JOLLY Operator’s manual 35
GB
DANGER
When working these wheels it is possible to damage the tyre, the rim or both, with
the risk of the tyre exploding under pressure causing serious injury or death. When
mounting tyres on this type of wheel, use the utmost caution.
European style high performance wheels (asymmetrical curvature)
Some European wheels have very pronounced curves on the rim edge, except in the
area of the valve hole. On this type of wheel bead breaking must be performed in cor-
respondence with the valve hole and on the lower and upper side of the wheel.
Fig.10
A Valve hole
B Slight curvature
C Pronounced curvature
Wheels for Corvette, BMW, Lamborghini and other wheels with “Low pressure indi-
cator system”
Some types of high performance wheels are equipped with a pressure transmitter se-
cured to the rim with a belt on the side opposite the valve hole. On this type of wheel
bead breaking must be done initially in correspondence with the valve hole, on both
sides of the rim.
Fig.11
A Valve hole
B Transmitter
C Attachment belt
Bead Breaking
- Fully deflate the tyre, removing the valve.
- Take the wheel to the bead breaking position. Bring the shoe (fig. 12) up to the bead
and press pedal H (fig. 13).
- Repeat this operation at various points around the tyre until the bead is freed from
the rim. Repeat the same operation on the other side of the tyre (fig. 14).
- Remove the weights.
- Use pedal G to open or close the four mobile clamps, depending on whether the rim
is to be clamped in the inside or outside (fig. 15).
The first clamping system is recommended for alloy or special wheels, to avoid scra-
tching, (fig. 16).
- Thoroughly lubricate the sides of the tyre around the entire circumference of the
lower and upper bead to facilitate the demounting and avoid damaging the beads
(fig. 17).
- Position the wheel on the jaws, press the rim down slightly and press pedal G to
clamp the rim (fig. 15).
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