CEMB SM628BPS Manuel D'utilisation page 19

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bead is not excessively stretched and can
easily move onto the mount/demount tool.
4) Use the lever to move the bead over the
lip of the mount/demount tool.
5) Raise the accessory arm and rotate it
outwards to free the work top and then ro-
tate the turntable to remove the first bead.
Bring the operating arm of the tyre changer
in non-working position. From this moment,
the operating arm will not be used for the
disassembling operations anymore.
6) When demounting the second bead, the
bead usually sticks to the lower edge of the
rim. In this event, use the rollers (07, fig. 8)
for bead breaking .
Proceed in the following way:
a) bring the arm (10, Fig. 8) in non-working
position.
b) position both the rollers in contact with
the lower edge of the rim (Fig. 13) and
clamp the rollers holder arm by tighte-
ning the relative grip. Lift the rollers
up, with the help of the control lever
, until the roller of smaller
section makes a release towards the
internal side of the rim.
c) rotate the turntable clockwise simulta-
neously lifting the rollers up, with the help
of the control lever
bead-breaking procedure is completed.
Moreover, the rollers (07, Fig. 8) facilita-
tes demounting of the second bead, in
particular in case of racing wheels with
large track. Lift the second bead up
(see Fig. 14) and bring it approx. 2 cm
beyond the upper edge of the rim (Fig.
14). During this operation, use the right
hand in a position diametrically opposite
the rollers, to raise the tyre and keep pressed the second bead to the inside of the
centre well. This operation ensure that the roller of bigger section can get out from the
upper edge of the rim (the roller having the smaller section will be locked under the
User's manual
, until the
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