Komatsu H70051 Series Operation & Maintenance Manual page 334

MAINTENANCE PROCEDURE
• 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 (4-6)".)
Check the density with a coolant tester.
Items to be prepared
• A container whose capacity is enough to receive the specified capacity of coolant
• A hose to add coolant
1.
Place the machine on a level ground, then 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.
Open the engine side cover (3) on the left side of the ma-
chine.
6.
Prepare a container to catch the coolant.
4-22
k k
WARNING
MAINTENANCE