MACHINE OPERATIONS AND CONTROLS 3.3 MACHINE OPERATIONS AND CONTROLS 3.3.1 BEFORE STARTING ENGINE 3.3.1.1 WALK-AROUND CHECKS Before starting the engine, look around the machine and under the machine to check for loose nuts or bolts, or leakage of oil, fuel, or coolant, and check the condition of the work equipment and hydraulic system. Check also for loose wiring, play, and accumulation of dust in places which reach high temperatures. When opening the engine rear cover and the cooling co- ver to carry out checks and maintenance operations, always remember to secure them in the correct position with the apposite retainer.
Immediately remove any flammable materials that have accumulated around the battery or engine muffler and other high temperature parts of the engine. Leakage of oil and fuel will cause the machine to catch fire. Always check thoroughly and repair any problems or contact your Komatsu distributor. Check that the floor is secured properly by bolts (1). If it is not secured properly, it may cause serious personal injury. If the machine is at an angle, reposition it level before checking. Carry out the following inspections and cleaning every day be- fore starting the engine for the day's work. 1. Check for damage, wear, play in work equipment, cylin- ders, linkage, and hoses.
Check that there are no cracks, excessive wear, or play in the work equipment, cylinders, linkage, or hoses. If any abnormality is found, repair it. 2. Remove dirt and dust from around engine, battery, and radiator. Check that there is no dirt or dust accumulated around the engine or radiator. Check also that there is no flammable material (dry leaves, twigs, etc.) accumulated around the engine muffler or high temperature parts of the engine, or around the battery. Remove all dirt, dust, and flammable materials. 3. Check for leakage of water or oil around engine. Check that there is no leakage of oil from the engine or leakage of water from the cooling system.
If any ab- normality is found, repair it. 4. Check for oil leakage from hydraulic equipment, hydraulic tank, hoses, joints Check that there is no oil leakage. If any abnormality is found, repair the place where the oil is leaking. 5. Check of the undercarriage parts. Check track shoe, sprocket, idler, guard for damage, wear, loose bolts, or leakage of oil from rollers, etc. Repair them if any trouble is found. 6. Check of the handrails and steps. Check the handrails and steps for any damage or loosened bolts, and repair the damaged part and tighten the loosened bolts, if any. 7. Check for abnormality in gauges and monitor.
Check that there is no abnormality in the gauges and monitor in the operator's cab. If any abnormality is found, replace the parts. Clean off any dirt on the surface. 8. Seat belt and mounting clamps. Check that there is no abnormality in the seat belt or mounting clamps. If there is any damage, replace with new parts. 90 WARNING