INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 27 of 66
• Mount the grippers in the lowest point (6 o’clock)
outside the second bead.
• Move to work position
C
(
Fig.
_
6
).
• Turn the mandrel 90° clockwise until the grippers
are at 9 o’clock.
• Move the tool forward until the axis of the reference
notch matches that of the external edge of the rim
at about 5 mm from the rim itself (
Fig.
_
21
). Begin
clockwise rotation making sure that, after a 90° turn,
the second bead begins to slide in the rim groove.
Turn until the grippers reach the lowest point (6
o’clock). The second bead should now be inserted
in the rim.
• Move the tool away from the wheel, turn it over into
“out of work” position and remove the grippers.
• Lower the mandrel until the wheel rests on the
footboard.
• Move to work position
A
(
Fig.
_
6
).
• Close the mandrel jaws completely, making sure the
wheel is held up to avoid dropping.
MAKE SURE THAT THE WHEEL’S
HOLD IS SECURE TO AVOID IT
FALLING DURING REMOVAL. FOR
HEAVY AND/OR VERY LARGE
WHEELS USE AN ADEQUATE LIFT-
ING DEVICE.
• Translate the movable footboard to release the wheel
from the same mandrel.
12.7 Tyres with inner tube
12.7.1 Bead breaking
REMOVE THE LOCK NUT OF THE
INNER TUBE VALVE TO ALLOW
ITS EXTRACTION DURING TYRE
REMOVAL PHASES; REMOVE
THE NUT WHEN DEFLATING THE
TYRE.
The beading procedure is the same one described for
tubeless tyres.
WHEN BEADING WHEELS WITH
INNER TUBES, INTERRUPT THE
FORWARD MOVEMENT OF THE
BEADING DISC AS SOON AS THE
BEADS HAVE BEEN DISLODGED
TO AVOID DAMAGE TO THE INNER
TUBE OR TO THE VALVE.
12.7.2 Demounting
THROUGHOUT TYRE MOUNT-
ING/DEMOUNTING OPERATIONS,
CHECK THAT THE SELF-CEN-
TRING CHUCK CLAMPING PRES-
SURE IS CLOSE TO THE MAXIMUM
OPERATING VALUE (150 BAR).
• Tilt up tool holder arm, unhook it and lift it placing
it in “out of work” position (
Fig.
_
15 ref.
_
1
); use the
handle control to position the tool holder arm on
the outer side of the wheel then place it in “working”
position (
Fig.
_
14 ref.
_
1
) and secure with the coupling
lever provided (
Fig.
_
1-2 ref.
_
8
).
PAY ATTENTION WHEN REPOSI-
TIONING THE TOOL HOLDER ARM
TO AVOID CRUSHING HANDS.
ALWAYS MAKE SURE THAT THE
ARM IS CORRECTLY HOOKED TO
CARRIAGE.
• Carry out the tools holder head 180° rotation, accord-
ing to the descriptions in the relevant paragraph, in
order to insert the hook between the rim edge and the
tyre bead; the operation must be carried out during
mandrel rotation.
• Move the rim away from the tool by about 4-5 cm
to avoid possible unhooking of the bead from the
same tool.
• Translate the hook tool outwards until the reference
notch matches the external edge of the rim.
• Move to work position
A
(
Fig.
_
6
).
• Insert lever (
Fig.
_
33 ref.
_
1
) between the rim and the
bead on the right-hand side of the tool.
Fig.
_
33
NAV11N - NAV11NT
NAV11EI - NAV11TEI
7505-M001-3_B
