Unseating The Tire Bead - Bosch Start Line TCE 420 Notice Originale

!
Pay special attention when demounting/mounting
tire that the rim or tire are not damaged.
!
In the process of inflating the tire, there is a risk that
the tire may burst.
!
The cross-section of some rims is that shown in the
figure below. The C position is very deep on these
rims. B is higher than A here. When you break the
bead of this type of tire, you must press the bead,
since it must be lower than the B position. When
mount the tire, the bead opposite to the mounting
head must over B point. At this moment, the bead
can be led into the groove at the middle of the rim.
!
Some wheels have the tire pressure inspect system
as figure below. Do not damage the tire pressure
monitoring system when mounting/demounting
tires.
i
To protect the rim, the mounting head plastic cover
should be changed twice a month. If damaged, these
plastic parts should be changed at once.
Robert Bosch GmbH
Operation | Start Line TCE 420 | 37
7.4

Unseating the tire bead

!
Not using the grease will seriously damage the tire.
Please use the special grease.
!
Remove all balance weights on the rim.
i
Before demounting and re-mounting the tire, check
for signs of wear on all protective plastic parts.
Replace the wheel-guard hoods if necessary.
i
Always establish the rim and tire data prior to
removal/mounting. The method of attachment,
pressure and accessories required can then be
planned in advance.
1. Check whether the tire has been deflated
completely. If not, you should deflate at first.
Warning – Risk of injury from trapping
hands between rim-chuck plate and tire.
As the tire moves, make sure that your hands
do not get caught between the tire and rim-
chuck plate.
¶
Before starting, turn the rim-chuck plate to
a position where the rim-chuck claws are
at an angle of 45° to the machine housing.
WARNING – Risk of injury to extremities!
¶
Use extreme caution when operating the
bead breaker arm in order to prevent limbs
from being crushed between the tire and
the bead breaker unit.
¶
Never reach between the tire and the bead
breaker arm.
¶
The clamping jaws on the turntable should
be closed completely.
¶
Do not open the clamping jaws while
unseating the tire bead.
2. Lean the tire against the rubber wheel support.
3. The surface of the blade will stay about 1 cm away
from the rim, and the blade should rest on the tire
properly.
!
Pay attention to the position of the blade to prevent
it from touching the rim after bead breaking.
en
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1 695 108 074 2016-07-27