Volkswagen Touran Service Manual: Vibration
Vibration, Causes for Vibration
| There are many causes for vibration. Vibration can also be
caused by tire wear, among other things. Tire wear caused by
driving does not always develop evenly over the entire tread.
Due to this, a slight imbalance develops which disturbs the
smoothness of the formerly accurately balanced wheel. |
| This slight imbalance cannot yet be felt in the steering
wheel, but it is present. It increases the tire wear and
consequently reduces the service life of the tire. |
| In order to guarantee over the entire service life of a tire
a |
| it is recommended that wheels/tires be balanced at least two
times within the tire's service life. |
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Vibration, Road Test, Performing Before Balancing
| If a vehicle comes to the workshop with the complaint
"vibration", a road test must be performed before balancing the
wheels. |
| That way, information about the type of vibration can be
obtained. |
| Observe at which speed range the disturbance takes place. |
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Raise the vehicle on the platform immediately after the road
test. |
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Mark the component location on the tire. |
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Component Location of Tire |
Identification with ... |
| Left front tire |
LF |
| Right front tire |
RF |
| Left rear tire |
LR |
| Right rear tire |
RR |
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Remove the wheels from the vehicle. |
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Vibration, Vibration Control System
| Expanded functions can be performed using Hunter RFT33VAG
Road Force Touch Wheel Balancer -VAS6230B4- in addition to the
previously known balancers. |
| A special characteristic of this system is testing the
radial force of wheel/tire during rolling. |
| For this purpose, a roller presses a force of approximately
635 kg (0.7 ton) against the wheel. This simulates the tire
contact force against the street surface while driving. |
| Tire contact forces fluctuate due to radial- and lateral
run-out and differing rigidity in the tires. |
| The Hunter RFT33VAG Road Force Touch Wheel Balancer
-VAS6230B4- detects and stores the position of the maximum
measured radial force in the tires. After that, the position of
smallest dimension between rim flange and disc wheel center is
measured. |
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Test Conditions Before and During the Road Test
Check all suspension components on front and rear axle for
damage.
...
Flat Spots, Correcting
Flat spots cannot be removed from tires with workshop
equipment.
Such flat spots can be &qu ...
Other materials:
Volkswagen Touran Owners Manual. Hitching and connecting the trailer
First read and observe the introductory information
and safety warnings Emergency breakaway cable
Always fasten the trailer's emergency breakaway cable properly
to the towing vehicle. Leave enough slack in the emergency breakaway cable so that
the vehicle can still drive around corners ...
Volkswagen Touran Service Manual. Wear Spots
Wear spots are caused by a hard stop with locked wheels
whereby the rubber compound is abraded from the contact patch.
When the tires slide across the road surface, frictional
heat is generated which reduces the abrasion resistance on the
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Corrective Action When Vehicle Pulls to One Side
Flat Spots, Correcting