Mitsubishi Lancer Evolution IX. Manual - part 489
ON-VEHICLE SERVICE
SERVICE BRAKES
35A-11
BRAKE DISC THICKNESS CHECK
M1351002400469
CAUTION
Take care not to contact the parts or tools to the
caliper because the paint of caliper will be
scratched. And if there is brake fluid on the cali-
per, wipe it off quickly.
ACX00668AB
1. Using a micrometer, measure disc thickness at
eight positions, approximately 45 degrees apart
and 10 mm from the outer edge of the disc.
Standard value:
<Front> 32.0 mm
<Rear> 22.0 mm
Minimum limit:
<Front> 29.8 mm
<Rear> 20.4 mm
NOTE: Thickness variation (at least 8 positions)
should not be more than 0.015 mm.
CAUTION
• After a new brake disc is installed, always
grind the brake disc with on-the-car type
brake lathe. If this step is not carried out, the
brake disc run-out exceeds the specified
value, resulting in judder.
•
AC006226 AB
M12 flat washer
M12 flat washer
When the on-the-car type lathe is used, first
install a M12 flat washer on the stud bolt in
the brake disc side according to the figure,
and then install the adapter. If the adapter is
installed with M12 flat washer not seated, the
brake disc rotor may be deformed, resulting
in inaccurate grinding.
• Grind the brake disc with all wheel nuts diag-
onally and equally tightened to the specified
torque 100 N
⋅m. When all numbers of wheel
nuts are not used, or the tightening torque is
excessive or not equal, the brake disc rotor or
drum may be deformed, resulting in judder.
2. If the disc thickness is less than the limits, replace
it with a new one. If thickness variation exceeds
the specification, turn rotor with an on-the-car type
brake lathe ("Accuturn-8750" or equivalent).
If the calculated final thickness after turning the
rotor is less than the standard value, replace the
disc.