INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 29 of 96
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 (160 BAR - 180
BAR).
• Tilt up tool holder arm, unhook it and lift it placing
it in “out of work” position (
Fig. 18 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. 17 ref. 1
) and secure with the safety
hook 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. 36 ref. 1
) between the rim and the
bead on the right-hand side of the tool.
Fig. 36
• Keeping the lever pressed, lower the wheel until the
edge of the rim is approximately 5 mm distant from
the hook tool.
• Turn the wheel clockwise keeping lever pressed until
the bead has gone completely out.
• Move away the tool holder arm in “out of work” po-
sition (
Fig. 18 ref. 1
); lower the mandrel until the
tyre rests on the movable footboard; exert a certain
pressure on it so that when the movable footboard
is moved outwards, this will create enough space to
extract the inner tube.
• Extract the inner tube and lift the wheel.
• Move to work position
D
(
Fig. 6
).
• Tilt up tool holder arm, unhook it and lift it placing
it in “out of 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 “working”
position (
Fig. 17 ref. 1
) and secure with the safety
hook provided (
Fig. 1-2 ref. 8
).
• 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.
• Move to work position
A
(
Fig. 6
).
• Translate the hook tool outwards until the reference
notch is 3 cm inside the rim.
• Insert the lever (
Fig. 37 ref. 1
) between rim (
Fig. 37
ref. 2
) and bead (
Fig. 37 ref. 3
) on the tool right.
1
2
3
Fig. 37
• Keeping the lever pressed, lower the wheel until the
edge of the rim is approximately 5 mm distant from
the hook tool then turn the mandrel counterclock-
wise keeping the lever (
Fig. 37 ref. 1
) pressed until
the tyre has been completely dislodged from the rim.
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
