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1.Remove contaminants or
corrosion from the brake disc surface.
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![](../../../img/35/ACX00668AH00ENG.png)
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2.Use a micrometer to
measure the brake disc thickness at minimum eight points
which are 10 mm inward from its
circumference.
Standard value:
28.0 mm Limit: 26.4 mm
3.If
the brake disc thickness is worn beyond the limit value at
more than one point, replace the brake disc and check its
run-out.
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1.Remove contaminants or
corrosion from the brake disc surface.
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![](../../../img/35/ACX00668AH00ENG.png)
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2.Use a micrometer to
measure the brake disc thickness at minimum eight points
which are 10 mm inward from its circumference. Then record
the measurements. 3.If the brake disc thickness
unevenness (the difference between the maximum and minimum
values measured above) is 0.015 mm or less, it is within the
standard value.
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![](../../../img/35/AC006226AE00ENG.png)
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4.If the brake disc
thickness unevenness exceeds the standard value, grind it
according to the procedure below while it is mounted on the
vehicle.
note |
If it is suspected that the
brake disc thickness will become less than the
limit value after the grinding, replace the
brake disc and check its run-out.
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(1)
Check for wheel bearing looseness in the axial direction
(Refer to GROUP 26 - On-vehicle Service, Wheel bearing
axial play check ). (2)
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caution |
- Insert M12 plain washer and
then install the adapter as
shown before grinding.
Failure to use the M12 plain
washer will cause the brake
disc to be deformed and
ground incorrectly.
- To grind the brake disc,
ensure that all the nuts
(M12 X 1.5) are tightened
evenly and in a diagonal
sequence to the specified
torque (100 N·m).
Failure to use all the nuts
(M12×1.5), excessive
or uneven tightening torque
will cause the brake disc to
deform or judder.
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Correct the brake disc uneven thickness by grinding
it while in place on the vehicle.
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1.Check for wheel bearing
looseness in the axial direction (Refer to GROUP 26 -
On-vehicle Service, Wheel bearing axial play check ).
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2.If the axial play is
within the limit value, secure the brake disc by tightening
the nut (M12×1.5) evenly to the specified torque (100
N·m).If the axial play still exceeds the limit value,
replace the wheel bearing. Then secure the brake disc by
tightening the nut (M12×1.5) evenly to the specified
torque (100 N·m).
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![](../../../img/35/ACX00669AG00ENG.png)
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3.Place a dial gauge ca. 5
mm inward from the circumference of the brake disc to
measure its run-out. Limit: 0.06
mm 4.If the brake disc run-out exceeds the
limit value, rephase the brake disc to the hub so that the
minimum brake disc run-out is obtained.
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![](../../../img/35/AC006226AE00ENG.png)
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5.
caution |
- Insert M12 plain washer and then install
the adapter as shown before grinding.
Failure to use the M12 plain washer will
cause the brake disc to be deformed and
ground incorrectly.
- To grind the brake disc, ensure that all
the nuts (M12 X 1.5) are tightened
evenly and in a diagonal sequence to the
specified torque (100 N·m).
Failure to use all the nuts
(M12×1.5), excessive or uneven
tightening torque will cause the brake
disc to deform or judder.
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If the brake disc run-out exceeds the limit value
after rephasing, grind the disc while in place on the
vehicle so that the brake disc run-out is within the limit
value.
note |
If it is suspected that the
brake disc thickness will be below the limit
value, replace the brake disc.Then rephase the
brake disc so that the minimum brake disc
run-out is obtained, or grind the disc while in
place on the vehicle so that its run-out is
below the limit value.
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