Document e7rEazYqDv0Q4By8LrLRwaJzE

FILE NAME Allied Signal Bendix ASB DATE 1979 Mar 1 DOC ASB137 DOCUMENT DESCRIPTION Memo RE Friction Materials Work Practices Guide with Guide Attached ^' : General Bulletin Date = March , 1979 To Distributor e Attachment Rebuilder Customers * Subject = Friction Materials Work Practices Guide Bendix Automotive Bendix 4 ype Aftermarket Jackson Tennessee 38301 the In this era we are consistently striving to make the environment and in particular work place as free of products that might be harmful to our health as is humanly possible linings As manufacturer of brake linings and disc pads we make every of One of the elements identified as a potentially harmful product is asbestos commonly used in the composition composition brake linings make effort available technolgy technology to keep the workplace for our workers The Friction Materials Standards Institute which is an association of the brake lining manufacturers has published a Work Practices Guide It is aimed at the brake shops and any other areas where the workers are engaged in handling grinding etc. brake linings disc pads and clutch facings The least amount of grinding you and your customers do greatly helps reduce the amount of asbestos emissions in the environment We incorporating believe it is incorporating a fine into publication it clinic carries a vital As fact will program After reviewing the enclosed copy give consideration to distributing the booklets to your customers Determine your requirements and let us know your needs These booklets cost us approximately 10 cents each however we are happy to supply reasonable quantities without charge THE BENDIX CORPORATION AUTOMOTIVE AFTERMARKET 791 HWBU10000164 October 1978 FRICTION MATERIALS _ WORK PRACTICES Friction Materials Standards Institute Inc. HWBU10000165 USE DUST COLLECTION - EQUIPMENT ' WHEN MACHINING ' 3 i y 1 EZ INTRODUCTION The purpose of this booklet is to provide practical guidelines for brake and clutch service mechanics in the handling and process- ing of asbestos containing friction materials and in the maintenance and repair of brake and clutch assemblies on which the materials are installed Adherence to the recommended work practices will reduce employee exposure to airborne concentrations of asbestos dust and will assist employers in complying with government regulations This area is regulated by federal state and local authorities We caution that you may not rely on strict adherence to the work practices recommended herein as assuring compliance with these regulations because a they are subject to amendment b there are going administrative interpretations of these regulations and c particular field conditions may vary You should direct all questions relating compliance with regulations to the appropriate regulatory agencies ASBESTOS AND FRICTION MATERIALS % friction materials contain - some woven materials over 90 In molded materials res~-n binders prevent the release of asbestos fibers during normal handling Woven friction materials normally used only in construction and industrial applications must be handled with care to avoid creating dust as the asbestos fibers are less firmly bound into the product can be created by improper cleaning and handling of worn brake housekeeping Breathing excsive disease quantities of can . Smoking greatly increases the risk of lung cancer among asbestos workers Preven of tasibeostn os eliminating only known : disease those among working with containing products removing ing safeguards removing installing and machin containing friction materials 3 HWBU10000167 DO NOT USE AN AIR HOSE FOR CLEANING HWBU10000168 SUMMARY OF OSHA ASBESTOS STANDARD EFFECTIVE JULY 1 1976 Under the current standard it is the employer's responsibility to assure that exposure of employees does not exceed the following permissible exposure levels a Eight weighted average Two fibers longer than five micrometers per cubic centimeter . b Ceiling Peak concentrations Ten fibers longer than five micrometers per cubic centimeter Engineering controls such as isolation enclosure exhaust ventilation and dust collection are the preferred methods for meeting the prescribed exposure limits All external surfaces must be maintained free of asbestos fiber accumulation Respiratory protection is required whenever airborne fiber con- centrations exceed either the permissible time weighted average level or the permissible ceiling concentration Protective clothing is required whenever airborne fiber concentrations exceed the signs permissible ceiling level employe notification are required where fiber : exce d permissible limits The standard re- quires that all workplaces where asbestos fibers may be released shall be monitored to determine exposure levels and regular monitoring is required where exposure levels are expected to exceed permissible limits Employers must maintain records of monitoring required by the standard They must also provide or make available medical examinations for employees exposed to airborne concentrations of asbestos fibers 10 HWBU10000169 ~ USE VACUUM OR WET METHODS FOR CLEANING HWBU10000170 HANDLING NEW FRICTION MATERIALS Handling new disc brake assemblies lined brake shoes clutch facings and brake blocks purchased in individual boxed sets is parts unlikely to create significant airborne concentrations of asbestos dust If the are purchased in bulk quantities abrasion during shipment may result in the accumulation of dust in shipping containers Dust should be removed by vacuuming or cleaning with a damp cloth Whenever possible purchase friction materials preground and ready for installation This may keep dust levels below OSHA maximums and eliminate the need for respiratory protection restricted areas regular monitoring special clothing change rooms and employee notification REMOVING WORN FRICTION MATERIALS Asbestos fibers in disc brake linings drum brake linings blocks and dry clutch facings are locked into the product with resin binders which prevent the release of asbestos fiber during normal installation Heat and abrasion abrasion during normal generate containing . Some dust will accumulate in brake and clutch assemblies . When removing worn friction materials remove the accumulated dust in the assemblies with an industrial vacuum cleaner equipped with a high efficiency filter system If such equipment Do not use not available dust can be removed with a damp cloth or brushing cleaning for Use a NIOSH approved respirator when removing worn friction MACHINING FRICTION MATERIALS There is an increasing trend for manufacturers and rebuilders to provide brake lining and clutch facings drilled and ground in final assembly form In the case of truck brake blocks various oversize thicknesses are available However there are some instances where field machining is necessary This is particularly true for construction and industrial equipment applications which may require machining of blocks slab stock or roll lining Dust generation can be minimized or eliminated during arcing of brake blocks by lathe turning at low speed rather than grinding Whenever possible friction materials should length shear rather than a saw or abrasive cut wheel 7 =. : HWBU10000171 DO NOT SWEEP IN WORK AREA - USE | VACUUM METHOD | INDUSTRIAL = Z VACE A Q) i HWBU10000172 DUST COLLECTION METHODS Wc hen onta frictii on matn erialsi are man chineg d i.e driled ground gro ved or beveled created contains fibers which may airborne unles controls are employed . The prefered is dust from machining for minimizing ventila tion A local exhaust ventilation system consists of dust collection hoods or enclosures connected by duct work or piping to a dust collection filter and a suction source operations that the excessive amounts airborne asbestos potential fiber for generation grinding beveling lined brake shoes and linings . brake blocks Grinding machines used for these operations must be provided maintain with exhaust ventilation within permissible levels If a central exhaust system is not available NIOSH National Institute for Occupational Safety and Health has stated that at a miminum the dust bag of the arcing machine shall be removed and replaced with the hose from a high efficiency industrial vacuum For large volume machining operations that operate on a con- tinuous basis the preferred dust collection device is a fabric filter or baghouse with a heavy exhaust fan as the suction source The dust collector must meet the cleaning requirements of the Federal Environmental Protection Agency Emission Standard for Asbestos Approval must be obtained from EPA for installation and operation of each system ; OTHER METHODS OF MINIMIZING DUST EXPOSURE machining repair operations from work areas in restricted area prevent exposure of . Entrances to restricted areas shall be posted with asbestos exposure warning signs as follows AR ES Asbestos Dust Hazard Avoid Breathing Dust Wear Assigned Protective Equipment Do Not Remain in Area Unless Your Work Requires it Breathing Asbestos Dust May Be Hazardous To Your Health ER STE 9 HWBU10000173 | WEAR AN APPROVED RESPIRATOR IF UNABLE TO . AVOID DUST i ) ( oe oa | * antl i, = (CY 10 Good housekeeping is essential in a workplace where asbestos containing materials are handled Industrial vacuum cleaners equipped with multiple stage high efficiency filters should be used for removing accumulations of asbestos dust and waste Never compressed dry sweping for cleaning or applied sup res ants should if Good personal hygiene practices are important in minimizing asbestos dust exposure Do not smoke Wash before eating _ arrival after work Change work change from work clothes at conclusion of work Work clothing should not be taken home Laundering of asbestos contaminated clothing shall be done so as prevent release airborne asbestos fibers in excess of the exposure limits DISPOSAL OF FRICTION MATERIAL DUST AND WASTE Dispose of vacuum cleaner waste and asbestos containing cleaning materials in plastic bags or other sealed containers with the following warning label printed on the container Caution Contains Asbestos Fibers Avoid Creating Dust Breathing Asbestos Dust May Cause Serious Bodily Harm a ee er, * Use a NIOSH approved respirator when servicing vacuum cleaners dust collectors or handling any containing waste materials containing waste materials must be collected processed packaged transported and deposited in such fashion that no visible emissions are generated to the atmosphere All wastes must be disposed of at sites operated in accordance with applicable laws and regulations 11 HWBU10000175 SOURCES OF ADDITIONAL INFORMATION Standard for Exposure to Asbestos Dust Code of Federal Regulations Title 29 1910.1001 National Emissions Standards for Hazardous Air Pollutants and Mercury Code of Federal Regulations 40. ChapCthae ptr er 1 Subchapter C Part 61 Subparts A EPA the Fundamentals Governing Design and Operation of Local Exhaust Systems ANSI 29.2-1971 7.00 and Practicns for Respiratory Protection ANSI 288.2- 1969 ANSI Industrial Ventilation Manual 8.00 ACGIH For other information a user may contact the manufacturer supplying his fnction materials the Asbestos Information Association or the Friction Matenais Stand- ards institute ACGIH American Conference of Governmental Industrial Hygienists Committee on Industrial Ventilation P.O. Box 16153 Lansing MI 48901 EPA Environmental Protection Agency Public information 401 M Street SW Washington DC 20460 ANSI FMSI American National Standards Institute Friction Matenals Standards . 1430 Broadway amend New York NY 10018 Institute East 210 Route 4 Paramus NJ 07652 ls yo AIA OSHA Asbestos Information Association Occupational Safety and Health 1745 Jetterson Davis Highway Administration Arlington VA 22202 Office of Information Washington DC 20210 October 1978 HWBUI0000176