Komatsu PC45MR-30403, Руководство по эксплуатации и обслуживанию

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METHOD FOR CLEANING INSIDE OF COOLING SYSTEM
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WARNING
• Immediately after the engine is stopped, the coolant is still hot and the pressure is accumulated in
the radiator.
If the cap is removed under this condition and the coolant is drained, it may cause burns.
Always wait for the temperature to go down, and turn the cap slowly to release the pressure.
• Start the engine and clean the inside of the cooling system.
When standing up or leaving the operator's seat, set the lock lever to LOCK position.
• Since the engine is operated during washing, it is dangerous to stand at the rear of the machine
when the machine moves accidentally.
Do not enter in the rear part of the machine when the engine is running.
Place the machine on a level ground when cleaning the inside of the cooling system or changing the coolant.
Clean the inside of the cooling system, or change the coolant according to the table below.
Coolant Interval for cleaning inside of cooling system and changing coolant
Non-Amine Engine Coolant (AF-NAC) Every 2 years or every 4000 hours whichever comes sooner
The coolant has the important function of preventing corrosion as well as preventing freezing.
Even in the areas where freezing is not an issue, the use of coolant is essential.
Komatsu machines are supplied with Non-Amine Engine Coolant (AF-NAC). Non-Amine Engine Coolant (AF-
NAC) has excellent anti-corrosion, antifreeze and cooling properties and can be used continuously for 2 years
or 4000 hours.
Komatsu recommends the use of Non-Amine Engine Coolant (AF-NAC). If you use another coolant, it may
cause serious problems, such as corrosion of the engine and aluminum parts of the cooling system.
To maintain the anti-corrosion properties of Non-Amine Engine Coolant (AF-NAC), always keep the density of
Non-Amine Engine Coolant in the range of 30 to 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 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
°F
14 or
more
5 -4 -13 -22 -31 -40 -49 -58
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, request a qualified company to perform the operation or contact your
Komatsu distributor.
Coolant is toxic, so never pour it into drainage ditches or drain it onto the ground surface.
MAINTENANCE MAINTENANCE PROCEDURE
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