Komatsu D375A-8, Operation & Maintenance Manual

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Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water. When using the 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 30 or more at least.
Coolant density table
Min. atmospheric tem-
perature
°C
-10 or
more
-15 -20 -25 -30 -35 -40 -45 -50
Density (%) 30 36 41 46 50 54 58 61 64
k k
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 immediately.
• When handling the cooling water containing coolant that has been drained during changing the
coolant or repairing the 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.
Check the density with a coolant tester.
Prepare a container whose capacity is larger than the specified coolant volume to catch the drained coolant.
Prepare a hose to add coolant.
1.
Stop the engine.
Wait for the coolant temperature to drop.
2.
Slowly turn the radiator cap (3) to remove.
MAINTENANCE MAINTENANCE PROCEDURE
4-21