Komatsu HM400-5, Руководство по эксплуатации и техническому обслуживанию

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To maintain the anti-corrosion properties of Non-Amine Engine Coolant (AF-NAC), always keep the density of
Non-Amine Engine Coolant between 30 % and 64 %.
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water. When using coolant, investigate the
lowest temperature in the past and decide the density for the coolant from the coolant density table below.
When deciding the density for the coolant, set it for a temperature 10 °C below the actual lowest temperature in
the working area.
The coolant density varies according to the ambient temperature, but it must be over 30 % at least.
Coolant density table
Min. atmospheric tem-
perature
°C Min. -10 -15 -20 -25 -30 -35 -40 -45 -50
Density (%) 30 36 41 46 50 54 58 61 64
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WARNING
• Coolant is toxic.
When opening the drain valve, be careful not to get coolant on you.
If it gets in your eyes, flush your eyes with large amount of fresh water and see a doctor immediate-
ly.
• When handling the cooling water containing coolant that has been drained during changing the
coolant or repair of radiator, contact your Komatsu distributor or request a qualified company to
perform the operation.
Coolant is toxic, so never pour it into drainage ditches or drain it onto the ground surface.
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable.
For dilution, see “COOLANT AND WATER FOR DILUTION (4-6)”.
Check the density with a coolant tester.
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CAUTION
• If the air in the engine cooling system has not been completely bled, it may cause damage of EGR
cooler and it may lead to serious failure such as seizure inside of the engine. Therefore, be sure to
check the coolant level or add coolant immediately after changing the coolant, and bleed air thor-
oughly according to the following procedure.
Before starting the work, be sure to perform METHOD FOR CHECKING COOLANT LEVEL, ADDING
COOLANT (3-155).
• After changing the coolant, as time passes, the coolant level of reservoir tank may drop largely. Op-
eration with low coolant level may cause damage of EGR cooler in the worst case, and it may lead
to serious failure such as seizure inside of the engine.
If an alarm (failure code B@BCZK) is generated due to the drop of the coolant level of the reservoir
tank, or before starting the engine at the next day of the coolant change, be sure to perform METH-
OD FOR CHECKING COOLANT LEVEL, ADDING COOLANT (3-155).
Refill amount of coolant 114 ℓ
Items to be prepared
• A container whose capacity is enough to receive the specified capacity of coolant
• A hose to add coolant
MAINTENANCE PROCEDURE MAINTENANCE
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