Volkswagen Polo Service & Repair Manual: Wheel, Balancing, Tire and Wheel Radial and Lateral Run-Out, Checking
Before beginning balancing, the following requirements must
be fulfilled. |
The tire pressure must be OK. |
The tire profile must not be worn on one side. The tire
profile must be at least 4 mm. |
The tires must not have any damage such as cuts, holes,
foreign bodies, etc. |
The suspension and steering, including the shock absorber,
must be in perfect condition. |
Test drive performed. Refer to
→ Chapter „Vibration, Road Test, Performing Before Balancing“. |
Radial and lateral run-out occur when the wheel and tire are
not running precisely true. |
For technical reasons, 100% true running is not possible. |
Therefore the manufacturers of these components allow a
precisely specified tolerance. |
Mounting the tire in a unfavorable position on the wheel can
be the cause for exceeding the maximum allowed tolerance for
wheel with tire. |
– |
Preload the Tire Dial Gauge approximately 2 mm. |
|
|
|
– |
Position the Tire Dial Gauge on the side wall of the tire. |
– |
Rotate the wheel slowly. |
– |
Note the smallest and the largest dial readings. |
Note
If the difference is greater than 1.3 mm, the lateral
run-out is too great. |
In this case the radial run-out can be reduced by matched
mounting. Refer to
→ Chapter „Tires and Rims, Matching“. |
Peak values on the Tire Dial Gauge due to small
irregularities in the rubber may be disregarded. |
– |
Preload the Tire Dial Gauge approximately 2 mm. |
|
|
|
– |
Position the Tire Dial Gauge on the tread of the tire. |
– |
Rotate the wheel slowly. |
– |
Note the smallest and the largest dial readings. |
Note
If the difference is greater than 1 mm, the radial run-out
is too great. |
In this case the radial run-out can be reduced by matched
mounting. Refer to
→ Chapter „Tires and Rims, Matching“. |
The table shows the maximum permissible tolerance values for
the wheel with mounted tire. |
Tolerances for Radial and Lateral
Run-Out of Rim With Tire |
|
|
|
Rim With Tire |
Radial
Run-Out (mm) |
Lateral
Run-Out (mm) |
Passenger Vehicle |
0.9 |
1.1
(1.3 near the lettering) |
Before beginning balancing, the following requirements must
be fulfilled.
The tire pressure must be OK.
The tire p ...
Mount the rim on the Balancing Machine.
–
Use the Wheel Centering System Adapter -VAS5271-.
–
Preload th ...
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