COATS 9010 AX/EX Tire Changer - Manual (Page 12)

AD: Wheels with an asymmetrical hump have a
larger "ledge" type hump around the wheel except at
the valve hole making them more difficult to mount
and demount (Figure 23).
Figure 23- Asymmetrical Hump Wheel
AE: Some wheels have a low pressure
sensor/transmitter strapped to the wheel, others
have a sensor mounted directly to valve stem. This
is especially true on run-flat tire/wheel systems. The
sensor is positioned directly opposite from the valve
stem. To avoid damaging the sensor, always loosen
the top bead with the valve stem at the 2 o’clock
position first, then loosen the bottom bead at the
valve stem, then continue to loosen the remaining
circumference of the beads as necessary (Figure
24).
Figure 24 - Wheel with Low Pressure Sensor/Transmitter
3. Loosen bottom bead, starting with valve stem
positioned at the 2 o’clock position above the
bead loosener shoe (Figure 25).
Figure 25 - Loosen Bottom Bead
4. Liberally lubricate the bottom bead of the tire
(Figure 26).
Figure 26 - Lubricate Bottom Bead
5. Clamp the wheel to the table top as described in
items AB and AC on page 9. Always clamp
custom wheels from the outside.
6. Lubricate upper bead liberally. Use the R.H.
helper roller to help push the tire bead down so
bead area is easier to reach for lubrication
(Figure 27).
Figure 27 - Lubricate Upper Bead
7. Move tower forward into place and adjust as
described on page 4, steps 7, 8, and 9. Locate
the valve stem directly under the demount head
before proceeding (Figure 28).
Figure 28 - Position Valve Stem Under Demount Head
8. Using the R.H. helper roller to hold bead down,
insert bead lifting tool between knob on
demount tool and tire bead. Assist the bead
down opposite the demount head by using the
L.H. helper shoe on the tire side wall. Raise the
R.H. helper roller up and pull the lifting tool
down over the wheel to lift bead up and over the
knob on demount head (Figure 29).
10 • 9010 Rim Clamp Tire Changer
Valve Stem
Sensor
Valve Stem
Demount Head
Valve Stem
Smooth
Hump
At
Valve
Hole
Ledge
Hump
Rest of
Wheel
Figure 29 - Insert
Bead Lifting Tool