Clean Inside Of Cooling System - Komatsu ecot3 GALEO HM300-2 Operation And Maintenance Manual

SERVICE PROCEDURE

CLEAN INSIDE OF COOLING SYSTEM

Immediately after the engine is stopped, the engine coolant is hot and the pressure inside the radiator is high. Removing the
cap and draining the water under this condition could cause burns. Allow the engine to cool down, then turn the cap slowly
to release the pressure.
Start the engine and flush the system. When standing up or leaving the operator's seat, set the shift lever to the N position and
set the parking brake switch to the PARKING position.
For details of starting the engine, see "OPERATIONS, CHECKS BEFORE STARTING (PAGE 3-84)" and "STARTING ENGINE
(PAGE 3-85)" in the OPERATION section of the Operation and Maintenance Manual.
When the undercover is removed, there is danger of touching the fan.
Never go to the front of the machine when the engine is running.
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%.
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.
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WARNING
Interval for 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
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MAINTENANCE
Replacing corrosion resistor
unnecessary
Every 1000 hours
and when cleaning the inside
of the cooling system
and when changing coolant