Carbon Ceramic Brake Disc Cleaning And Inspection - Project 8 (G2248937): Check

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not use compressed air to clean brake components. Dust from friction materials can be harmful if inhaled.

CAUTION:

The brake disc can be easily damaged. Do not strike or lever on the brake disc.
Take care not to contaminate the brake pad friction materials or the brake discs.

NOTE:

This procedure contains some variation in the illustrations depending on the vehicle specification, but the essential information is always correct.
This procedure contains illustrations showing certain components removed to provide extra clarity.

NOTE: Normal brake disc condition.

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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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- New carbon ceramic brake discs and carbon ceramic brake disc visual wear indicators appear as shown in the illustration.
- The carbon ceramic brake disc visual wear indicators shown in the illustration should not be mistaken with the burn-off conditions 'B' or 'C' in step
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- Carbon ceramic brake discs are equipped with visual wear indicators, every brake disc contains 3 visual wear indicators per side. Brake discs must be replaced if the overall burn-off loss of the 6 visual wear indicators per disc equals, or exceeds 100 mm2.
  1. New brake disc.
  2. Used brake disc.
  3. Worn brake disc.
WARNING: A new brake disc must be installed if any of the following defects are found.
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1. Example of a brake disc at the end of its serviceable life.
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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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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 mm2.
5. Maximum number of chips of braking surface allowed = 3.
Only do the brake disc measurement procedure if the condition of the brake discs can't be recognized using the previously described methods.
- Remove the front brake disc.
  Refer to: BRAKE DISC - PROJECT 8
- Remove the rear brake disc.
Refer to: BRAKE DISC - PROJECT 8
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.
- CAUTION: Do not use Trichlorethane or any brake cleaning fluid to clean the brake disc.
  
  Thoroughly clean the brake disc including clearing the cooling vents and cleaning the bell section with a suitable non-metallic tool.
- If the brake disc has been subject to wet conditions allow drying time (release of moisture from the disc material).
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1. New brake disc weight.
2. Minimum brake disc weight.
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1. New.
2. Maximum wear limit = 0.5 mm.
- Install the front brake disc.
  Refer to: BRAKE DISC - PROJECT 8
- Install the rear brake disc.
  Refer to: BRAKE DISC - PROJECT 8