Safety Awareness - 16 Cx Series Operator’s Manual Machine Safety Alerts Machine Safety Alerts p C12x 1 Moving digging teeth. Contact will cause death or serious injury. Stay at least 6’ (2m) away. 6ft/2m 2 High noise levels. Exposure can cause hearing loss. Wear hearing protection. 3 Underground utilities. Contact can cause death or serious injury. Locate and verify underground utilities before digging or drilling.