Page text (OCR transcript)
TROUBLESHOOTING (Cont'd)
Problem | Possible cause | Remedy | Page
Squealing, groaning or chattering noise when brakes are applied
Note: Brake friction materials inherently generate noise and heat in order to dissipate energy. As a result, occasional squeal is normal and is aggravated by severe environmental conditions such as cold, heat, wetness, snow, salt, mud, etc. This occasional squeal is not a functional problem and does not indicate any loss of brake effectiveness
Rotors and pads worn or scored | Inspect, service or replace | BR-14,20
Disc brakes—missing or damaged brake pad anti-squeal shim | Replace | BR-14,20
Disc brakes—burred or rusted calipers | Clean or deburr | BR-16,22
Dirty, greased, contaminated or glazed linings | Clean or replace | BR-14,20
Improper lining parts | Inspect for correct usage, replace | BR-14,20
Mal-adjustment of brake pedal or booster push-rod | Inspect and adjust | BR-6,12
Loose or damaged shoe retaining pins, springs and clips and grooved backing plate ledges | Inspect, service or replace | BR-26
Pad wear and pad wear indicator making contact with the rotor | Replace | BR-14,20
Squealing noise when brakes are not applied
Bent or warped backing plate causing interference with drum | Service or replace | BR-26
Improper machining of drum causing interference with backing plate or shoe | Replace drum | BR-26
Mal-adjustment of brake pedal or booster push-rod | Inspect and adjust | BR-6,12
Poor return of brake booster or master cylinder | Inspect, service or replace | BR-9,12 14,20
Disc brake—rusted, stuck | Inspect, lubricate as necessary | BR-14,20
Other brake system components: Loose or extra parts in brakes | Inspect, service, replace as required | BR-26
Rear drum adjustment too tight causing lining to glaze
Worn, damaged or insufficiently lubricated wheel bearings
Drum brakes—weak, damaged or incorrect shoe hold-down springs | | BR-26
Drum brakes—grooved backing plate ledges | | BR-26
Improper positioning of pad in caliper | | BR-14,20
Outside diameter of rotor rubbing caliper housing
Housing installation of disc brake pad support plate | | BR-14,20
Pad wear and pad wear indicator making contact with the rotor | | BR-14,20
