Procedures

BRAKE DISC MACHINING

NOTE:Do not use a bench lathe to machine the brake discs. Use an on-vehicle brake lathe only. Read the entire operating manual and/or view the video shipped with the lathe before installing, operating, or repairing the lathe.
NOTE:An on-vehicle brake lathe with an automatic runout adjustment feature is preferred. However, if the lathe is not self-adjusting, the lathe oscillation must be adjusted using a dial indicator. The total indicated runout target is 0.000 mm (0.000 inch). The maximum indicated runout should be no more than 0.050 mm (0.002 inch). If the runout adjustment (automatic or manual) is carried out correctly prior to machining, then the final brake disc runout will be within specification, and a runout measurement is not necessary after machining.
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 will make sure that these dimensions are within specifications.
1. Remove the wheel and tire. See Service and Repair.

2. Remove the bolts and position the brake caliper or brake caliper and anchor plate assembly aside, as required.

- Support the brake caliper using mechanic's wire.

CAUTION:Do not allow the caliper to hang from the brake hose or damage to the hose may occur.
NOTE:It is not necessary to disconnect the brake tube from the brake caliper.
3. Install the hub adapter using:

- Four wheel nuts on a 4-stud wheel hub.
- Five wheel nuts on a 5-stud wheel hub.
- Six wheel nuts on a 6-stud wheel hub.
- Four wheel nuts on a 7- or 8-stud wheel hub.
- Five wheel nuts on a 10-stud wheel hub.

4. Install the cutting lathe.

5. If the lathe is not self adjusting, adjust the lathe oscillation using a dial indicator. Total indicated runout target is 0.000 mm (0.000 inch). The maximum indicated runout should be no more than 0.050 mm (0.002 in).

6. Center the cutting head, adjust the cutting bits, and install the chip deflector/silencer.

7. Machine the brake disc. See Specifications.

NOTE:The depth of cut should be between 0.10 and 0.40 mm (0.004 and 0.015 in). Lighter cuts will cause the bit to heat up and wear faster. Heavier cuts cause poor brake disc surface finish.
8. Remove the lathe and the silencer.

9. Remove the wheel nuts and hub adapter.

10. Remove the metal shavings.

11. Position the brake caliper or brake caliper and anchor plate assembly.

- Install the bolts.

- For front disc brake caliper anchor plate bolts, tighten to 175 Nm {17.5 kgf-m, 129 ft-lbf}.
- For rear disc brake caliper guide bolts, tighten to 35 Nm {3.5 kgf-m, 26 ft-lbf}.

NOTE:It is not required to install new brake pads if friction brake material is within specifications. See Specifications.
12. Install the wheel and tire. See Service and Repair.