Inspection Procedure 8

INSPECTION PROCEDURE 8: Squealing Noise When Brakes are not Applied.

DIAGNOSIS

STEP 1. Check whether the backing plate is bent or loose and interfering with the drum .
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.

STEP 3.Check the brake drum forbear 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 sandpaper, 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 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.

STEP 8. Check whether the brake booster, master cylinder or wheel cylinder return is insufficient.
Q: Is the brake booster, master cylinder or wheel cylinder return insufficient?
YES: Replace the part. Then go to Step 10.
NO: Go to Step

STEP 9. Adjust the brake pedal or brake booster pushrod.
Q: Is the adjustment value come?
YES: Adjust. 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. Symptom Chart