Mitsubishi Galant. Manual — part 505

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-11

STEP 6. Check the clearance (too low) between the
pushrod and primary piston.
Refer to

P.35A-31

.

Q: Is there fault?

YES : Adjust the clearance. Then go to Step 10.
NO : Go to Step 7.

STEP 7. Check the master cylinder piston return spring for
damage and return port for clogging.
Refer to

P.35A-33

.

Q: Is there damage?

YES : Replace the part. Then go to Step 10.
NO : Go to Step 8.

STEP 8. Check port for clogging.

Q: Is the port clogged?

YES : Repair it. Then go to Step 10.
NO : Go to Step 9.

STEP 9. Check disc brake pistons for sticking.
Depress the brake pedal, then release. Confirm each wheel
spins freely.

Q: Are all wheels stuck?

YES : Inspect that brake assembly. Then go to Step 10.
NO : Go to Step 10.

STEP 10. Recheck symptom.

Q: Is the symptom eliminated?

YES : Diagnosis is complete.
NO : Start over at step 1. If a new symptom surfaces, refer

to the symptom chart.

INSPECTION PROCEDURE 5: Scraping or grinding noise when brakes are applied

DIAGNOSIS

STEP 1. Check the front brakes, then rear brakes, for
metal-to-metal condition.

Q: Is the metal-to-metal contact evident?

YES : Repair or replace components. Then go to Step 6.
NO : Go to Step 2.

STEP 2. Check for interference between the caliper and
wheel.

Q: Is there interference?

YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 3.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-12

STEP 3. Check for interference between the dust cover and
brake disc.
Q: Is there interference?

YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 4.

STEP 4. Check the brake drums or discs for cracks.

Q: Are there cracks?

YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 5.

STEP 5. Check for bent backing plate(s).
Q: Is (Are) the backing plate(s) bent?

YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 6.

STEP 6. Recheck symptom.

Q: Is the symptom eliminated?

YES : Diagnosis is complete.
NO : Start over at step 1. If a new symptom surfaces, refer

to the symptom chart.

AC000860

DUST
COVER

BRAKE DISC

AB

AC000861AB

<REAR DRUM BRAKE>

<REAR DISC BRAKE>

BACKING PLATE

BACKING PLATE

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-13

INSPECTION PROCEDURE 6: Squealing, groaning or chattering noise when brakes are applied

DIAGNOSIS

STEP 1. Check the brake drums and lining or
brake disc and pads for wear or cutting.

Q: Is there wear or cutting?

YES :

Repair or replace the part. Then go to Step

7.

NO :

Go to Step 2.

STEP 2. Check the calipers for rust.

Q: Is there rust?

YES :

Remove the rust. Then go to Step 7.

NO :

Go to Step 3.

STEP 3. Check the lining parts for damage.
If equipped with rear disc brakes, go to Step 6.

Q: Is there damage?

YES :

Repair or replace the part. Then go to Step

7.

NO :

Go to Step 4.

STEP 4. Check whether the lining is dirty or
greasy.

Q: Is the lining dirty or greasy?

YES :

Clean or replace the part. Then go to Step

7.

NO :

Go to Step 5.

STEP 5. Check whether the shoe hold-down
springs are weak or the shoe-hold-down pins
and springs are loose or damaged.

Q: Is there fault?

YES :

Repair or replace the part. Then go to Step

7.

NO :

Go to Step 6.

STEP 6. Adjust the brake pedal or brake booster
pushrod.
Refer to

P.35A-17

or

P.35A-31

.

Q: Is the adjustment value come?

YES :

Adjust. Then go to Step 7.

NO :

Go to Step 7.

STEP 7. Recheck symptom.

Q: Is the symptom eliminated?

YES :

Diagnosis is complete.

NO :

Start over at step 1. If a new symptom
surfaces, refer to the symptom chart.

INSPECTION PROCEDURE 7: Squealing noise when brakes are not applied

DIAGNOSIS

STEP 1. Check whether the backing plate is bent or loose
and interfering with the drum. <Vehicles equipped with
rear drum brakes>
If equipped with rear disc brakes, go to Step 4.

Q: Is there fault?

YES : Replace the part. Then go to Step 10.
NO : Go to Step 2.

STEP 2. Check whether the drum is damaged due to
interference with the backing plate or shoe.

Q: Is there damage?

YES : Replace the part. Then go to Step 10.
NO : Go to Step 3.

BASIC BRAKE SYSTEM DIAGNOSIS

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BASIC BRAKE SYSTEM

35A-14

STEP 3. Check the brake drum for wear and the shoe-to-
shoe spring for damage.

Q: Is there wear or damage?

YES : Replace the part. Then go to Step 10.
NO : Go to Step 4.

STEP 4. Check the brake discs for rust.

Q: Are the brake discs rusted?

YES : Remove the rust by using sand paper. If still rusted,

turn the rotors with an on-the-car brake lathe. Then go
to Step 10.

NO : Go to Step 5.

STEP 5. Check the brake pads for correct installation.

Q: Are the pads installed incorrectly?

YES : Repair it. Then go to Step 10.
NO : Go to Step 6.

STEP 6. Check the calipers for correct installation.

Q: Are the calipers installed incorrectly?

YES : Repair it. Then go to Step 10.
NO : Go to Step 7.

STEP 7. Check the wheel bearings for deterioration or
damage, and the grease quality and quantity.
Q: Are the wheel bearings damaged or out of grease?

YES : Apply grease or replace the part. Then go to Step 10.
NO : Go to Step 8.

AC000862

WHEEL
BEARING

WHEEL
BEARING

<FRONT>

<REAR>

AB