TSB 82-21-5: Brake Rotors Updated Diagnosis/Service (85-9-8)

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Publication date: 1985-05-03 Reference number: 85-9-8 BRAKE ROTORS UPDATED DIAGNOSIS/SERVICE BRAKE ROTORS UPDATED DIAGNOSIS/SERVICE TECHNICAL SERVICE BULLETIN Reference Number(s): 85-9-8, Date of Issue:  May 3, 1985 Superceded Bulletin(s): 85-4-12, Date of Issue:  2/21/85 BRAKE ROTOR SERVICE - UPDATED DIAGNOSIS AND SERVICE CHART APPLICATION Model(s): FORD: 1983-85 ALL LINCOLN-MERCURY: 1983-85 ALL Group: Brakes Bulletin No.: 85-9-8 Date: May 3, 1985 SERVICE INFORMATION This bulletin supersedes Service Bulletin 85-4-12 dated 2/21/85. Technical Service Bulletin Number 82-21-5 refers to sanding the corrosion from the braking surface of the rotor for a brake roughness condition. Sanding is not effective or removing rust/corrosion or the black discoloration caused by semi-metallic brake linings on rotors. Rust/corrosion on the rotor surfaces does not affect performance unless it is thick. Essentially, brake rotor service consists of sanding the braking surface or replacing the rotor when sanding is not effective. Following is an updated Brake Diagnostic and Service Chart. It lists most of the conditions a customer will mention when brake service is required, plus the probable causes and the recommended service. Fig 1: BRAKE DIAGNOSTIC & SERVICE PART 1 TABLE Fig 2: BRAKE DIAGNOSTIC & SERVICE PART 2 TABLE Fig 3: BRAKE DIAGNOSTIC & SERVICE PART 3 TABLE Fig 4: BRAKE DIAGNOSTIC & SERVICE PART 4 TABLE Fig 5: BRAKE DIAGNOSTIC & SERVICE PART 5 TABLE