WARNING: Failure to follow these safety precautions may lead to a serious accident. SAFETY When carrying out inspection and maintenance, park the machine on level ground where there is no danger of falling rocks or landslides, or of flooding if the land is low, then lower the work equipment to the ground and stop the engine. After stopping the engine, operate bucket control lever (1) several times to the RAISE and LOWER positions to release the remaining pressure in the hydraulic circuit, then set safety lock (2) to the LOCK position. Turn parking brake switch (3) to ON and apply the brake, then put blocks under the tires. Lock the front and rear frames with safety bar (4).
The worker carrying out the maintenance should be extremely careful not to touch or get caught in the moving parts. PROPER TOOLS Use only tools suited to the task. Using damaged, low quality, faulty, or makeshift tools could cause personal injury. There is danger that pieces from chisels with crushed heads or hammers may get into your eyes and cause blindness. Tools Hoses and other parts of the fuel, hydraulic, and brake system are critical parts for ensuring safety, so they must be replaced periodically. Replacement of safety critical parts requires skill, so please ask your Komatsu distributor to carry out replacement.
Replace these components periodically with new ones, regardless of whether or not they appear to be defective. These components deteriorate over time, and can cause fire because of oil leakage or failure in the work equipment system. Replace or repair any such components if any defect is found, even though they have not reached the time specified. Replacement of safety critical parts See 22 PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS on page 3-19. WA380-3MC 1-21 STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE REPLACEMENT OF SAFETY CRITICAL PARTS