Mitsubishi 380. Manual — part 296

ON-VEHICLE SERVICE

BASIC BRAKE SYSTEM

35A-18

CAUTION

Do not wipe off the special grease that is on the lock pin.
Do not contaminate the lock pin.
2. Remove the lock pin bolt . Pivot the caliper assembly

upward and secure. Hold lock pin with spanner while
loosening bolt(Rear).

15DB195A

<REAR>

AC305371

AC

<FRONT>

15DB196A

<REAR>

ON-VEHICLE SERVICE

BASIC BRAKE SYSTEM

35A-19

3. Remove the following parts from the caliper support.

(1) Pad assembly
(2) Clip

4. In order to measure the brake drag force after pad

installation, measure the rotary-sliding resistance of the hub
with the pads removed (Refer to

P.35A-30

).

5. Install the pads and caliper assembly, and then check the

brake drag force (Refer to

P.35A-30

).

6. Tighten lock pin bolt. Ensure lock pin is held with spanner

while tightening lock pin bolt(Rear) to specified torque.

DISC BRAKE ROTOR CHECK

M1351002900334

CAUTION

Disc brakes must be kept within the allowable
service values in order to maintain normal brake
operation.
Before turning the brake disc, the following condi-
tions should be checked.

15DB197A

2

1

2

1

<FRONT>

<REAR>

15DB196A

<REAR>

ON-VEHICLE SERVICE

BASIC BRAKE SYSTEM

35A-20

.

BRAKE DISC THICKNESS CHECK

1. Using a micrometer, measure disc thickness at eight

positions, approximately 45 degrees apart and 10 mm (0.4
inch) in from the outer edge of the disc.

FRONT BRAKE DISC

Standard value: 26.0 mm (1.02 inches)
Minimum limit: 24.4 mm (0.96 inch)

REAR BRAKE DISC

Standard value: 10.0 mm (0.39 inch)
Minimum limit: 8.4 mm (0.33 inch)

NOTE: Thickness variation (at least 8 positions) should not
be more than 0.015 mm (0.0006 inch).

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 discs that are not in contact
with the pads will become rusty, causing noise
and shuddering.

• If grooves and scratches resulting from excessive

disc wear are not removed prior to installing a new
pad assembly, there will be inadequate contact
between the disc and the lining (pad) until the
pads conform to the disc.

Run-out

Excessive run-out of the discs will increase the pedal
depression resistance due to piston kick-back.

Change in thickness (parallelism)

If the thickness of the disc changes, this will cause
pedal pulsation, shuddering and surging.

Inset or warping (flatness)

Overheating and improper handling while servicing
will cause warping or distortion.

ACX00668AB

ON-VEHICLE SERVICE

BASIC BRAKE SYSTEM

35A-21

CAUTION

• After a new brake disc is installed, always grind the

brake disc with an 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.

• 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 inac-
curate grinding.

• Grind the brake disc with all wheel nuts diagonally and

equally tightened to the specified torque 100 N

⋅m (74

ft-lb). If all of the wheel nuts are not used, or the tight-
ening 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 limit, 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.

.

AC006226AB

M12 FLAT WASHER

M12 FLAT WASHER