Komatsu PC220LC -8 Operation & Maintenance Manual page 289

MAINTENANCE PROCEDURE
To maintain the anticorrosion properties of Supercoolant (AF-NAC), always keep the density of Supercoolant
between 30% and 68%.
Supercoolant (AF-NAC) is already diluted with distilled water. When using coolant, investigate the lowest
temperatures in the past and decide the density for the coolant from the coolant density table below.
When actually deciding the density for the coolant, set it for a temperature 10°C (18°F) lbelow the actual
temperature.
The coolant density varies according to the ambient temperature, but it must always be a minimum of 30%.
Coolant density table
° C
Minimum Temp
° F
Concentration (%)
Antifreeze is toxic. When open the drain valve, be careful not to get water containing antifreeze on you. If it gets in your eyes,
flush your eyes with large amount of fresh water and see a doctor at once.
When changing the coolant or draining the coolant from the radiator before carrying out repairs, ask a specialist company to
handle any coolant containing antifreeze, or contact your Komatsu distributor. Antifreeze is toxic, so never pour it into
drainage water ditches or drain it onto the ground surface.
The coolant is already diluted with distilled water. (For details of the distilled water, see "COOLANT AND WATER
FOR DILUTION (PAGE 4-5)". Check the density with a coolant tester.
Prepare a container whose capacity is larger than the specified coolant volume to catch drained coolant.
Prepare a hose to use when filling with coolant.
4 - 28
Above -10 -15 -20
Above 14 5 -4
30 36 41
-25 -30
-13 -22
46 50
WARNING
MAINTENANCE
-35 -40 -45
-31 -40 -49
54 58 61
-50
-58
64