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MAINTENANCE
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)
Density (%)
Clean the inside of the cooling system according to the following procedure.
1.
Place the machine on a level ground, then stop the engine.
2.
Open engine hood (1).
3.
Check that the coolant temperature is low enough to make
it possible to touch the radiator cap surface by bare hand,
turn radiator cap (2) slowly until it hits the stopper, and re-
lease the pressure.
4.
While pushing radiator cap (2), turn it until it touches to the
stopper, then remove it.
5.
Remove the undercover, then place the container under
drain valve (3) to receive the coolant.
6.
Open drain valve (3) to drain the coolant.
7.
After draining the coolant, close drain valves (5) and (6)
and fill with city water.
Pour water until it fills the radiator.
8.
Start the engine.
For details of starting the engine, see OPERATION,
"METHOD FOR OPERATIONS AND CHECKS BEFORE
STARTING ENGINE" and "METHOD FOR STARTING EN-
GINE".
9.
Run at low idle for approximately 10 minutes.
°C
Min. -10
-15
30
36
-20
-25
-30
41
46
50
MAINTENANCE PROCEDURE
-35
-40
-45
54
58
61
-50
64
4-21
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