SERVICE PROCEDURE MAINTENANCE
4-24
When deciding the ratio of antifreeze to water, check the lowest temperature in the past, and decide from the mix-
ing rate table given below.
It is actually better to estimate a temperature about 10°C (50°F) lower when deciding the mixing rate.
Mixing rate of water and antifreeze
WARNING
Antifreeze is flammable, so keep it away from flame.
Antifreeze is toxic. When removing the drain plug, be careful not to get water containing antifreeze on
you. If it gets in your eyes, flush your eyes with large amount of fresh water and see a doctor at once.
Use city water for the cooling water.
If river water, well water or other such water supply must be used, contact your Komatsu distributor.
We recommend use of an antifreeze density gauge to control the mixing proportions.
q Prepare a container to catch drained coolant: Min 20 liters (5.28 US gal) capacity.
q Prepare a water inlet hose.
1. Stop the engine.
2. To loosen and remove the radiator cap, use a suitable
climbing aid (for example a ladder) to climb up the back of
the machine.
3. Check that the cooling water temperature has gone down
enough to make it possible to touch the radiator cap sur-
face by hand, then turn radiator cap (1) slowly until it con-
tacts the stopper to release the pressure.
4. Following this, push radiator cap (1), turn it until it contacts
the stopper, then remove it.
Min. atmospheric
temperature
°C -10 -15 -20 -25 -30
°F 14 5 -4 -13 -22
Amount of anti-
freeze
Liter 6.0 7.2 8.2 9.1 10.0
US gal 1.59 1.90 2.17 2.40 2.64
Amount of water
Liter 14.0 12.8 11.8 10.9 10.0
US gal 3.69 3.38 3.11 2.88 2.64
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