Operating Instructions; Tire Demounting; Preparations For Demounting - Bosch TCE 4225 Original Instructions Manual

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5.

Operating instructions

Warning - tire or rim damage danger!
Excessive pressure can e. g. result in cracks
(on the inside/outside) of the tire. The rim
can be scratched or deformed.
Read the Wdk publications available in
German and English! (www.wdk.de: moun-
ting/demounting instructions – criteria
catalogue)
Inner temperature of the tire must be at
least 15 °C (only in case of RFT/UHP).
Read the Wdk publications available
in German and English! (www.wdk.de:
mounting/demounting instructions – tire
overheating)
Adjust pressure to the type of tire.
Use the plastic protections on the types of
rim that need it.
!
Before demounting or mounting operations it is ext-
remely important to collect all the rim and tire data.
In this way it will be possible to know in advance the
mounting, the pressure and the required accesso-
ries!
i
Remove all the balancing weights from the rim.
i
If the semi drop centre of the rim is placed in the
inside part it is necessary to insert a cover to the
locking jaws (see chap. 3.3) on the flanged plate,
because in this case the rim leans on its side during
rotation.
5.1

Tire demounting

i
Read the Wdk publications available in German and
English!
(www.wdk.de: mounting/demounting instructions).
5.1.1

Preparations for demounting

!
Avoid valve damage!
1. Pull out the needle from the valve.
« The air is discharged completely from the tire.
2. Place the wheel on the floor, close to the antiabrasi-
ve supports of the beadbreaker; to put the blade (1)
close to the bead pressing the bead breaker control
pedal (2). The operation has to be carried out in dif-
ferent points of the wheel (rotating it manually) until
the bead doesn't come off completely.
Robert Bosch GmbH
Operating instructions | TCE 4225 | 31
i
Lubricate the side of the tire and the hump with
mounting paste to make the bead breaking opera-
tions easier.
2
3. Repeat the operation on the opposite side of the
wheel.
Warning – limb injury danger!
During operation of the bead breaking arm,
be careful in order to avoid that the limbs are
not crushed between the tire and the bead
breaker.
Do not insert limbs between the tire and
the bead breaking arm.
Warning – damage risk for RFT or UHP tires!
Cracks in case of operation on cold tire. Tire
explosion in case of high speed.
Inner temperature of the tire must be at
least 15 °C.
Read the Wdk publications available in Ger-
man and English! (www.wdk.de: mounting/
demounting instructions – tire overheating)
Before mounting put the tire in a temperate
room.
en
1
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1 695 105 431
2010-02-16

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