Komatsu HB365LC-3 Operation & Maintenance Manual page 370

MAINTENANCE PROCEDURE
Density (%)
• 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 immediately.
• When handling the cooling water containing coolant that has been drained during changing the
coolant or repairing the radiator, contact your Komatsu distributor or request a qualified company
to perform the operation. Coolant is toxic, so never pour it into drainage ditches or drain it onto the
ground surface.
Non-Amine Engine Coolant (AF-NAC) is already diluted with distilled water, so it is not flammable.
Check the density with a coolant tester.
Prepare a container whose capacity is larger than the specified coolant volume to catch the drained coolant.
Clean the inside of the cooling system according to the following procedure.
Engine radiator cleaning
1.
Place the machine on a level ground, then stop the engine.
2.
Open the engine hood (1).
3.
Check that the coolant temperature is low enough to touch
the radiator cap surface by bare hand, turn the radiator
cap (2) slowly until it hits the stopper, and release the pres-
sure.
4.
While pushing the radiator cap (2), turn it until it hits the
stopper, then remove it.
4-22
30 36 41
k k
WARNING
46 50 54
MAINTENANCE
58 61 64