INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 30 of 96
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.
12.7.3 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).
• Secure the rim to the mandrel according to the proce-
dure described in paragraph “WHEEL CLAMPING”.
• Adequately lubricate the tyre beads and the rim bead
seat with a suitable lubricant using the provided
brush.
USE ONLY TYRE LUBRICANTS.
SUITABLE LUBRICANTS CON-
TAIN NO WATER, HYDROCAR-
BONS, OR SILICON.
• Mount grippers (
Fig. 32 ref. 1
) on the external edge
of the rim in the highest point as shown in
Fig. 32.
THE GRIPPERS MUST BE TIGHTLY
SECURED TO THE EDGE OF THE
RIM.
• Move to work position
B
(
Fig. 6
).
• Position the tyre on the footboard and lower the man-
drel (make sure that the grippers are in the highest
point) to hook the first tyre bead (internal bead).
• Lift the mandrel arm with the tyre hooked and turn
it counterclockwise by about 15-20 cm; the tyre will
position itself sideways with respect to the rim.
• Tilt up tool holder arm, unhook it and lift it plac-
ing it in “off-work” position (
Fig. 18 ref. 1
); use
the handle control to position the tool holder arm
on the inner side of the wheel then place it in work
position (
Fig. 17 ref. 1
) and secure with the safety
hook provided.
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 to work position
D
(
Fig. 6
).
• 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 (see
Fig. 38
).
Fig. 38
• Move to work position
C
(
Fig. 6
).
• From the external side of the wheel, check the exact
position of the tool and, if necessary, correct it. Then,
turn the mandrel clockwise until the grippers reach
the lowest point (6 o’clock). The first bead should
now be inserted in the rim, therefore remove the
grippers.
• Move to work position
D
(
Fig. 6
).
• Extract the tool hook from the tyre.
• Place the tool holder arm in “out of work” position
(
Fig. 18 ref. 1
) and translate it to the outer side of
the tyre.
• Carry out the tools holder head 180° rotation, ac-
cording to the descriptions in the relevant paragraph.
• Move to work position
B
(
Fig. 6
).
• Turn the mandrel to position the hole to insert the
valve downward (6 o’clock).
• Position the movable footboard (
Fig. 1-2 ref. 18
)
directly above the wheel and lower the mandrel
until the wheel rests on the footboard. Translate
the movalbe footboard outwards to create enough
space between the tyre edge and the rim to insert
the inner tube.
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
