Mitsubishi Evolution X. Manual — part 820
BASIC BRAKE SYSTEM DIAGNOSIS
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BASIC BRAKE SYSTEM
35A-7
INSPECTION PROCEDURE 4: Brake Drag
DIAGNOSIS
STEP 1. Check the parking brake operating lever return.
AC709382
Parking brake
operating lever
AB
Q: Is the operation faulty?
YES : Repair it. Then go to Step 7.
NO : Go to Step 2.
STEP 2. Check the shoe-to-anchor springs and adjusting
wheel spring for breakage.
AC709382
Shoe-to-anchor
springs
Adjusting wheel spring
AC
Q: Are the shoe-to-anchor springs and adjusting wheel
spring broken?
YES : Replace the spring. Then go to Step 7.
NO : Go to Step 3.
STEP 3. Check the amount of grease at each sliding
section.
Refer to GROUP 36, Parking Brake Lining and Drum
.
Q: Is the grease amount low?
YES : Apply grease. Then go to Step 7.
NO : Go to Step 4.
STEP 4. Check the parking brake pull amount.
Refer to GROUP 36, On-vehicle Service
− Parking Brake lever
Stroke Check and Adjustment
Q: Is there a fault?
YES : Adjust it. Then go to Step 7.
NO : Go to Step 5.
STEP 5. Check port for clogging.
Q: Is the port clogged?
BASIC BRAKE SYSTEM DIAGNOSIS
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BASIC BRAKE SYSTEM
35A-8
STEP 6. Check disk brake pistons for sticking.
Depress the brake pedal, then release. Confirm each wheel
spins freely.
Q: Does any wheel stick?
YES : Inspect that brake assembly. Then go to Step 7.
NO : Go to Step 7.
STEP 7. Recheck symptom.
Q: Is the symptom eliminated?
YES : The procedure 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 any metal-to-metal contact evident?
YES : Repair or replace the components. Then go to Step 6.
NO : Go to Step 2.
STEP 2. Check for interference between the caliper and
wheel.
Q: Is there any interference?
YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 3.
STEP 3. Check for interference between the dust cover and
brake disk.
Q: Is there any interference?
YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 4.
STEP 4. Check the brake drums or disks for cracks.
Q: Are there cracks?
YES : Repair or replace the part. Then go to Step 6.
NO : Go to Step 5.
BASIC BRAKE SYSTEM DIAGNOSIS
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BASIC BRAKE SYSTEM
35A-9
STEP 5. Check for bent backing plate(s).
AC709382AD
Backing plate
<Rear>
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 : The procedure is complete.
NO : Start over at step 1. If a new symptom surfaces, refer
to the symptom chart.
INSPECTION PROCEDURE 6: Squealing, Groaning or Chattering Noise when Brakes are Applied
DIAGNOSIS
STEP 1. Check the brake disk and pads for wear
or cutting.
Q: Is there wear or cutting?
YES :
Repair or replace the part. Then go to Step
4.
NO :
Go to Step 2.
STEP 2. Check the calipers for rust.
Q: Is there any rust?
YES :
Remove the rust. Then go to Step 4.
NO :
Go to Step 3.
STEP 3. Adjust the brake pedal.
Refer to
Q: Is the brake pedal adjusted correctly?
YES :
Go to Step 4.
NO :
Adjust the brake pedal. Then go to Step 4.
STEP 4. Recheck symptom.
Q: Is the symptom eliminated?
YES :
The procedure is complete.
NO :
Start over at step 1. If a new symptom
surfaces, refer to the symptom chart.
BASIC BRAKE SYSTEM DIAGNOSIS
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BASIC BRAKE SYSTEM
35A-10
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.
Q: Is there a fault?
YES : Replace the part. Then go to Step 9.
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 any damage?
YES : Replace the part. Then go to Step 9.
NO : Go to Step 3.
STEP 3. Check the brake drum for wear and the shoe
spring for damage.
Q: Is there any wear or damage?
YES : Replace the part. Then go to Step 9.
NO : Go to Step 4.
STEP 4. Check the brake disks for rust.
Q: Are the brake disks 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 9.
NO : Go to Step 5.
STEP 5. Check the brake pads for correct installation.
Q: Are the pads installed incorrectly?
YES : Repair the pads. Then go to Step 9.
NO : Go to Step 6.
STEP 6. Check the calipers for correct installation.
Q: Are the calipers installed incorrectly?
YES : Repair the calipers. Then go to Step 9.
NO : Go to Step 7.
STEP 7. Check the wheel bearings for end play.
Refer to GROUP 26
− On-vehicle Service, Wheel bearing end
play check
<Front> or GROUP 27
− On-vehicle Service,
Wheel bearing end play check
<Rear>.
Q: Does the measured end play exceed the limit?
YES : Replace the faulty hub assembly. Then go to Step 9.
NO : Go to Step 8.
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