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SERVICE PROCEDURE
The freezing temperature of undiluted antifreeze is -15°C (5°F). Do not store undiluted antifreeze at a temperature
of below -15°C (5°F).
Mixing rate of water and antifreeze
Min. atmospheric
temperature
Amount of antifreeze
Amount of water
Super coolant is flammable, so be particularly careful to keep it away from flame.
Super coolant is toxic. When removing the drain plug, be careful not to get coolant on yourself.
If it gets into your eyes, wash your eyes immediately with ample water, then consult a doctor for treatment.
NOTICE
Please use Komatsu genuine supercoolant (AF-NAC) for the coolant. As a basic rule, we do not recommend the use of any coolant
other than Komatsu genuine supercoolant.
Always use city water to dilute the coolant. If river water or well water or a simple water supply must be used, please
consult your Komatsu distributor.
We recommend the use of a super coolant density meter to control the mixing ratio.
1. Turn cap (3) of the radiator water filler slowly.
2. Set a container to catch the coolant under drain valve (4) at the
bottom of the radiator.
3. Open drain valve (4) and drain the water.
4. After draining the coolant, close drain valve (4), and fill with city
water. When the radiator is full, start the engine and run at low
idling to raise the temperature to at least 90°C (194°F), then
continue to run for approx. 10 minutes.
5. Stop the engine, open drain valve (4), and drain the water.
6. After draining the water, clean the radiator with detergent.
When carrying out the flushing operation, follow the
instructions given with the flushing agent.
7. Close drain valve (4) and add water to near the mouth of the water filler.
8. To bleed the air mixed in the coolant, run the engine at low
idling for 5 minutes, then run for a further 5 minutes at high
idling.
(When doing this, leave the water filler cap off.)
9. Drain the coolant inside sub-tank (5), flush the inside of
sub-tank (5), then add water to between the FULL and LOW
marks.
10. Stop the engine, wait for approx. 3 minutes, then add water to
near the mouth of the water filler and tighten cap (3).
4 - 22
° C
-10
-15
° F
14
5
liter
32.1
38.5
US gal
8.48
10.17
liter
74.9
68.5
US gal
19.79
18.10
-20
-25
-30
-4
-13
-22
42.8
49.2
53.5
11.31
13.00
14.13
64.2
57.8
53.5
16.96
15.27
14.13
WARNING
MAINTENANCE
-35
-40
-31
-40
57.8
62.1
15.27
16.41
49.2
44.9
13.00
11.86
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