INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 19 of 33
GB
RAVAGLIOLI S.p.A.
G8641 - G8645
7300-M010-1_R
In order to carry out the clamping of the wheel from the
outside: place the 4 self-centering jaws by using the ap-
propriate levers (
Fig. 21 pos. 1
) in correspondence to
the required clamping range.
Open the self-centering jaws and place them close to the
diameter of the rim to be clamped.
• Place the wheel on the turntable.
• Close the clamps, taking care that they engage the edge
of the rim.
12.6 Demounting the tyre
After clamping the wheel, the tyre is demounted follow-
ing the instructions given below, with reference to
Fig.
22
.
Fig. 23
1. Press the rotation pedal to turn the wheel clockwise
until the insert of the valve has reached the “1 o’clock”
position.
2. Unlock the arm using the push-button located on the
rod handle taking it to the 3
rd
tripping (see
Fig. 17
)
and releasing the arms.
3. Place the demounting/mounting arm on the external
edge of the rim
(
Fig. 23A pos. 1
) pushing until the 1
st
“tripping” the push-button (
Fig. 17
).
4. Lock it in position activating again the push-button
(
Fig. 17
) until the 2
nd
“tripping”.
5. Through the valve lever drive (
Fig. 22 pos. 1
), the
pneumatic cylinder activates the hook descent (mo-
bile part) (
Fig. 23B pos. 2
) which thread its way
between the edge of the rim and the tyre grabbing the
bead of the tyre itself. Then, reversing always through
the lever (
Fig. 22 pos. 1
) the cylinder direction, the
hook (
Fig. 23C pos. 2
) rises up again and thanks to
its movement the tyre steps over the edge of the rim
and places itself for the demounting operation on the
fixed part of the tool (
Fig. 22D pos. 1
).
6. Press the rotation pedal to turn the wheel clockwise
until the whole bead has been lifted from the rim.
7. Lift the tyre and repeat the operation on the other
bead.
If the motor slows down or stops during tyre demounting
and mounting, make the following checks:
• Check that the bead has been lubricated.
• Check that the bead has been pushed into the well.
• Check that the right side of the rim has been chosen
for demounting or mounting the tyre.
• Check that the rim well is not off-centre.
12.7 Mounting the tyre
To mount the tyre, proceed as follows:
1. Lubricate the tyre beads.
2. Place the tyre on the rim and place the mounting tool
on the outer edge of the rim.
3. Place the edge of the lower bead on the left-hand part
of the mounting tool and turn the turntable clock-
wise.
4. Repeat the operation on the upper bead, taking care
first to position the valve insert at “5-6 o’clock”.
Fig. 22
Summary of Contents for G8641 Series
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