INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 31 of 66
12.8.1 Beading and demounting
NEVER STAND IN FRONT OF THE
WHEEL WHILE THE INFLATION
RING IS BEING EXTRACTED FROM
THE BEAD WIRE, SINCE IT MAY BE
EJECTED VIOLENTLY, CAUSING
SERIOUS INJURIES OR WOUNDS.
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).
• Mount the wheel on the mandrel as described in
“WHEEL CLAMPING” and make sure it is deflated.
• Move to work position
D
(
Fig.
_
6
).
• Place the tool arm in “working” position (
Fig.
_
14
ref.
_
1
) in the tyre inner side, and make sure it is
locked by the provided coupling lever (
Fig.
_
1-2
ref.
_
8
).
• Position the beading disc on rim edge (see
Fig.
_
41
).
Fig.
_
41
• Turn the mandrel and smear the entire bead seat
of the rim with lubricant. While doing this, jerk the
beading disc forward until the first bead is removed
(as these wheels feature inner tubes, carry out the
operation carefully, paying special attention to when
the bead dislodges, trying to stop disc advancement
immediately to avoid compromising the integrity of
the inner tube and valve).
• Place the tools holder arm in “off- work” position
(
Fig.
_
15 ref.
_
1
); operate the handle control in order
to position the tools holder arm on the wheel outer
side, then place it in “working position” (
Fig.
_
14
ref.
_
1
) again and lock it with the coupling lever
provided.
• Carry out the tools holder head 180° rotation accord-
ing to the description of the relevant paragraph, in
order to let the beading disc come into contact with
the tyre outer side (see
Fig.
_
42
).
Fig.
_
42
• Turn the mandrel and smear the entire bead seat of
the rim with lubricant.
• While doing this, jerk the beading disc forward until
the first bead is removed.
• Repeat the operation, making the beading disc move
forward (see
Fig.
_
43
) until the stop ring is released
(
Fig.
_
43 ref.
_
1
). It will be then extracted through
lever (
Fig.
_
43 ref.
_
2
).
Fig.
_
43
• Remove the bead wire.
• Remove the O-Ring, when featured.
• Tilt up tool holder arm placing it in “off-work” posi-
tion (
Fig.
_
15 ref.
_
1
) after it has been unlocked.
• Lower the mandrel until the wheel rests on the
footboard.
• Move to work position
B
(
Fig.
_
6
).
• Translate the mobile footboard outwards until the
tyre is completely dislodged from the rim (in case of
tyres with inner tube, make sure that the valve hasn’t
been damaged during removal).
NAV11N - NAV11NT
NAV11EI - NAV11TEI
7505-M001-3_B
