Control measuring axial hub runout, front wheels
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Control measuring axial hub runout, front wheels
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1.
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Raise the car and remove the front wheels.
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2.
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Begin by performing a control measurement on one side.
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3.
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Press in the piston by prising with a screwdriver against the brake pads.
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4.
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Remove the brake caliper retaining bolts and lift off the caliper.
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Note
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Inspect the wheel sensor cable for damage.
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5.
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Suspend the caliper with straps.
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6.
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Remove the brake disc locking bolt.
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7.
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Lift off the brake disc.
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9.
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Rotate the hub and check the runout (the value between the highest and lowest reading).
If the runout exceeds 0.03 mm, replace the hub.
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Note
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The dial gauge should read 0.03-0.05 mm at each bolt hole. This is completely normal.
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10.
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Remove the dial gauge and bracket.
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11.
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If the measured runout values are outside the tolerances, replace the hub, see
Wheel hub, front
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12.
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Clean the contact surfaces between the hub and the brake disc.
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13.
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Place the brake disc on the hub and fit the brake disc locking bolt.
Tightening torque 7 Nm (5 lbf ft)
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16.
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Repeat the measurement method for the other front wheel.
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17.
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Lower the car and press the brake pedal in order to press out the brake pads.
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