John Bean T 3300-24 Manual Del Operario página 20

8a
9
20
3
1
A
B
1
2
Bead breaking
3.1.1 Adjusting the width
Fig. 8a
• For lateral adjustment (maximum opening) remove
the locating bolt (3), move the blade (1) inwards or
outwards and refit the locating bolt.
Position A, the shovel turns but does not come out.
Position B, the shovel cannot turn nor come out.
Bead breaker blade adjusting range:
- retracted: 40 mm - 340 mm / 1" - 12"
- extended: 140 mm - 440 mm / 6" - 17".
3.2 Bead breaking
Remove the valve insert of the wheel valve.
We would recommend to demount the tyre from the
wide rim shoulder in the first place.
Adjust the chuck so that no component (cylinder,
pneumatic unions, etc.) is in contact with the tyre. If
necessary, move the jaws inside. Lean the deflated
wheel on the side against the special rubber pads
provided at the machine housing.
Position the bead breaker blade (Fig. 9, Item 1) on the
outside of the tyre approximately 1 cm away from the
edge of the rim using the adjustable handle for accurate
positioning.
Depress pedal (Fig. 9, Item 2). The blade moves in
between tyre and rim. Release the pedal, continue to
rotate the wheel and repeat the breaking procedure until
the tyre has been unseated completely.
Proceed analogously with the second tyre bead.
In order to facilitate subsequent demounting of tyre
and to preserve tyre and rim, it is most useful to apply
a commercial lubricant on tyre and rim at the place
where the bead breaking blade has just penetrated
into the rim base. Never use other agents only
supposed to lubricate!
Operation manual T 3300-24