28
16
17
18
1
2
A
B
7. Demounting a tyre
Demounting a tyre is much easier if, before
demounting, a commercial lubricant is applied to
the bead and the rim fl ange over which the bead
will be demounted. Never use other products which
its is
only assumed have a lubricating action!
•
Rotate or adjust the clamped wheel (
1, Fig. 17
) so
that the wheel valve is approx. 10 cm in front of
the mounting/demounting tool (
Fig. 16
).
•
Depress the pedal (
2, Fig. 17
) to tilt the tower
into the operating position.
•
Check the mounting/demounting tool setting and/
or adjust it as described in Chapter 5. Adjusting
the mounting/demounting tool.
•
Lift the upper bead over the mounting/demounting
tool tip with the tyre lever (arrow,
Fig. 16
).
•
To facilitate lifting, press the upper tyre bead
down on the opposite side to the mounting/
demounting tool and push it into the rim drop
base (arrow,
Fig. 18 A
).
•
Depress pedal (
1, Fig. 17
) to start turntable
rotation.
•
Leave the tyre lever on the mounting/demounting
tool arm and press against the latter (arrow,
Fig.
16
) until part of the tyre bead has gone over the
rim fl ange.
•
Remove the tyre lever and rotate the turntable
further.
•
Continuing the demounting, make sure the part of
the tyre bead opposite the mounting/demounting
tool is in the drop base and avoid excessive bead
tension (arrow,
Fig. 18 A
).
•
If the turntable stops as a result of excessive
bead tension, turn the turntable backwards
by lifting up the pedal and pressing the bead
opposite the mounting/demounting tool as far
as possible into the drop base, then continue
demounting.
•
In case of tyres with inner tubes, remove the tube
before demounting the lower bead.
•
To demount the lower tyre bead, push the part of
the bead opposite the mounting/demounting tool
into the drop base and lift the tyre directly under
the mounting/demounting tool (
Fig. 18 B
).
•
Then proceed with demounting as described
for the upper bead, with the bead always going
correctly over the beak-shaped tool (arrow,
Fig.
18 B
).
•
When the tyre has been demounted (
2, Fig. 17
),
depress the pedal to tilt the tower backwards.
