Check lateral runout on both sides of the rotor,
marking the low and high spots on both. Runout lim-
its can be found in the table at the end of this brake
rotor information.
If runout is in excess of the specification, check the
lateral runout of the hub face. Before removing the
rotor from the hub, place a chalk mark across both
the rotor and the one wheel stud closest to where the
high runout measurement was taken. This way, the
original mounting spot of the rotor on the hub is
indexed (Fig. 21).
Remove the rotor from the hub.
NOTE: Clean the hub face surface before checking
runout. This provides a clean surface to get an
accurate indicator reading.
Mount Dial Indicator, Special Tool C-3339, and
Mounting Adaptor, Special Tool SP-1910, to the steer-
ing knuckle. Position the indicator stem so it contacts
the hub face near the outer diameter. Care must be
taken to position stem outside of the stud circle, but
inside of the chamfer on the hub rim (Fig. 22).
Hub runout should not exceed 0.03 mm (0.0012
inch). If runout exceeds this specification, the hub
must be replaced. Refer to the SUSPENSION group
in this service manual for the hub and bearing
removal and installation procedure.
If the hub runout does not exceed this specifica-
tion, install the rotor back on the hub, aligning the
chalk marks on the rotor with a wheel mounting
stud, two studs apart from the original stud (Fig. 23).
Tighten nuts in the proper sequence and torque to
specifications.
Recheck brake rotor runout to see if the runout is
now within specifications.
Fig. 19 Checking Rotor For Thickness
1 – CALIPER
Fig. 20 Checking Rotor Runout
1 – SPECIAL TOOL SP-1910
2 – 25mm FROM EDGE
3 – DISC SURFACE
4 – SPECIAL TOOL C-3339
Fig. 21 Marking Rotor and Wheel Stud
1 – CHALK MARK
LH BRAKES 5 - 17
DIAGNOSIS AND TESTING (Continued)
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