WARNING: Failure to follow these safety precautions may lead to a serious accident. 8. PRECAUTIONS FOR MAINTENANCE 1-31 PRECAUTIONS WITH HIGH-PRESSURE OIL When inspecting or replacing high-pressure piping or hoses, always check that the pressure in the hydraulic circuit has been released. If the circuit is still under pressure, it will lead to serious injury or damage, so always do as follows. ‡ For details of the method of releasing the pressure, see “8.1 BEFORE CARRYING OUT MAINTE- NANCE, STOP ENGINE BEFORE CARRYING OUT INSPECTION AND MAINTENANCE”. Never carry out inspection or replacement before releasing the pressure completely. ‡ Wear safety glasses and leather gloves.
‡ If there is any leakage from the piping or hoses, the piping, hoses, and the surrounding area will be wet, so check for cracks in the piping and hoses and for swelling in the hoses. If it is difficult to locate the leakage, always please contact your Komatsu distributor for repairs. ‡ If you are hit by a jet of high-pressure oil, consult a doctor immediately for medical attention. INCORRECT CORRECT A0055180 A0055190 PRECAUTIONS WHEN CARRYING OUT MAINTENANCE AT HIGH TEMPERATURE OR HIGH PRESSURE ‡ Immediately after stopping operations, the engine cooling water and oil at all parts is at high temperature and under high pressure.
In this condition, if the cap is removed, or the oil or water are drained, or the filters are replaced, this may result in burns or other injury. Wait for the temperature to go down, then carry out the inspection and maintenance in accordance with the procedures given in this manual. Clean inside or cooling system, check lubricating oil level, add oil © see “24.2 WHEN REQUIRED”. Check cooling water level, engine oil pan, oil level, brake oil level, add oil or water © see “24.3 CHECK BEFORE STARTING”. Checking hydraulic oil level, adding oil © see “24.5 PERIODIC MAINTENANCE”. Changing oil, replacing filters © see “24.6 – 9 PERIODIC MAINTENANCE”. A0055050 HIGH TEMPERATURE OR HIGH PRESSURE