Distinguishing features between twelve-point head bolt with ribbing and twelve-point head bolt without ribbing. |
The twelve-point head bolt are only distinguishable on the contact surfaces -arrow A- and -arrow B-. |
I - | Twelve-point head bolt with ribbing -arrow A- |
II - | Twelve-point head bolt without ribbing -arrow B- |
Caution Wheel bearings must not be subjected to load after bolt securing drive shaft to wheel hub has been loosened. |
If wheel bearings are loaded with weight of vehicle, bearing will be damaged. This reduces the service life of the wheel bearing. |
It is not permissible to turn drive shaft bolt more than 90° anti-clockwise if vehicle is standing on the wheels. |
Do not attempt to move the vehicle without the drive shafts fitted as this would damage the wheel bearing. If a vehicle nevertheless has to be moved, comply with the following: |
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| Install an outer joint instead of the drive shaft. |
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| Tighten outer joint to 120 Nm. |
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| To avoid damage to wheel bearing, do not loosen 12-point bolt using 24 mm socket -T10361- further than 90° with vehicle still standing on its wheels. |
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| Raise vehicle so that wheels are off the ground. |
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| Have second mechanic apply brakes. |
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