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Carbon Ceramic Brake Disc Cleaning And Inspection: Inspection

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Normal brake disc condition.
    WARNING: A new brake disc must be installed if any of the following defects are found.
    • (1) Brake disc surface after bedding in procedure.
    • (2) Brake disc surface after 124 miles (200 km) hard use (race/track).
    • (3) Brake disc surface after 310 miles (500 km) hard use (race/track).
    • (4) Brake disc surface after 621 miles (1000 km) hard use (race/track).
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    • Example of a brake disc at the end of its serviceable life.
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  3. Excessive wear of the brake pads, to the point of the pad back plate making contact with the brake disc.
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    • (1) Unused brake disc - surface cracking.
    • (2) Bedded brake disc - surface cracking.
    • (3) Inner diameter cracking.
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  5. Damage to the brake disc ventilation channels.
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    • (1) Maximum width allowed = 4 mm.
    • (2) Maximum depth allowed = 4 mm.
    • (3) Maximum length allowed = 20 mm.
    • (4) Maximum area (projected on the braking surface) = 40 mm.
    • (5) Maximum. number of chips allowed = 3.
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    7. NOTE: In order to minimise measurement errors when evaluating the brake disc weight loss the following processes must be followed prior to weighing the brake disc.
    • Thoroughly clean the brake disc including clearing the cooling vents and cleaning the bell section.
    • If the brake disc has been subject to wet conditions allow drying time (release of moisture from the disc material).
    • (1) New brake disc weight.
    • (2) Minimum brake disc weight.
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    9. NOTE: Unlike cast iron brake discs the thickness of the brake disc is not indicative of the wear level. However, the brake disc minimum thickness can be measured. The minimum thickness of the brake disc must always be measured along the base of the inner and outer edge of the friction surface. Brake disc thickness is 38 mm+/- 0.1 mm. The maximum brake disc wear limit is 0.5mm
    • (A) = New.
    • (B) = Maximum wear limit = 0.5 mm.
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