| Positioning of the tyre in relation to the rim |
| When the radial or axial deviation of the rim and of the tyre
match, the drive instability of the wheel with the tyre rises. |
| The concentricity to 100% is not feasible due to technical
reasons → Chapter. |
| Before starting the positioning of the tyre in relation to
the wheel, perform a warm-up of the tyres through displacement of
the vehicle. This way occasional deformations due to stoppage are
eliminated → Chapter. |
| Sequence of operations to perform the positioning
of the tyre in relation to the wheel |
| –
| Loosen the tyre beads from the wheel flap. |
| –
| Pass the tyre beads around the wheel with Tyre
assembly paste. Refer to the → Chemicals
Manual. |
| –
| Displace the tyre 180° in relation to the rim. |
| –
| Inflate the tyre until approximately 4 bar. |
| –
| Attach the rim with the tyre using the balancing machine. |
| –
| Inspect the radial and axial deviations of rim concentricity |
Note | t
| If the nominal value of radial and axial deviations are not
exceeded, balance the wheel to 0 gram. The nominal values may be referred
in → Anchor. |
| t
| It is required to displace the tyre again if the radial and/or
axial deviations are out of nominal values. |
| –
| Remove the air from the tyre and loosen the tyre from the
rim flaps. |
| –
| Displace the tyre 90° in relation to the rim (1/4 of turn). |
| –
| Inflate the tyre again to 4 bar-pressure and check the concentricity. |
Note | t
| If the nominal value of radial and axial deviations are not
exceeded, balance the wheel to 0 gram. |
| t
| It is required to displace the tyre again if the radial and/or
axial deviations are out of nominal values. |
| –
| Loosen the tyre from the rim flaps again, according to description
above. |
| –
| Displace the tyre 180° in relation to the rim (1/2 of turn). |
| If the radial and/or axial deviation is out of nominal values
yet, check the rim radial and axial deviations → Chapter. |
| It the vertical and horizontal deviations at the rim is within
the nominal values, the tyre has a vertical or horizontal deviation
excessively high. In this case, replace the tyre. |
Note | t
| Due to tyre assembly, there is assembly paste between the tyre
and the wheel flaps. |
| t
| For this reason, avoid sudden acceleration and braking during
the first 100 or 200 km of the travel. Otherwise, the tyres may displace
from the wheel and the operation would be all in vain! |
|
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