Brake Disc Machining
Brake Disc MachiningSpecial Tool(s):
Material:
All vehicles
CAUTION: Do not use a bench lathe to machine the brake discs.
NOTE: Read the entire operating manual and view the video shipped with the lathe before installing, operating, or repairing the lathe.
NOTE: Do not machine new brake discs.
NOTE: Lateral runout and disc thickness variation measurements are not required because correct adjustment of the on-vehicle brake lathe makes sure that these dimensions are within specifications.
1. With the vehicle in NEUTRAL, position it on a hoist.
Hybrid vehicles
CAUTION: Do not allow brake fluid to overflow from the master cylinder reservoir. Brake fluid may damage the high-voltage components.
2. NOTE: The following steps must be followed to prevent the accumulator from charging and pressurizing the brake system.
Disconnect the battery.
3. Remove the battery junction box (BJB) fuses 24 (50 A) and 31 (50 A).
All vehicles
4. NOTE: It is not necessary to disconnect the brake line from the brake caliper.
Position the brake caliper and brake caliper anchor bracket (if equipped) aside.
5. Machine the brake disc using the on-car brake lathe.
1 Install the hub adapter and silencer belt, if necessary.
2 Install the cutting lathe.
3 If the lathe Is not self adjusting, adjust the lathe oscillation using a dial indicator. The total indicated reading (TIR) target is 0.000 mm (0.000 inch), and the maximum is 0.08 mm (0.003 inch).
4 Center the cutting head, adjust the cutting bits, and install the chip deflector.
5 NOTE: The depth of cut should be between 0.10 and 0.20 mm (0.004 and 0.008 inch). Lighter cuts cause the bit to heat up and wear faster. Heavier cuts cause poor brake disc surface finish.
Machine the brake disc.
6 Remove the lathe and, if installed, the silencer belt.
7 Remove the hub adapter.
6. Remove the metal shavings.
7. NOTE: It is not necessary to install new brake pads if the friction material properties are within specification.
Install the brake caliper and brake caliper anchor bracket.