INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 42 of 116
GB
ERGOLOCK.CB - AD - ST
7102-M004-0_B
NO
YES
Fig. 42
Fig. 43
When demounting hard low-profile tyres, it may happen
that the bead pushes up the mounting tool. It may be
found useful to use the upper bead-breaking roller to
push the bead down to create enough space to position
the lever and at the same time pushing up the tool arm
(
Fig. 43
).
Fig. 44
To carry out this operation it is necessary to lock the
bead-breaker with the knob, move the upper bead-
breaker roller towards the rim edge, and start the hy-
draulic pump while simultaneously turning the motor
clockwise (See
Fig. 45
).
Locking
knob
Fig. 45
If the motor slows or stops during tyre mounting or
demounting, carry out the following checks:
• Check that the bead has been lubricated.
• Check that the bead has been pushed into the well.
• Check that the correct side of the rim has been chosen
for the tyre mounting or demounting.
• Check that the supply pressure is not below 8 bar.
• Check that the rim does not have an off-centre well.
There are rims on the market for which it is difficult to
check the position of the well with the tyre mounted. A
useful method for checking is to use the bead-breaker
rollers, pressing on the tyre sufficiently to see the inside
of the rim.
12.6 Tyre assembly (only for versions CB
and AD)
To mount tyres, proceed as follows:
1. Lubricate the tyre bead.
2. Position the tyre on the rim and lower the arm to
position the mounting tool on the rim outside flange,
checking the angle.
3. Position the lower rim flange on the left side of the
mounting tool and press the pedal to rotate clock-
wise.
4. Repeat the operation on the upper bead, taking care
to first position the valve stem between 5 and 6
“o’clock”.
When mounting hard low-profile tyres it may be useful
to use the upper bead-breaker roller to push the bead
into the well. (See
Fig. 44
).
