MAINTENANCE NOTES
193
4.2.1.2 FUEL
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Always use fuel suitable for the engine. Other fuels with different specifications may damage the engine or re-
duce its power.
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Always refuel at the end of the workday.
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When refuelling, make sure that there is no water on the fuel drum cover and take care not to draw condensate
from the drum bottom.
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If fuel runs out, or if the fuel filter has been replaced, it is necessary to bleed the circuit.
4.2.1.3 COOLANT
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The coolant is used to keep the engine at the right temperature and in ideal working conditions; check the level
in the expansion tank daily and, if required, refill with coolant to the correct concentration according to the mini-
mum atmospheric temperature. For concentration, see "4.4.1 COOLANT".
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The coolant containing antifreeze is flammable; do not use naked flames near the coolant and do not smoke
while topping up.
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Use only Komatsu original permanent antifreeze coolant (AF-NAC), an ethylene glycol-based solution with anti-
corrosive and antifoam products compatible with aluminium radiators.
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The use of permanent antifreeze requires only the check of the level and the periodical change of the fluid. It is
not necessary to wash the cooling circuit.
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Use drinkable water and in any case soft water.
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Do not use corrosion inhibitors containing soluble oil, since they damage the rubber couplings.
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In case of doubt regarding the applicable standards for the use of coolant, contact your Komatsu Distributor, who
will supply you with exhaustive and precise information.
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