INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 41 of 116
GB
ERGOLOCK.CB - AD - ST
7102-M004-0_B
Fig. 39
This position is important because:
• It reduces the tension during mounting/demounting.
• It spreads the force applied to the mounting tool over
the largest area possible.
• It significantly reduces the wear on the tool.
3. Move the lever protector (# 0326001) to the pointed
end of the bead lifting lever. Use the lever to lift the
bead onto the right end of the mounting tool and po-
sition it parallel with the rim plate at the same time
pressing on the side of the tyre at the “6 o’clock” po-
sition.
4. Press the pedal to turn the wheel clockwise until the
whole bead comes out of the rim. During the rotation
of the wheel, the bead lifting tool slides away from
the mounting tool moving onto the rim flange. The
plastic protector prevents the lever from scratching
the rim.
5. Raise the tyre and repeat the operation on the sec-
ond bead.
WITH ROUNDED OR FLAT EDGE
RIMS, THE ARM SHOULD HAVE
AN ANGLE OF 100°/110°.
On heavy low-profile tyres it is advisable to help the
demounting by continuing to press down, after bead-
breaking, to obtain enough space to lubricate the well,
the bead seating, and the bead itself (See
Fig. 40
). Lack
of lubrication could result in friction between the mount-
ing tool and the tyre which could damage the tyre and/or
the bead.
Fig. 40
Lubricate
When the upper bead is being demounted, it may hap-
pen that the lower bead re-sets in the rim. In this case
use the lower roller to bead-break again, and if the
tyre is very wide push it up to the mounting tool (See
Fig. 41
).
Fig. 41
When demounting hard tyres, it may happen that the
bead comes onto the mounting tool with the lip turned.
This causes the bead to slide from the lever when the
clockwise rotation begins. To avoid this problem rotate
the wheel slightly anti-clockwise until the bead flattens.
Now the clockwise demounting cycle can begin (See
Fig.
42
).
12.5 Demounting the tyre (only for ver-
sions CB and AD)
When both beads are broken, the tyre can be demounted
1. Press the right-side pedal to rotate the wheel clock-
wise until the valve stem reaches the “one o’clock”
position.
2. Position the mounting/demounting arm on the rim
flange.
It is important to position the mounting arm correctly
(there are 4 possible positions). The four positions are
set using the knob on the column and moving the arm
manually until it is locked in the required position.
The correct position is achieved when the angle between
the tool arm and the rim plate is 90° (See
Fig. 39
).
