Komatsu — Komatsu PC450LC-6 Hydraulic Excavator Operation & Maintenance Manual (EN)

WARNING: For reasons of safety, always follow these safety precautions. 8. PRECAUTIONS FOR OPERATION PRECAUTIONS WITH BATTERY When repairing the electrical system or when carrying out electrical welding, remove the negative (-) terminal of the battery to stop the flow of current. PC450-ENG 1-25 HANDLING HIGH-PRESSURE HOSES • Do not bend high-pressure hoses or hit them with hard objects. Do not use any bent or cracked piping, tubes or hoses. They may burst during use. • Always repair any loose or broken fuel hoses or oil hoses. If fuel or oil leaks, it may cause a fire.

HANDLING HIGH-PRESSURE HOSES PRECAUTIONS WITH HIGH PRESSURE OIL • Do not forget that the work equipment circuits are always under pressure. • Do not add oil, drain oil, or carry out maintenance or inspection before completely releasing the internal pressure. • If oil is leaking under high pressure from small holes, it is dangerous if the jet of high-pressure oil hits your skin or enters your eyes. Always wear safety glasses and thick gloves, and use a piece of cardboard or a sheet of wood to check for oil leakage. • If you are hit by a jet of high-pressure oil, consult a doctor immediately for medical attention. PRECAUTIONS WITH HIGH PRESSURE OIL