INSTRUCTION, USE AND
MAINTENANCE MANUAL
GB
Page 17 of 68
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.
7503-M002-6_B
NAV26HW - NAV26HW.S - NAV26HW.ST
12.2 Preliminary operations
In view of the tyre changer structure and of its intended
use, the operator must work with wheels with large
diameter (up to 2550 mm) and with remarkable weight
(up to 2300 kg).
The utmost care while moving the wheels is recom-
mended: make use of other operators, properly trained
and with suitable clothes.
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.
12.3 Preparing the wheel
• Remove the wheel balancing weights from both sides
of the wheel.
REMOVE THE VALVE STEM AND
ALLOW THE TYRE TO COMPLETE-
LY DEFLATE.
• Establish from which side the tyre should be de-
mounted, checking the position of the groove.
• Find the rim locking type.
12.4 Wheel clamping with self-centring
mandrel (NAV26HW - NAV26HW.S)
FOR WHAT CONCERNS THE DI-
MENSIONS AND WEIGHT OF THE
WHEEL TO BE LOCKED, MAKE
USE OF A SECOND OPERATOR
WHO MUST HOLD THE WHEEL
INTO VERTICAL POSITION, IN
ORDER TO ENSURE SAFE OPERA-
TIVE CONDITIONS.
When handling wheels weighing more than 500 Kg a
fork-lift truck or a crane should be used.
MAKE SURE THAT RIM CLAMPING
IS DONE PROPERLY AND THAT
THE GRIP IS SAFE, TO PREVENT
THE WHEEL FROM FALLING DUR-
ING MOUNTING OR REMOVAL
OPERATIONS.
DO NOT CHANGE THE SET OP-
ERATING PRESSURE VALUE BY
MEANS OF THE MAXIMUM PRES-
SURE VALVES. THE MANUFAC-
TURER SHALL NOT BE RESPON-
SIBLE FOR INJURY OR DAMAGE
ARISING FROM UNAUTHORISED
CHANGES.
