Drum Brake System: Service Precautions

WARNING:
^ brakes contain asbestos fibers. avoid breathing dust. breathing asbestos dust may cause asbestosis and cancer.
^ Breathing asbestos dust is hazardous to your health.
^ Dust and dirt present on wheel brake and clutch assemblies may contain asebestos fibers that are hazardous to health when made airborne by cleaning with compressed air or by dry brushing.
^ Wheel brake assemblies and clutch facings should be cleaned using a vacuum cleaner recommended for use with asebestos fibers such as rotunda brake/clutch/service vacuum 091-R0001 or equivalent. Dust and dirt from vacuum should be disposed of in such a manner that prevents dust exposure, such as sealed bags. The bag must be labeled as per OSHA instructions and the trash hauler notified as to the bag's contents.
^ if a vacuum suitable for asbestos is not available, cleaning should be done wet. If dust generation is still possible, technicians should wear government-approved toxic dust purifying respirators.
^ Grinding or sanding on brake linings, pads, rotors, drums or clutch facings should be done only while using properly exhaust-ventilated equipment.
^ OSHA requires areas where asbestos dust generation is possible to be isolated and posted with warning signS. Only technicians concerned with performing; brake or clutch service should be present in the area.

CAUTION:
^ Do not use denatured alcohol for flushing the system or cleaning assemblies where alcohol could be trapped and cause eventual failure of rubber components in the system.
^ Denatured alcohol is acceptable for cleaning parts, provided the parts are completely air-dried and coated with brake fluid before installation.
^ To remove brake fluid contamination, clean all parts with denatured alcohol. Do not attempt to clean contaminated lining. Contaminated brake lining must be replaced.