INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 32 of 96
• Position mobile platform (
Fig. 1-2 ref. 18
) directly
under the wheel and lower the mandrel until the
wheel is resting on the platform.
• Move to work position
B
(
Fig. 9
).
• Check the state of the tyre valve and centre it, if neces-
sary, in the rim hole by slightly turning the mandrel;
fix the valve with the supplied ring nut after having
removed the protective extension.
• Close the mandrel 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 LIFT-
ING DEVICE.
• Translate the movable footboard to release the wheel
from the same mandrel.
12.8 Wheels with bead wire
As an example,
Fig. 42
and
43
illustrate sections and
compositions of types of wheels with bead wire cur-
rently being sold.
Fig. 42
O-sealing
ring
O-sealing
ring
Non split
side ring
Non split
side ring
Tapered
bead seat
ring
Three-piece flat base rim and pertinent rings
for tubed tyres and SOLID tyres
Four-piece 5” tapered bead seat rim and
pertinent rings for tubed and SOLID tyres
Fig. 43
O-sealing
ring
O-sealing
ring
Non split
ring
Non split
ring
Rubber seal-
ing ring
O-sealing
ring
12.8.1 Beading and demounting
NEVER STAND IN FRONT OF THE
WHEEL WHILE THE INFLATION
RING IS BEING EXTRACTED FROM
THE BEAD WIRE, SINCE IT MAY BE
EJECTED VIOLENTLY, CAUSING
SERIOUS INJURIES OR WOUNDS.
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).
• Mount the wheel on the mandrel as described in
“WHEEL CLAMPING” and make sure it is deflated.
• Move to work position
D
(
Fig. 6
).
• Place the tool arm in working position (
Fig. 17
ref. 1
) in the tyre inner side, and make sure it is
locked by the provided safety stop (
Fig. 1-2 ref. 8
).
• Position the beading disc on rim edge (see
Fig. 44
).
Fig. 44
• Turn the mandrel and smear the entire bead seat
of the rim with lubricant. While doing this, jerk the
beading disc forward until the first bead is removed
(as these wheels feature inner tubes, carry out the
operation carefully, paying special attention to when
the bead dislodges, trying to stop disc advancement
immediately to avoid compromising the integrity of
the inner tube and valve).
• Place the tools holder arm in “out of work” position
(
Fig. 18 ref. 1
), operate the handle control in order
to position the tools holder arm on the wheel outer
side, then place it in “working” position (
Fig. 17
ref. 1
) again and lock it with the safety hook pro-
vided.
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
