Komatsu PW118MR-11 Operation & Maintenance Manual page 348

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 liquid that has been drained during the replacement of the coolant or repair of
radiator, request a qualified company to perform the operation or contact your Komatsu distributor.
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 "HANDLE OIL, FUEL, COOLANT, AND PERFORMING OIL CLINIC".)
Check the density with a coolant tester.
Prepare a container whose capacity is larger than the coolant volume to catch drained coolant.
Prepare a hose to fill with coolant and water.
1.
Stop the engine.
2.
Remove the screws (1) and the cover (2).
3.
Remove the screws (3) and the cover (4).
4.
Check that the coolant temperature is low enough to touch
the radiator cap surface by bare hand, turn the radiator
cap (5) slowly until it hits the stopper, and release the pres-
sure.
5.
Then, while pushing radiator cap (5), turn it until it touches
the stopper, and remove it.
4-20
k k
WARNING
WENAM00130
MAINTENANCE
RKA65110
RKA65140
RKA65120