. MAINTENANCE OUTLINES OF SERVICE 4 - 5 FUEL To prevent the moisture in the air from condens ing and forming water inside the fuel tank, always fill the fuel tank after completing the day's work. fuel containing water or dirt is used, it cannot work properly. when storing or adding fuel. re in the Operation and Maintenance Manual. The fuel pump is a precision instrument, and if fuel containing water or dirt is used, it cannot work properly. Be extremely careful not to let impurities get in Always use the fuel specified for the temperatu If the fuel is used at temperatures lower than °C (5°F), the fuel will solidify.
If the fuel is used at temperatures higher tha result in problems such as a drop in output. If the fuel is used at temperatures lower than the specified temperature (particularly at temperatures below -15 If the fuel is used at temperatures higher tha n the specified temperature, the viscosity will drop, and this may Before starting the engine, or when 10 minutes have passed after adding fuel, drain the sediment and water f rom the fuel tank. If the engine runs out of fuel, or if the filters hav e been replaced, it is necessary to bleed the air from the circuit. If there is any foreign material in the fuel tank, wash the tank and fuel system. NOTICE Always use diesel oil for the fuel.
To ensure good fuel consumption characteristics and e xhaust gas characteristics, the engine mounted on this machine use s an electronically controlled high-pressure fuel injection de vice. This device requires high precision parts and lubrication, so i f low viscosity fuel with low lubricating ability is used, the du rability may drop markedly. COOLANT AND WATER FOR DILUTION enting corrosion as well as preventing freezing. e, the use of antifreeze coolant is essential. The coolant has the important function of prev Even in the areas where freezing is not an issu Komatsu machines are supplied with Komatsu Supercoolant (AF-NAC).
Komatsu Supercoolant (AF-NAC) has excellent anticorrosion, antifreeze and cooling p ropertiesand can be used continuously for 2 years or 4000 hours. Komatsu Supercoolant (AF-NAC) is strongly re commended wherever available. , there is no need to use a corrosion resistor. For details, see GE 4-21)". ed water or tap water (soft water). ater (hard water), contains large amounts of minerals (calcium, When using Komatsu Supercoolant (AF-NAC) "CLEAN INSIDE OF COOLING SYSTEM (PA When diluting the antifreeze coolant, use distill Natural water, such as a river water or well w magnesium, etc.), and this makes it easier for s cale to form inside the engine or radiator.
Once scale is deposited inside the engine or radiator, it is extremely d ifficult to remove. It also causes overheating due to poor heat exchange, so when you dilute the coolant, we recommend that you use water with an overall hardness of less cautions given in the Operation and Maintenance Manual. keep it away from flame. iffers according to the ambient temperature. N INSIDE OF COOLING SYSTEM (PAGE 4-21)". dy mixed. In such cases, never dilute with water. ool before adding coolant. less than 100 PPM.
When using antifreeze, always observe the pre Antifreeze coolant is flammable, so be sure to The ratio of Supercoolant (AF-NAC) to water d For details of the ratio when mixing, see "CLEA Supercoolant (AF-NAC) may be supplied alrea If the engine overheats, wait for the engine to c If the coolant level is low, it will cause overheati ng, and will also cause problems with corrosion due to air entering the coolant.