COATS Extended Mobility (EMT) RunFlat Tires - Manual (Page 16)

D–2 Bead Loosening
5 Loosen the upper bead, making sure not to over com-
press the tire. Allow the shoe to move the tire to a posi-
tion just past the safety hump and then release. Do not push
the tire any farther into the wheel.
The tire in the photo is compressed too far (as represented
by the white arrow). The black arrow and line represent the
point to which the tire should be compressed.
6 Turn the tire and wheel around and reposition to loosen
the lower bead. Position the valve stem towards the top
of the bead loosener shoe.
Do not over compress the tire. Allow the shoe to move the
tire to a position just past the safety hump and then release.
Loosening the lower bead may require multiple attempts at
different locations around the wheel. Always make the first
attempt with the valve stem positioned as shown here, then
move to other locations.
7 Wheels with an asymmetrical safety hump can be bead
loosened only at the valve stem. This is true for both
upper and lower beads. Note the difference in the safety
hump at the valve stem and at a position 180° away from the
valve stem.
8 Rotate the tire changer table top to position the clamps
at 12, 3, 6, and 9 o’clock positions (when viewed from the
front of the machine).Move the clamps out to their fully
extended position.
9A Lift the tire and wheel onto the table top…
9B …and position the wheel rim into the rear clamp.
Lower the wheel and move the clamps into position
to clamp the wheel externally. Always clamp the wheel
externally when mounting and demounting EMT tires.
This completes Section D
.
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