Clean Inside Of Cooling System - Komatsu ecot 3 Operation & Maintenance Manual

MAINTENANCE

CLEAN INSIDE OF COOLING SYSTEM

Immediately after the engine is stopped, the cooling water is at high temperature and the radiator is under high internal
pressure. If the radiator cap is removed in this condition and the water is drained, it may cause burns. To prevent this, wait
for the temperature to go down, then turn the cap slowly to release the internal pressure.
Start the engine and clean the inside of the cooling system.. When standing up or leaving the operator's seat, set the work
equipment lock lever and parking brake lever to the LOCK position.
For details when starting the engine, see "CHECK BEFORE STARTING ENGINE, ADJUST (PAGE 3-69)" and "STARTING ENGINE
(PAGE 3-86)".
If the undercover is removed, there is danger of touching the fan.
Never enter the area at the rear of the machine when the engine is running.
Stop the machine on level ground when cleaning or changing the coolant.
Clean the inside of the cooling system, change the coolant according to the table below.
Antifreeze coolant
Komatsu supercoolant
(AF-NAC)
*1: When using Komatsu Supercoolant (AF-NAC), there is no need to use a corrosion resistor.
When no corrosion resistor is used, use the special cover (600-411-9000). Please consult your Komatsu
distributor about the method of installing.
When using corrosion resistor, use Komatsu genuine corrosion resistor. If you use another corrosion resistor,
it may cause serious problems such as corrosion of the engine and parts of the cooling system that use light
metals such as aluminum.
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 antifreeze coolant is essential.
Komatsu machines are supplied with Komatsu Supercoolant (AF-NAC). Komatsu Supercoolant (AF-NAC) has
excellent anticorrosion, antifreeze and cooling properties and can be used continuously for 2 years or 4000 hours.
As a basic rule, we do not recommend the use of any coolant other than Komatsu genuine supercoolant (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.
WARNING
Interval for cleaning inside of cooling system
and changing antifreeze coolant
Every two years or every 4000 hours
whichever comes first
SERVICE PROCEDURE
Precautions for use
1*
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