BOOM AS 4340109 - Caterpillar

Most of the gaskets contain asbestos. When dry asbestos gasket material is ground, asbestos fibers are launched into the air, in excess of the acceptable exposure limits of the Occupational Safety and Health Administration (OSHA) standards as of July 1, 1976.
However, if the gasket material is wet, actual tests in a dealer facility have shown the amount of asbestos fibers in the air to be within the OSHA standards of July 1, 1976.
If for any reason you are not sure of the compliance of your facility to federal (OSHA), state and local regulations, a qualified industrial hygienist should be consulted and air sampling performed.
2. With the improved Velcro, it is not necessary to use an air-power polisher instead of the larger air-power grinders, as in earlier Caterpillar recommendations. Air-power polishers are lighter and easier to use than the air-power grinders. Either tool can be used, but be sure it operates at 3500-4500 rpm.3. Keep the discs flat against the surface to be cleaned. Use no force; the weight of the air-power tool is enough to do the work.