This document contains an excerpt from an operation and maintenance manual for Caterpillar products. It provides important safety information about operating, maintaining, and repairing products safely. It warns that failure to follow basic safety rules can cause accidents. It also contains definitions of various pictograph symbols used in Caterpillar manuals to identify hazards, safety alerts, potential damage operations, and other important maintenance information. The full manual contains these symbols organized by different machine systems and applications.