{"id":9333,"date":"2017-06-08T04:13:02","date_gmt":"2017-06-08T04:13:02","guid":{"rendered":"http:\/\/mazdaman.x10host.com\/sm353006\/"},"modified":"2017-06-08T04:13:02","modified_gmt":"2017-06-08T04:13:02","slug":"sm353006","status":"publish","type":"page","link":"https:\/\/chroot-me.in\/16ND\/sm353006\/","title":{"rendered":"FRONT BRAKE (DISC) INSPECTION"},"content":{"rendered":"
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2016 – MX-5 – Brakes<\/h2>\n

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FRONT BRAKE (DISC) INSPECTION<\/h3>\n

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Brake Judder Repair Hints<\/h4>\n

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Description<\/h5>\n

1. Brake judder concern has the following 3 characteristics:
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Steering wheel vibration<\/h5>\n

1. The steering wheel vibrates in the rotation direction. This characteristic is most noticeable when applying brakes at a vehicle speed of 100\u2014140 km\/h {62.2\u201486.9 mph}<\/b>.
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Floor vibration<\/h5>\n

1. When applying the brakes, the vehicle body shakes back and forth. The seriousness of the shaking is not influenced by vehicle speed.
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Brake pedal vibration<\/h5>\n

1. When applying the brakes, a pulsating force tries to push the brake pad back. The pulsation is transmitted to the brake pedal.<\/p>\n

2. The following are the main possible causes of brake judder:
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Due to an excessive runout (side-to-side wobble) of the disc plate, the thickness of the disc plate is uneven.<\/h5>\n

1. If the runout is more than 0.04 mm {0.002 in}<\/b> at the position 10 mm {0.39 in}<\/b> from the disc plate edge, uneven wear occurs on the disc plate because the pad contacts the plate unevenly.<\/p>\n

2. If the runout is less than 0.04 mm {0.002 in}<\/b>, uneven wear does not occur.
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The disc plate is deformed by heat.<\/h5>\n

1. Repeated panic braking may raise the temperature in some portions of the disc plate by approx. 1,000 \u00b0C {1,832 \u00b0F}<\/b>. This results in a deformed disc plate.
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Thickness and friction coefficient of the disc plate change due to corrosion.<\/h5>\n

1. If the vehicle is parked in damp conditions for a long time, corrosion occurs on the friction surface of the disc plate.<\/p>\n

2. The thickness of the corrosion is uneven and it sometimes appears like a wave pattern, which changes the friction coefficient and causes a reaction force.
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Inspection and repair procedure<\/h5>\n

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Lateral runout inspection<\/h5>\n

1. Remove the front brake hose bracket from the front upper arm. (See BRAKE HOSE (FRONT) REMOVAL\/INSTALLATION [WITH SINGLE PISTON CALIPER]<\/a>.) (See BRAKE HOSE (FRONT) REMOVAL\/INSTALLATION [WITH 4-POT OPPOSED PISTON CALIPER]<\/a>.)<\/p>\n

2. Remove the front brake caliper component and suspend it out of the way using a cable.<\/p>\n

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3. To secure the disc plate and the hub, insert the washer (thickness 10 mm {0.39 in}<\/b>, inner diameter more than 12 mm {0.47 in}<\/b>) between each hub bolt and the hub nut, then tighten all the hub nuts.<\/p>\n

4. After tightening all the hub nuts to the same torque, put the dial gauge on the friction surface of the disc plate 10 mm {0.39 in}<\/b> from the disc plate edge.<\/p>\n

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5. Rotate the disc plate one time and measure the runout.<\/p>\n