Mitsubishi Evolution X. Manual — part 823
ON-VEHICLE SERVICE
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BASIC BRAKE SYSTEM
35A-19
3. Remove the following parts from the brake caliper assembly.
(1) Shim
(2) Brake pad assembly
CAUTION
Keep grease or other soiling off the pad and brake disk
friction surfaces.
AC706163AB
MB990520
Piston
Caliper
body
4. Clean the piston, then press the piston into the cylinder
using the piston expander (Special tool: MB990520).
AC710738AB
<Front>
<Rear>
Grease: Repair kit grease, Molykote AS880N
or equivalent
AC710739AB
<Rear>
Grease: Repair kit grease, Molykote 7439
or equivalent
<Front>
ON-VEHICLE SERVICE
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BASIC BRAKE SYSTEM
35A-20
5. Apply grease to the pad as shown in the figure.
Grease:
Between pad and shim: Repair kit grease, Molykote
AS880N or equivalent
Shoulder section: Repair kit grease, Molykote 7439
or equivalent
6. Install the shim to the brake pad assembly. Then, install the
brake pad assembly to the brake caliper assembly so that
the direction of shim arrow points to the same direction as
the brake disk rotation direction of when the vehicle travels
forward.
NOTE: Install the brake pad assembly (with wear indicator)
to outside the vehicle.
7. Install the cross spring to the brake caliper assembly.
AC211990AC
Cross
spring
Pin
ON-VEHICLE SERVICE
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BASIC BRAKE SYSTEM
35A-21
8. While pressing the cross spring by hand, install the pin to
the brake caliper assembly.
DISK BRAKE ROTOR CHECK
M1351002900710
CAUTION
Disk brakes must be kept within the allowable
service values in order to maintain normal brake
operation.
Before turning the brake disk, the following condi-
tions should be checked.
Inspection item
Remark
Scratches, rust, saturated lining materials and wear
• If the vehicle is not driven for a long period of
time, sections of the disks that are not in contact
with the pads will become rusty, causing noise
and shuddering.
• If grooves and scratches resulting from excessive
disk wear are not removed prior to installing a new
pad assembly, there will be inadequate contact
between the disk and the lining (pad) until the
pads conform to the disk.
Run-out
Excessive run-out of the disks will increase the pedal
depression resistance due to piston kick-back.
Change in thickness (parallelism)
If the thickness of the disk changes, this will cause
pedal pulsation, shuddering and surging.
Inset or warping (flatness)
Overheating and improper handling while servicing
will cause warping or distortion.
.
BRAKE DISK THICKNESS CHECK
ACX00668 AB
1. Using a micrometer, measure disk thickness at eight
positions, approximately 45 degrees apart and 10 mm (0.4
inch) in from the outer edge of the disk.
Standard value:
32.0 mm (1.26 inch) <Front>
22.0 mm (0.87 inch) <Rear>
Limit:
30.0 mm (1.18 inch) <Front>
20.0 mm (0.79 inch) <Rear>
NOTE: Thickness variation (at least 8 positions) should not
be more than 0.015 mm (0.0006 inch).
ON-VEHICLE SERVICE
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BASIC BRAKE SYSTEM
35A-22
CAUTION
• After a new brake disk is installed, always grind the
brake disk with on-the-car type brake lathe. If this step
is not carried out, the brake disk run-out exceeds the
specified value, resulting in judder.
•
AC006226 AE
M12 Flat washer
M12 Flat washer
When the on-the-car type lathe is used, first install M12
flat washer on the stud bolt in the brake disk side
according to the figure, and then install the adapter. If
the adapter is installed with M12 flat washer not seated,
the brake disk rotor may be deformed, resulting in inac-
curate grinding.
• Grind the brake disk with all wheel nuts diagonally and
equally tightened to the specified torque 100 N
⋅ m (74
ft-lb). When all numbers of wheel nuts are not used, or
the tightening torque is excessive or not equal, the
brake disk rotor or drum may be deformed, resulting in
judder.
2. If the disk 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 ("MAD,
DL-8700PF" or equivalent). If the calculated final thickness
after turning the rotor is less than the standard value,
replace the disk.
.
FRONT BRAKE DISK RUN-OUT CHECK AND
CORRECTION
1. Remove the brake assembly, and then hold it with wire.
2. Temporarily install the disk with the hub nut.
ACX00669AB
3. Place a dial gauge approximately 5 mm (0.2 inch) from the
outer circumference of the brake disk, and measure the
run-out of the disk.
Limit:
0.06 mm (0.0024 inch) <Front>
0.08 mm (0.0032 inch) <Rear>
4. When the brake disk runout exceeds the limit value, correct
the brake disk runout according to the following procedure.
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