INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 27 of 98
12.6 Tubeless tyres
12.6.1 Bead breaking
NEVER PLACE ANY PART OF YOUR
BODY BETWEEN THE TOOL UNIT
AND THE TYRE.
THROUGHOUT TYRE MOUNT-
ING/DEMOUNTING OPERATIONS,
CHECK THAT THE SELF-CEN-
TRING CHUCK CLAMPING PRES-
SURE IS CLOSE TO THE MAXIMUM
OPERATING VALUE (170 BAR).
A.
Lock the wheel on the mandrel as described in the
previous paragraph.
B.
Remove all balancing weights from the rim. Extract
the valve and let air out of tyre.
C.
Move to work position
C
(
Fig. 8
).
D.
Lower tool holder arm into work position (hooked
safety jack) (
Fig. 19
).
ALWAYS MAKE SURE THAT THE
ARM IS CORRECTLY HOOKED TO
CARRIAGE.
E.
Place as shown in
Fig. 28
the beading disc (
Fig. 28
ref. 1
) by means of the relevant handle control; the
outer profile of the rim (
Fig. 28 ref. 2
) must almost
touch the beading disc.
Fig. 28
3
2
1
THE BEADING DISC MUST NOT
EXERT PRESSURE ON THE RIM
BUT ON THE TYRE BEAD.
F.
Turn the mandrel counterclockwise and, at the
same time, gradually move the tool carrier in-
wards to bead the tyre. Continue to turn the
mandrel while generously lubricating the tyre
rim and bead with a suitable lubricant. To avoid
risks, lubricate the beads by turning clockwise
if you are working on the outer side or counter-
clockwise if you are working on the inner side.
The more the wheel adheres to the rim, the slower
should the beading disc advance.
USE ONLY TYRE LUBRICANTS.
SUITABLE LUBRICANTS CONTAIN
NO WATER, HYDROCARBONS, OR
SILICON.
G.
Once external beading has been carried out, unhook
and lift the tool holder arm placing it in “off-work”
position (
Fig. 20 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. 19
ref. 1
) and secure it with the special safety jack.
PAY ATTENTION WHEN REPOSI-
TIONING THE TOOL HOLDER ARM
TO AVOID CRUSHING HANDS.
H.
Carry out the tools holder head 180° rotation ac-
cording to the descriptions of the relevant para-
graph, so that the beading disc (
Fig. 29 ref. 1
) is
placed against the rim edge (
Fig. 29 ref. 2
).
I.
Move to work position
D
(
Fig. 8
) and repeat the
operations described in points
E
,
F
until the tyre
has been completely beaded.
During all beading operations it is advisable to bend
the hook tool (
Fig. 28, 29 ref. 3
) to avoid obstacles
during the operating phases.
7505-M002-4_B
NAV41.11N - NAV41T.11N - NAV41.13N - NAV41T.13N -
NAV41.13EI - NAV41T.13EI - NAV41.13SA - NAV41T.13SA
