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WHEELS
14
Checkin the brake discs
Warning
Danger of accidents
-
Make sure that worn-out brake discs are replaced immediately.
Checkin spoke tension
Warning
Danger of accidents
The spokes break due to being overloaded if they are too tightly tensioned. If the tension in the spokes is too low, then lat
eral and radial run-out will form in the wheel. Other spokes will become looser as a result.
-
Check spoke tension regularly, and in particular on a new vehicle.
Worn-out brake discs reduce the braking effect.
-
Check the thickness of the front and rear brake discs at multiple points on each
brake disc to ensure it is at least thickness f).
Info
•
I
Wear reduces the thickness of the brake disc around the area used by the
brake linings.
Brake discs - wear limit
Front
Rear
If
the brake disc thickness is less than the specified value:
-
Change the front brake disc.
-
Change the rear brake disc.
-
Check the front and rear brake discs for damage, cracking, and deformation.
If
the brake disc exhibits damage, cracking, or deformation:
-
Change the front brake disc.
-
Change the rear brake disc.
Incorrectly tensioned spokes impair the handling characteristic and result in secondary damage.
-
Strike each spoke briefly using a screwdriver blade.
•
Info
I
The frequency of the sound depends on the spoke length and spoke
diameter.
If you hear different tone frequencies from different spokes of equal length
and diameter, this is an indication of different spoke tensions.
I
You should hear a high note.
the spoke tension differs:
If
-
Correct the spoke tension.
-
Check the spoke torque.
Guideline
Spoke nipple, front wheel
Spoke nipple, rear wheel
I
Torque wrench with various accessories in set (58429094000)
I
4.25 mm (0.1673 in)
I
3.5 mm (0.138 in)
M4.5
6 Nm (4.4 lbf ft)
M4.5
6 Nm (4.4 lbf ft)
(I!!:!
p. 229)
92
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