INSTRUCTION, USE AND
MAINTENANCE MANUAL
Page 40 of 116
GB
ERGOLOCK.CB - AD - ST
7102-M004-0_B
Fig. 37
Fig. 38
• Start the hydraulic pump, again with the left button,
until the roller locks onto the side of the tyre. (The
locking is complete when the roller is seen to move
forward).
• Move the lower roller up by pressing the right button
until it touches the tyre.
• Start the hydraulic pump, again with the right button
until the roller locks on the tyre.
• Rotate the wheel anti-clockwise pushing the upper rela-
tive pedal and simultaneously pressing the right but-
ton to bead-break the bottom (It is possible to follow
the operation using the mirror mounted on the bead-
breaker).
• After bead-breaking the bottom, the lower roller is
moved back to the rest position by changing the right
button to position “0”.
• Proceed to bead-break the upper flange in the same
way but using the left control unit button.
Instructions for Bead-Breaking “TD” and “AH” Tyres
and Rims
“TD” Type rims and tyre
• Bead-break one bead at a time starting with the upper
bead.
• Position the roller 1cm from the flange of the rim.
• Rotate the rim anti-clockwise and simultaneously press
the left button of the bead-breaker to activate the hy-
draulic pump.
• Keep the hydraulic pump in operation until there is
sufficient space between tyre and rim to lubricate the
bead.
• Continue with the pump until the bead is completely
broken.
• Turn the wheel and lock it to bead-break from the
lower part. It may happen
that th
e bead reverses. In
this case, remove the roller and start again re-posi-
tioning the roller against the flange of the rim and use
the full power of the machine until the bead is broken.
“AH” type rims and tyres
After locking the rim proceed as follows:
• Lubricate the edge of the tyre.
• Position the rollers as normal.
• Bead-break one bead at a time starting from the lower
bead.
For “TD” and “AH” wheels it is advisable that the air
supply pressure never falls below 8 bar.
12.3.3 Column movement device
For CB and AD versions it is possible to adjust the bead-
breaker position to adapt the using range of the tyre
changing machine to the different wheel dimensions.
The column unit (
Fig. 37 pos. 3
) can move backward
(
Fig. 37 pos. A
) (for big wheels) or it can advance (
Fig.
37 pos. B
) (in case of little wheels) through a sliding
guide adjusted by a handwheel (
Fig. 37 pos. 1
) to turn
only after lever operating (
Fig. 37 pos. 2
) as indicated
with the
C
arrow to release the device.
After the column
unit positioning (
Fig. 37 pos. 3
), lock the device
positioning the lever as indicated with the
D
arrow.
12.4 Bead breaking by means of vertical
rolls (only for versions CB and AD)
• After locking the wheel, move the bead-breaker to its
work position.
• Set the wheel diameter by moving the control back-
wards or forwards referring to the diameter scale on
the control unit. This scale is purely
indicative
since
rims of equal diameter are not all the same.
• Move the upper roller down until it touches the tyre
using the button on the left side of the control unit
and set it in position on the side of the rim (see
Fig.
38
).
