COATS 7xxx Series Tire Changer - Manual (Page 22)

18 • Important: Always read and follow operating instructions.
Figure 36 - Insert Bead Lifting Tool
8a. Place the helper foot opposite the demount tool
and push the bead into drop center (figure 36A).
Figure 36A - Helper Foot Pushing Bead Into Drop Center
9. Rotate lifting tool down over wheel to lift bead up
and over the knob and at the same time remove helper
foot (figure 37).
Figure 37 - Rotate Lifting Tool Down for Demount
10. Hold lifting tool in place, depress the table top
rotation pedal momentarily to jog the wheel a short
distance. Check the wheel and tire to verify that opera-
tion is not causing damage. The lifting tool can usually
be removed after jogging the wheel a short distance.
Continue to jog the wheel to allow the tire sidewall to
flex as it crosses the rim edge. Continue short rotations
until top bead is completely demounted (figure 38).
Figure 38 - Rotate Lifting Tool Down for Demount
11. Demount lower bead. In most cases when
demounting performance tires, the lower bead will be
less difficult. Pay close attention to sensor/transmitter
location, and position it just before the demount tool
when starting the lower bead demount procedure
(figure 39).
Figure 39 - Rotate Lifting Tool Down for Demount
12. Use the upper side of the helper foot to hold the
bead in drop center while lifting the lower bead over the
demount tool (figure 40). Hold the lifting tool in place
and remove the helper foot. Depress the table top rota-
tion pedal momentarily to jog the wheel short distances
to complete the demounting process.
Figure 40 - Helper Holding the Lower Bead in Drop Center