Clean Inside Of Cooling System - Komatsu GALEO D65EX-15 Operation & Maintenance Manual

MAINTENANCE

CLEAN INSIDE OF COOLING SYSTEM

Just after the engine is stopped, the coolant is still hot and the internal pressure in the radiator is still high. If the radiator cap
is removed under this condition, you may scald yourself. Accordingly, wait until the temperature goes down, then loosen the
cap slowly to release the pressure.
Start the engine to clean the cooling system. When standing up from the operator's seat or leaving the machine, set the work
equipment lock lever and parking brake lock lever to the LOCK positions.
For the starting method of the engine, see "CHECK BEFORE STARTING ENGINE, ADJUST (PAGE 3-66)" and "STARTING
ENGINE (PAGE 3-82)" in the OPERATION section of the manual.
Never go under the machine body while the engine is running. It is very dangerous since the machine may move suddenly.
Clean the inside of the cooling system, change the coolant and replace the corrosion resistor according to the table
below.
Antifreeze coolant
Komatsu supercoolant
(AF-NAC)
Permanent type antifreeze
(All-season type, *)
*: Permanent type antifreeze shall meet the requirements of ASTM D3306-03.
Stop the machine on level ground when cleaning or changing the coolant.
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.
Komatsu Supercoolant (AF-NAC) is strongly recommended wherever available.
To maintain the anticorrosion properties of Supercoolant (AF-NAC), always keep the density of Supercoolant
between 30% and 68%.
WARNING
Interval of cleaning inside of cooling system
and changing antifreeze coolant
Every two years or every 4000 hours
whichever comes first
Every year (autumn) or every 2000 hours
whichever comes first.
SERVICE PROCEDURE
Replacing corrosion resistor
Every 1000 hours
and when cleaning the inside
of the cooling system
and when changing coolant.
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