INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 33 of 96
• 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. 45
).
Fig. 45
• 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. 46
) until the stop ring is released
(
Fig. 46 ref. 1
). It will be then extracted through
lever (
Fig. 46 ref. 2
).
Fig. 46
• Remove the bead wire.
• Remove the O-Ring, when featured.
• Tilt up tool holder arm placing it in “out of work”
position (
Fig. 18 ref. 1
) after it has been unhooked.
• 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).
THE REMOVAL OF THE BEADS
FROM THE RIM CAUSES THE
TYRE TO FALL. ALWAYS MAKE
SURE THAT NO ONE IS STAND-
ING BY ACCIDENT IN THE WORK
AREA.
WHEN DEMOUNTING VERY HEAVY
TYRES, IT IS IMPORTANT TO
MOVE THE WHEEL AS CLOSE AS
POSSIBLE TO THE BASE BEFORE
COMPLETING THE OPERATION.
PAY ATTENTION WHEN REPOSI-
TIONING THE TOOL HOLDER ARM
TO AVOID CRUSHING HANDS.
ALWAYS MAKE SURE THAT THE
ARM IS CORRECTLY HOOKED TO
CARRIAGE.
12.8.2 Mounting
THROUGHOUT TYRE MOUNT-
ING/DEMOUNTING OPERATIONS,
CHECK THAT THE SELF-CEN-
TRING CHUCK CLAMPING PRES-
SURE IS CLOSE TO THE MAXIMUM
OPERATING VALUE (160 BAR - 180
BAR).
• Place the tools holder arm in “out of work” position
(
Fig. 18 ref. 1
); if it has been removed, fix the rim
to the mandrel as described in “WHEEL CLAMPING”
paragraph. If the wheel features an inner tube, posi-
tion the rim with the valve slot facing downwards
(at 6 o’clock).
• Lubricate the entire bead seat of the rim and the
tyre beads.
• Move to work position
B
(
Fig. 6
).
• Position the movable footboard (
Fig. 1-2 ref. 18
)
so as to allow the upward motion of the tyre (if the
wheel features an inner tube, position the rim with
the valve slot facing downwards at 6 o’clock).
• Place the mandrel in order to centre the rim on the
tyre.
• Operate the movable footboard forward translation
in order to insert the rim in the tyre (in case of air
tube tyres, make the valve re-enter not to damage it).
Move forward until the rim is completely inserted
in the tyre.
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
