COATS 7665 AX/EX Tire Changer - Manual (Page 13)

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 operation 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 30).
Figure 30 - Holding Lifting Tool in Place and Rotate Wheel
11. Demount lower bead. In most cases when
demounting performance tires, the lower bead
will be less difficult. Pay close attention to sen-
sor/transmitter location, and position it just
before the demount tool when starting the lower
bead demount procedure (Figure 31).
Figure 31 - Sensor/ Transmitter Location
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 32). Hold the lift-
ing tool in place and remove the helper foot.
Depress the table top rotation pedal momentari-
ly to jog the wheel short distances to complete
the demounting process.
Figure 32 - Helper Holding the Lower Bead in Drop Center
Performance Tires and Wheels - Mounting
1. Lubricate both tire beads liberally. Performance
tires will require more lubrication than standard
passenger car tires.
2. Mount the lower bead. In most cases, the lower
bead will mount easily.
AF: Mounting the top bead can be very difficult when
mounting new tires on performance and custom
wheels. Proceed slowly and cautiously.
3. Position the valve stem 90 degrees clockwise in
front of the mount/demount tool for top bead
mounting. Lift the bead over the rear of the
mounting head. Use the helper tool to hold the
bead in the drop center (Figure 33). Rotate the
wheel in short steps and apply extra lubricant to
mount upper bead.
Figure 33 - Mount Upper Bead, Use Helper
4. On extremely tight tire and wheel combinations,
it may be necessary to use the bottom of the
helper foot to flip the tire bead over the rim
flange (Figure 34)
Figure 34 - Helper Foot to Flip Bead Over Rim Flange
Sensor
77050/7055/7060/7065 X/EX Rim Clamp Tire Changer • 11