PRECAUTIONS FOR MAINTENANCE SAFETY WARNING: For reasons of safety, always follow these safety precautions.. 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. Releasing pressure see “STOP ENGINE BEFORE CAR- RYING OUT INSPECTION AND MAINTENANCE” on page 42. Never carry out inspection or replacement before releasing the pressure completely. A0055180 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. A0055190 If you are hit by a jet of high-pressure oil, consult a doctor immediately for medical attention. PRECAUTIONS WHEN CARRYING OUT MAINTENANCE AT HIGH TEMPERATURE Immediately after stopping operations, the engine coolant, oil at all parts, the exhaust manifold, and the muffler are at high temper- ature.
In this condition, if the cap is removed, or the oil is 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. Cleaning inside of cooling system see “WHEN REQUIRED” on page 194. A0055050 Checking coolant level, oil level in hydraulic tank see see “CHECK BEFORE STARTING” on page 103. Checking lubricating oil level, adding oil see "PERI- ODIC MAINTENANCE". Changing oil, replacing filters see "PERIODIC MAINTE- NANCE".
CHECKS AFTER INSPECTION AND MAINTENANCE Failure to carry out inspection and maintenance fully, or failure to check the function of various maintenance locations may cause unexpected problems and may even lead to personal injury or damage, so always do as follows. Checks when engine is stopped 50