Editing Drum brake (section)

== Safety ==
When [[asbestos]] was common in drum brakes, there was a danger workers repairing or replacing them would breathe asbestos fibers, which can cause [[mesothelioma]].<ref name=dowling>Joshua Dowling. [http://www.news.com.au/finance/business/manufacturing/toyota-has-issued-a-warning-about-thousands-of-counterfeit-brake-pads-containing-deadly-asbestos/news-story/b367ae352c742f7da14a02967b49fd3e Toyota has issued a warning about thousands of counterfeit brake pads containing deadly asbestos]. News.com.au. 1 Nov 2015.</ref>  Asbestos fibers would break off or become separated over time and with the high temperatures induced by braking.  Wet brushes and aerosol sprays were commonly used to reduce dust. Safety regulators sometimes recommended using [[Vacuum cleaner|vacuum hoses]] to suck away the dust, or [[Vacuum enclosure|enclosures]] with interior lighting and space to use tools inside them, but these were rare and cumbersome. Distinctive shoes designed to protect against asbestos were also recommended.<ref name=":0">{{Cite journal|url=https://www.cdc.gov/niosh/docs/89-121/|title=CDC - NIOSH Publications and Products - Control of Asbestos Exposure During Brake Drum Service (89-121)|website=Cdc.gov|year=1989|doi=10.26616/NIOSHPUB89121|access-date=2016-07-15|doi-access=free}}</ref> There is evidence that auto mechanics had disproportionate levels of mesothelioma.<ref name=dowling/>

Those who do maintenance work on brakes can also be exposed to the solvents [[1,1,1-Trichloroethane|1,1,1-trichloroethane]] and [[2-Butoxyethanol|2-butoxyethanol]] (a main ingredient in Greasoff No. 19). Exposure to these solvents can cause irritation, including to the eyes and mucous membranes.  Exposure to 1-1-1-trichloroethane vapors can cause central nervous system damage, dizziness, incoordination, drowsiness, and increased reaction time.<ref name=":0" />