INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 20 of 96
Fig. 14
Clamping on the central hole
Fig. 15
Clamping on bead seat
OPENING/CLOSING MOVEMENT
OF THE SELF-CENTRING MAN-
DREL CAN GENERATE DANGER
OF SQUASHING, CUTTING, COM-
PRESSING. DURING WHEEL
LOCKING/UNLOCKING PHASE,
AVOID THAT PARTS OF HUMAN
BODY COME INTO CONTACT WITH
MOVING PARTS OF THE MACHINE.
All wheels must be clamped from the inside.
Clamping on the central flange is always safest.
NOTE: for wheels with grooved rims secure the
wheel so the groove is facing outward compared to
the mandrel.
If it is not possible to clamp the rim in the hole of the
disc, clamp on the bead seat close to the disc.
TO SECURE WHEELS WITH ALLOY RIMS ADDI-
TIONAL PROTECTIVE JAWS ARE AVAILABLE.
THEY ALLOW YOU TO WORK ON THE RIMS
WITHOUT DAMAGING THEM. THE PROTEC-
TIVE JAWS ARE FITTED ONTO THE MANDREL’S
NORMAL JAWS BY MEANS OF A BAYONET
CONNECTION.
To clamp the wheel proceed as follows:
- Move the tool holder arm (
Fig. 18 ref.1
) to “out of
work” position, manually or with the help of the
provided controls, according to the model of tyre
changer which is being used;
- Move the movable footboard (
Fig. 1 and 2 ref. 18
)
outside. Make the wheel rotate on the same foot-
board;
- Place the lock mandrel (
Fig. 1 and 2 ref. 5
) approxi-
mately in the centre of the wheel; move the footboard
towards the mandrel and centre the wheel on it, in
the most suitable position using the corresponding
control levers;
- Adjust the opening of the self-centring chuck through
the corresponding control (
Fig. 10 ref. E, Fig. 11
ref. A and Fig. 12A ref. E
) according to the type
of rim to be locked;
- Lock the rim with the lock mandrel (
Fig. 1 and 2
ref. 5
);
- Make sure the rim is always correctly locked and
centred, and the wheel is lifted from the machine
platform, in order to prevent the rim from slipping
in the following operations.
KEEP ON OPERATING RIM CLAMP-
ING CONTROL, UNTIL REACHING
THE MAXIMUM OPERATING PRES-
SURE (160 BAR - 180 BAR), WHICH
CAN BE CHECKED THROUGH
THE PREARRANGED PRESSURE
GAUGE.
DURING ALL TYRES MOUNTING AND DE-
MOUNTING OPERATIONS, THE SELF-CENTRING
CHUCK ROTATION SPEED CAN BE DOUBLED
BY ROTATING THE SELECTOR (FIG. 8, 9A E
9B REF. C).
LOW SPEED IS RECOMMENDED FOR WHEELS
WITH GREAT DIAMETER AND WEIGHT. THE
CAREFUL LUBRICATION OF THE TYRES BEADS
IS ALSO RECOMMENDED, IN ORDER TO PRO-
TECT THEM FROM POSSIBLE DAMAGES AND
TO FACILITATE MOUNTING AND DEMOUNTING
OPERATIONS.
Fig. 16
Locking with extensions
7522-M004-1_B
NAV51.15 - NAV51T.15 - NAV51.15N
