Komatsu WA480-8 Operation & Maintenance Manual page 345

MAINTENANCE
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. (For dilution
water, see "COOLANT AND WATER FOR DILUTION".)
Check the density with a coolant tester.
Prepare a container whose capacity is larger than the specified coolant volume to catch the drained coolant.
Prepare a hose to fill with coolant and water.
1.
Stop the engine.
2.
Remove the radiator top cover (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.
Then, while pushing the radiator cap (2), turn it until it
touches the stopper, and remove it.
5.
Prepare a container to catch the drained coolant.
6.
Open the drain valve (3) on the left of fuel tank, drain plug
(4) on the side of cylinder block, and drain plug (6) behind
the cover (5) on the bottom of radiator, and drain the cool-
ant.
7.
Tighten the drain valve (3), drain plug (4), and drain plug
(6), then add city water.
Add water until it fills the radiator.
8.
Start the engine.
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WARNING
MAINTENANCE PROCEDURE
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