INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 19 of 66
Fig.
_
12
Clamping on the central hole
Fig.
_
13
Clamping on bead seat
OPENING/CLOSING MOVEMENT
OF THE SELF-CENTRING MAN-
DREL CAN GENERATE DANGER
OF SQUASHING, CUTTING, COM-
PRESSING. DURING WHEEL LOCK-
ING/UNLOCKING PHASE, AVOID
THAT PARTS OF HUMAN BODY
COME INTO CONTACT WITH MOV-
ING 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:
- Manually move the tool holder arm to “off-work”
position (
Fig.
_
15 ref.
_
1
);
- Move the movable footboard (
Fig.
_
1-2 ref.
_
15
) out-
side. Make the wheel rotate on the same footboard;
- Place the lock mandrel (
Fig.
_
1-2 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.
_
9 ref.
_
A and Fig.
_
11
ref.
_
B
) according to the type of rim to be locked;
- Lock the rim with the lock mandrel (
Fig.
_
1-2 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 (150 BAR), WHICH CAN BE
CHECKED THROUGH THE PREAR-
RANGED PRESSURE GAUGE.
DURING ALL TYRES MOUNTING AND DE-
MOUNTING OPERATIONS, THE SELF-CEN-
TRING CHUCK ROTATION SPEED CAN BE
DOUBLED BY ROTATING THE SELECTOR (FIG.
8C-8D REF. C). LOW SPEED IS RECOMMENDED
FOR WHEELS WITH GREAT DIAMETER AND
WEIGHT.
THE CAREFUL LUBRICATION OF THE TYRES
BEADS IS RECOMMENDED, IN ORDER TO PRO-
TECT THEM FROM POSSIBLE DAMAGES AND
TO FACILITATE MOUNTING AND DEMOUNTING
OPERATIONS.
To avoid damages or scratches on light alloy rims,
the special jaws supplied with the tyre changer as an
optional should be used.
AFTER COMPLETION OF TYRE
MOUNT/DEMOUNT OPERATIONS
DO NOT LEAVE THE WHEEL
CLAMPED ON THE SELF-CEN-
TRING CHUCK AND NEVER LEAVE
IT UNATTENDED ANYWAY.
NAV11N - NAV11NT
NAV11EI - NAV11TEI
7505-M001-3_B
