. MAINTENANCE SECONDARY MATERIALS FOR OPERATION 4 - 12 FUEL After completing the day's operations, fi ll the fuel tank to force out any air containing moisture. This will prevent the moisture from condensing and mixi ng with the fuel. t, and if fuel containing water or dirt is used, it cannot work properly. s get in when storing or adding fuel. mperature in the Operation and Maintenance Manual. The fuel pump is a precision instrumen t, and if fuel containing water or dirt is used, it cannot work pr Be extremely careful not to let impuritie Always use the fuel specified for the te If the fuel is used at temperatures low °C (5°F), the fuel will solidify.
If the fuel is used at temperatures hi result in problems such as a drop in If the fuel is used at temperatures low er than the specified temperature (particularly at temperature s below -15 If the fuel is used at temperatures hi gher than the specified temperature, the viscosity will drop, a nd this may output. Before starting the engine, or when 10 m inutes have passed after adding fuel, drain the sediment and water from the fuel tank. If the engine runs out of fuel, or if the fil ters have been replaced, it is necessary to bleed the air from the circuit. If there is any foreign material in the fue l tank, wash the tank and fuel system.
Excess fuel in the tank may spill out due to thermal expansion when the fuel temperature rises. Be ca reful not to fill with too much fuel. NOTICE Use only diesel fuel. The engine mounted on this machine employs electronic control and a high-pressure fuel injection device to obta in good fuel consumption and good exhaust gas characteris tics. For this reason, it requires high precision for the parts and good lubrication. If kerosene or other fuel with low lubricating ab ility is used, there will be a big drop in durability. COOLANT AND WATER FOR DILUTI ON AF-NAC) has the important function of preventing corrosion as well as an issue, the use of antifreeze coolant is essential.
Komatsu genuine SUPERCOOLANT ( preventing freezing. Even in the areas where freezing is not an issue, the use of antifreeze coolant is essential Komatsu machines are supplied with Ko matsu SUPERCOOLANT (AF-NAC). SUPERCOOLANT (AF -NAC) has excellent anticorrosion, antifreeze and c ooling propertiesand can be used continuously for 2 years or 4 000 hours. As a basic rule, we do not recommend t he use of any coolant other than SUPERCOOLANT (AF-NAC) . If you use another coolant, it may cause serious cooling system. problems, such as corrosion of the engine and aluminum parts of the the precautions given in the Operation and Maintenance Manual. water, so it is not flammable.
according to the ambient temperature. , see "CLEAN INSIDE OF COOLING SYSTEM (PAGE 4-30)". When using antifreeze, always observe the precautions given in the Operation and Maintenance Ma Coolant is already diluted with distilled The density used for the coolant differs For details of the density of the coolant , see "CLEAN INSIDE OF COOLING SYSTEM (PAGE 4-30) Even in the areas where it is not consid ered necessary to prevent freezing, always use coolant with a density of over 30% in order to prevent corrosion of the cooling system. coolant is diluted with distilled water tha t does not contain any ions or water-hardening substances. N ever dilute the coolant with ordinary water.
ine to cool before adding coolant. If the engine overheats, wait for the eng If the coolant level is low, it will cause ov erheating, and will also cause problems with corrosion due to air entering the coolant.