SICE S 52A Manual De Instrucciones página 39

Remove bead roller from tire when bead is loosened.
Move the bead roller to the inboard position of the tire carriage.
Tire not shown for clarity.
Move the inboard bead roller into the working position.
Use the inboard/outboard and up/down controls to bring the roller against the sidewall of the tire.
The wheel rim should be no more than 3/16" (5 mm) from the top of the bead roller.
Press the bead roller lightly against tire.
NOTE: Lubrication is essential for safe & easy demounting.
While rotating the wheel in either direction, generously lubricate the tire bead area and slowly push the tire bead off of
the wheel.
Remove bead roller from tire when bead is loosened.
S 52A Operator's Manual 39