MAINTENANCE AFTER THE FIRST 50 OPERATING HOURS 26. MAINTENANCE AFTER THE FIRST 50 OPERATING HOURS All maintenance operations to be performed after 10 hours of operation also fall into this mainte- nance category. 26.1 ENGINE, CHANGING OIL AND RE- PLACING THE OIL FILTER CAR- TRIDGE Frequent skin contact with used engine oil may cause skin lesions! Thoroughly remove any engine oil adhering to your skin. Hot engine oil may cause scalding! Wear rubber gloves and place the oil trough under the dis- charge opening in such a way that you do not get in con- tact with the oil when it is running out. Do not perform an oil change, unless the engine is switched off and at operating temperature.
There is danger of severe accidents, if you perform main- tenance work at a machine that has not been parked and secured correctly! Park the machine on a solid, even surface and secure it, before you start to perform maintenance work. 1 1 - Before you start maintenance work, park and secure the machine as described in the chapter "22.1 Preparing the Machine for Maintenance". 2 - Loosen the screw (1) at the bottom cover plate (2) and swiv- el the cover plate to the side. 3 - Put the oil trough under the drain screw (4). 4 - Remove the cover cap (3) of the drain screw. 5 - Screw the drain hose (5) onto the drain plug (4). This will at the same time cause the drain valve to open.
6 - Let the oil drain off into the oil trough. 7 - Check the removed oil for metal parts or undesired material. If the oil contains such particles, inform the local Komatsu dealer. 8 - Remove the drain hose (5), this will cause the drain valve (4) to close. 9 - Screw on the cover cap (3). 10 - Fasten the bottom cover plate with the screw. 2 75_207 149