Tyres With Inner Tube; Beading; Removal - Butler NAV11 Manuel D'instructions

• Move the tool forward until the reference notch matches the external edge of the rim at about 5 mm from the rim
itself.
• Move to work position C (Fig. 2, Fig. 4, Fig. 6).
• From the external side of the wheel, check the exact position of the tool and, if necessary, correct it. Then, turn
the chucking table clockwise until the grippers reach the lowest point (6 o'clock). The first bead should now be
inserted in the rim.
• Remove the grippers.
• Move to work position D (Fig. 2, Fig. 4, Fig. 6).
• Extract the tool from the tyre.
• Place the tool carrier arm in "rest" position. Translate it to the outer side of the tyre and hook it into work
position.
• Release lever 1 (Fig. 39) and rotate tool 2 by 180° and position hook 3 on the side of the tyre.
• Mount the grippers in the lowest point (6 o'clock) outside the second bead.
• Move to work position C (Fig. 2, Fig. 4, Fig. 6).
• Turn the chucking table 90° clockwise until the grippers are at 9 o'clock.
• Move the tool forward until the reference notch matches the external edge of the rim at about 5 mm from the rim
itself (Fig. 33). Begin clockwise rotation making sure that, after a 90° turn, the second bead begins to slide in
the rim groove. Turn until the grippers reach the lowest point (6 o'clock). The second bead should now be
inserted in the rim.
• Move the tool away from the wheel, turn it over into "rest" position and remove the grippers.
• Lower the chucking table until the wheel is resting on the platform.
• Move to work position B (Fig. 2, Fig. 4, Fig. 6).
• Close the chucking table jaws completely, making sure the wheel is held up to avoid dropping.
MAKE SURE THAT THE WHEEL'S HOLD IS SECURE TO AVOID IT FALLING DURING REMOVAL.
FOR HEAVY AND/OR VERY LARGE WHEELS USE AN ADEQUATE LIFTING DEVICE.
• Translate the platform to release the wheel from the chucking table.
4.7

Tyres with inner tube

4.7.1 Beading

Remove the lock nut of the inner tube valve to allow extraction during tyre removal. Remove the nut
when deflating the tyre.
The beading procedure is the same one described for tubeless tyres.
When beading wheels with inner tubes, interrupt the forward movement of the beading disc as
soon as the beads have been dislodged to avoid damage to the inner tube or to the valve.

4.7.2 Removal

• Tilt up tool carrier arm 3 (Fig. 29), unhook it and place it in the "rest" position. Use the manipulator to position
the tool carrier arm on the outer side of the wheel; place it in work position and secure with the safety hook.
PAY CAREFUL ATTENTION WHEN REPOSITIONING THE TOOL CARRIER ARM TO AVOID
CRUSHING HANDS.
ALWAYS MAKE SURE THAT THE ARM IS CORRECTLY HOOKED ONTO CARRIAGE
• Use lever 5 (Fig. 29) to release tool 4 and rotate it 180° to insert the hook between the edge of the rim and the
tyre bead. This is done during rotation of the chucking table.
• Move the rim away from the tool by about 4-5 cm to avoid possible unhooking of the bead from the tool.
• Translate the hook outwards until the reference notch matches the external edge of the rim.
• Move to work position B (Fig. 2, Fig. 4, Fig. 6).
• Insert lever 1 (Fig. 40) between the rim and the bead on the right-hand side of the tool.
• Keeping the lever pressed, lower the wheel until the edge of the rim is 5 mm from the hook.
• Turn the wheel anticlockwise keeping the lever pressed until the bead has been completely dislodged.
• Place tool carrier arm 3 (Fig. 29) in "rest" position. Lower the chucking arm until the tyre is resting on mobile
surface 1. Exert a certain pressure on it so that when the mobile surface is moved outwards, this will create
enough space to extract the inner tube.
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1465-M002-0 NAV11-21-31, B956, B957, R926