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7522-M001-14_P
GB
Page 23 of 168
GG40256.11SL - GG40256.11ST - GG40256.15
GG40256T.15 - GG40256A.15 - GG40256D.15
GG40256TD.15 - GG40256.15SL - GG60360.15
GG60360T.15 - GG60360A.15 - GG60360D.15 - GG60360TD.15
12.0 USING THE MACHINE
12.1 Precaution measures during tyre re-
moval and fitting
Before fitting a tyre, observe the following safety rules:
• always use clean, dry and in good condition rims
and tyres; in particular, if necessary, clean the rims
after all the balancing weights (as well as the adhesive
weights on the inner side) have been removed, and
make sure that:
- neither the bead nor the tread of the tyre are da-
maged;
- the rim does not produce dents and/or deformation
(especially for alloy rims, dents can cause internal
micro-fractures, that pass unobserved at visual
inspection, and can compromise the solidity of the
rim and constitute danger even during inflation);
• adequately lubricate the contact surface of rim and
tyre bead, using specific tyre lubricants only;
• replace the inner tube valve with a new valve, if the
tyre tube has a metal valve, replace the grommet;
• make sure that the tyre is the right size for the rim;
on the contrary, never fit a tyre unless you are sure
it is the right size (the rated size of the rim and tyre
is usually printed directly on each of them);
• do not use compressed air or water jets to clean the
wheels on the machine.
12.2 Preliminary operations
In view of tyre changer's structure and intended use,
the operator will have to treat large diameter wheels
(up to 2360 mm for GG40256.11SL, GG40256.11ST,
GG40256.15, GG40256T.15, GG40256A .15,
GG40256D.15, GG40256TD.15, GG40256.15SL
and up to 2700 mm for GG60360.15, GG60360T.15,
GG60360A.15, GG60360D.15 and GG60360TD.15)
and with remarkable mass (up to 2000 kg for
GG40256.11SL, GG40256.11ST, GG40256A.15,
GG40256D.15 and GG40256TD.15, up to 2300
kg GG40256.15, GG40256T.15, GG40256.15SL,
GG60360A.15, GG60360D.15, GG60360TD.15 and
up to 2600 kg for GG60360.15 and GG60360T.15).
The utmost care while moving the wheels is recom-
mended: make use of other operators, properly trained
and with suitable clothes.
INSTRUCTION, USE
AND MAINTENANCE MANUAL
12.3 Preparing the wheel
• Remove the wheel balancing weights from both sides
• Establish from which side the tyre should be de-
• Find the rim locking type.
12.4 Wheel clamping
When handling wheels weighing more than 500 Kg a
fork-lift truck or a crane should be used.
DURING ALL TYRES MOUNTING AND DE-
MOUNTING OPERATIONS, THE SELF-CEN-
TRING CHUCK ROTATION SPEED CAN BE DOU-
BLED BY ROTATING THE SELECTOR (FIG. 14
REF . C1).
IN CASE OF GG40256D.15, GG40256TD.15,
G G 4 0 2 5 6 . 1 1 S L
GG40256.15SL (MODEL WITH INVERTER
VERSION) (VARGNAV43AD) GG60360D.15
AND GG60360TD.15 MODELS, USING THE
SELECTOR (FIG. 14 REF . C2), SELF-CENTRING
CHUCK ROTATION SPEED CAN BE ADJUSTED
RESPECTIVELY AT 1, 6 OR 12 RPM. LOW
SPEED IS RECOMMENDED FOR WHEELS WITH
GREAT DIAMETER AND WEIGHT. 1 RPM IS THE
CORRECT SPEED VALUE FOR THE GROOVE OF
TRUCK TYRES. LUBRICATE THE TYRE BEADS
CAREFULLY TO PROTECT THEM AGAINST
ANY DAMAGE AND SIMPLIFY MOUNTING AND
DEMOUNTING OPERATIONS.
REMOVE THE VALVE STEM AND
ALLOW THE TYRE TO COMPLE-
TELY DEFLATE.
of the wheel.
mounted, checking the position of the groove.
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.
MAKE SURE THAT RIM CLAMPING
IS DONE PROPERLY AND THAT
THE GRIP IS SAFE, TO PREVENT
THE WHEEL FROM FALLING DU-
RING MOUNTING OR REMOVAL
OPERATIONS.
( V A R G N A V 4 3 A D ) ,
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