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-9- <br /> 3 . Remove exhalation cover . <br /> 4 . Remove speaking diaphragm or speaking diaphragm-exhalation <br /> valve assembly. <br /> 5 . Remove inhalation valves . <br /> 6 . Wash facepiece and breathing tube in cleaner/sanitizer powder <br /> mixed with warm water , preferably at 120-140°F. Wash components <br /> separately from the facemask , as necessary. Remove heavy soil <br /> from surfaces with a hand brush. <br /> 7 . Remove all parts from the wash water and rise twice in clean <br /> warm water . <br /> 8 . Air-dry parts in a designated clean area . <br /> 9 . Wipe facepieces, valves, and sets with a damp lint-free cloth <br /> to remove any remaining soap or other foreign materials . <br /> 8 . 2 Half-Face Respirator <br /> 8 . 2 . 1 Inspection Procedures <br /> 1 . Look for breaks or tears in the headband material ; also <br /> stretch to check the elasticity. <br /> 2 . Make sure all headbands , fasteners , and adjusters are in <br /> place and not bent . <br /> 3 . Check the facepiece for dirt, cracks , tears, or holes . The <br /> rubber should be flexible, not stiff . <br /> 4 . Look at the shape of the facepiece for possible distortion <br /> that may occur if the respirator is not protected during storage . <br /> 5 . Check the exhalation valve located near the chin between the <br /> cartridges . <br /> . Unsnap the cover . <br /> • Lift the valve and inspect the seat and valve for cracks , <br /> tears , dirt, or distortion. <br /> • Replace the cover . It should spin freely. <br /> 6 . Check both inhalation valves ( inside the cartridge holders ) . <br /> Look for same signs as above . <br /> 7 . Check the yoke for cracks. <br />