel
rim and/or tire.
K. Normal tabletop rotation for demounting is clock-
wise. Depress the tabletop pedal to rotate this direc-
tion. To rotate the tabletop counterclockwise, lift the
pedal up with your toe.
L. Tabletop rotation can be stopped at any time by
removing your foot from the rotation pedal.
At times during the mounting and
demounting procedure, the bead lifting tool
may encounter resistance and can be
thrown. Keep one hand firmly on the tool to
avoid possible tool disconnect. Use the
reversing feature to back out of jam-ups. A
thrown tool can cause injury.
10. Apply tire manufacturer’s approved rubber lubri-
cant liberally to entire circumference of both beads
after loosening and placing on tabletop. Using R.H.
helper to hold down top bead while rotating wheel will
make lubrication easier (figure 9).
Figure 9 - Apply Rubber Lubricant to the Beads
11. Insert smooth curved end of the bead lifting tool
over the clockwise end of duckhead and below the
upper bead of the tire. Lift the bead up and over the
knob on the duckhead (figure 10). Also, note the valve
stem position to the duckhead, this position reduces
stresses in the bead and allows an easier bead lift.
Push down on the tire opposite the duckhead to allow
the bead utilize the drop center area of the rim.
Figure 10 - Insert Bead Lifting Tool
12. Depress the tabletop pedal to rotate the wheel.
The duckhead will guide the tire bead up and over the
edge of the wheel (figure 11). Continue rotation until
the upper bead is demounted.
Figure 11 - Demount Upper Bead
13. For lower bead removal lift the tire (figure 12)
and insert the lift tool same as on upper bead (figure
13). On large or heavy tires, the helper arms may be
used to lift the tire.
Figure 12 - Lift the Tire for Lower Bead Removal
CAUTION
Valve Stem