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18.
OUTLINES
OF SERVICE
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Before starting the engine, or when 10 minutes have passed after adding fuel, drain the sediment and water from
the fuel tank.
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If the engine runs out of fuel, or if the filters have been replaced, it is necessary to bleed the air from the circuit.
18.1.3 COOLANT
River water contains large amounts of calcium and other impurities, so if it is used, scale will stick to the engine
and radiator, and this will cause defective heat exchange and overheating.
Do not use water that is not suitable
for drinking.
When using antifreeze, always observe the precautions given in this Operation and Maintenance
Manual.
Komatsu machines are supplied with Komatsu original antifreeze in the coolant when the machine is shipped. This
antifreeze is effective in preventing corrosion of the cooling system. The antifreeze can be used continuously
for
two years or 4000 hours. Therefore, it can be used as it is even in hot areas.
Antifreeze is volatile, so be extremely careful not to expose it to flame or fire.
The proportion
of antifreeze to water differs according to the ambient temperature.
For details of the mixing
proportions, see 20.2.3 ANTIFREEZE.
If the engine overheats, wait for the engine to cool before adding coolant.
If the coolant level is low, it will cause overheating and will also cause problems with corrosion from the air in the
coolant.
18.1.4 GREASE
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Grease is used to prevent twisting and noise at the joints.
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The nipples not included in the maintenance section are nipples for overhaul, so they do not need grease. If any
part becomes stiff after being used for a long time, add grease.
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Always wipe off all of the old grease that is pushed out when greasing. Be particularly careful to wipe off the old
grease in places where sand or dirt sticking in the grease would cause wear of the rotating parts.
18.1.5 STORING OIL AND FUEL
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Keep indoors to prevent any water, dirt, or other impurities from getting in.
+
When keeping drum cans for a long period, put the drum on its side so that the filler port of the drum can is at the
side, to prevent moisture from being sucked in. If drum cans have to be stored outside, cover them with a
waterproof sheet or take other measures to protect them.
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To prevent any change in quality during long-term storage, be sure to use in the order of first in - first out (use the
oldest oil or fuel first).
18.1.6 FILTERS
Filters are extremely
important safety parts. They prevent impurities in the fuel and air circuits from entering
important equipment and causing problems. Replace all filters periodically. For details, see the procedures in this
Operation and Maintenance
Manual. However, when working in severe conditions,
it is necessary to consider
replacing the filters at shorter intervals according to the oil and fuel (sulfur content) being used.
Never try to clean the filters (cartridge type) and use them again. Always replace with new filters.
When replacing oil filters, check if any metal particles are stuck to the old filter. If any metal particles are found,
please contact your Komatsu distributor.
Do not open packs of spare filters until just before they are to be used.
Always use Komatsu genuine filters.
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