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MAINTENANCE
Coolant is toxic. Be careful not to get coolant on you when opening the drain valve.
If it gets in your eyes, flush your eyes with large amount of fresh water and see a doctor at once.
Ask a specialist company or contact your Komatsu distributor for performing the change of coolant or disposal of the cooling
water containing coolant that has been drained during repair of radiator. Coolant is toxic. Do not let it flow into drainage ditches
or spray it onto the ground surface.
Coolant is already diluted with distilled water, so it is not flammable. (For details of the distilled water, see
"COOLANT AND WATER FOR DILUTION (PAGE 4-6)". ) Check the density with a coolant tester.
Prepare a container whose capacity is larger than the specified coolant volume to catch drained coolant.
Prepare a hose to use when refilling with coolant.
1. Stop the machine on level ground, then stop the engine.
2. Turn radiator cap (3) slowly, and remove.
3. Prepare a container to catch the drained coolant, then open
radiator drain valves (4) and (5) at the bottom of the radiator,
and drain the coolant.
4. After draining the coolant, close drain valves (4) and (5), then
fill with city water.
5. When the radiator is filled with water, start the engine and run
it at Low idle (MIN) for approximately 10 minutes.
6. Open drain valves (4), (5), and drain the water.
7. After draining the water, clean it with detergent liquid.
For the cleaning method, follow the instruction for the
detergent liquid.
8. Close drain valves (4) and (5).
9. Add coolant through the water filler port up to the mouth of the port. For details of the coolant density, see
"COOLANT DENSITY TABLE".
10. To remove air in the cooling system, run the engine for 5 minutes at low idle, then for 5 minutes at high idle.
(While doing this, leave the radiator cap removed.)
WARNING
SERVICE PROCEDURE
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