Corghi Artiglio 500 Manuel D'utilisation page 44

During demounting, if the tool is unable to keep the tyre
bead engaged to allow demounting to start, the tyre
bead may still be inserted on the underside. Use the
lower bead breaker disc in an upward direction both
to break the tyre bead again and to help to maintain
a grip on it.
Demounting the bottom bead (Demounting using the tool head)
A - Push the bead breaker disc against the bottom bead using control
B - Using control
44
NOTICE
, operate the hook and engage the bottom bead of the tyre (Fig. 32a).
B
A
A B
32a
Artiglio 500 User Manual
(Fig. 32a).