INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 26 of 68
Fig. 31
• Keeping the lever pressed, lift 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 roll holder arm in “off-work” position
(
Fig. 18 pos. 1
); lower the mandrel until the tyre
rests on the floor; exert a certain pressure on it; this
will create enough space to extract the inner tube.
• Extract the inner tube and lift the wheel.
• Move to work position
C
(
Fig. 11
).
• Unhook the roll holder arm and place it in “out of
work” (
Fig. 18 pos. 1
); use the handle control to
position the roll holder arm on the inner side of the
wheel; place it in “work position” (
Fig. 17 pos. 1
)
and secure with the safety pin provided (
Fig. 1 2
and
3 pos. 12
).
• Remount the hook tool with 180° rotation, according
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 the
mandrel rotation.
• Move the rim away downwards from the tool by about
4-5 cm to avoid possible unhooking of the bead of
the same tool.
• Move to work position
A
(
Fig. 11
).
• Translate the hook tool outwards until the reference
notch is 3 cm inside the rim.
• Insert lever (
Fig. 32 pos. 1
) between the rim (
Fig.
32 pos. 2
) and the bead (
Fig. 32 pos. 3
) on the left-
hand side of the tool.
7503-M002-6_B
NAV26HW - NAV26HW.S - NAV26HW.ST
Fig. 32
• Keeping the lever pressed, lift the wheel until the edge
of the rim is approximately 5 mm distant from the
hook tool then turn the mandrel counterclockwise
keeping the lever (
Fig. 32 pos. 1
) pressed until the
tyre has been completely dislodged from the rim.
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 ADVISABLE TO PAY
CAREFUL ATTENTION BEFORE
COMPLETING THE OPERATION.
12.8.3 Mounting
THROUGHOUT TYRE MOUNT-
ING/DEMOUNTING OPERATIONS,
CHECK THAT THE SELF-CENTRING
MANDREL CLAMPING PRESSURE
IS CLOSE TO THE MAXIMUM
OPERATING VALUE (130 BAR)
(NAV26HW - NAV26HW.S).
