Front Disc Brake Rotor: Inspection
- Check bearing axial end play and hub runout before disc rotor runout limit inspection.
- Moving tire up and down by hand, check that there is no backlash in the bearing, and check that the wheel rotates smoothly.
- Inspect the lean of axis direction using a dial gauge. Replace the hub bearing if the load range exceeds 0.002" (0.05 mm).
- Install disc rotor by tightening 5 wheel nuts.
- Set a dial gauge 0.39" (10 mm) inward of rotor outer perimeter. Turn disc rotor to check the runout. If disc rotor runout is above 0.003" (0.075 mm), replace the rotor. See Fig 1
.
- Set a micrometer 0.39" (10 mm) inward of the rotor outer perimeter, and then measure disc rotor thickness. See Figure
. See DISC BRAKE SPECIFICATIONS
. If thickness of disc rotor is outside the service limit, replace disc rotor.
Courtesy of SUBARU OF AMERICA, INC.