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16. Idle the engine until the cooling fan rotates 2 ~ 3 times.
17. Stop the engine and wait until the engine and radiator
cool off.
18. Check the coolant level in the auxiliary tank and add coolant
repeatedly until the coolant level in the auxiliary tank
remains consistently between the upper and lower limits.
Note) Check the coolant level in the auxiliary tank for at least
2 ~ 3 days after changing the coolant.
CAUTION
Check the coolant level in the auxiliary tank for at least 2
~ 3 days after changing the coolant.
WARNING
Dispose of used coolant according to the regulations of
local public institutions. Coolant can cause severe envi-
ronmental pollution if it is spilled on the ground, in
drains, sewers, rivers, or seas. Failing to dispose of
coolant properly according to disposal regulations is
punishable by law.
Cleaning the Cooling Circuit
If the internal cooling circuit is corroded or contaminated, its
cooling efficiency is degraded. Resistance in the cooling
circuit can damage the mechanical seal of the coolant pump.
Using improper antifreeze or anti-corrosive or using products
without the correct properties can affect the cooling circuit
negatively. If the coolant pump leaks or coolant is severely
contaminated (cloudy or brown, gray or black according to its
contamination level) after a short period of operating time (6
months), wash the cooling system as follows before
removing the coolant pump. Wash the cooling system as
follows before removing the coolant pump:
1. Drain the coolant.
2. To wash the cooling circuit quickly, remove the thermo-
stat.
3. Fill the cooling circuit with a mixture of water and 1.5%
cleanser (Henkel P3T5175).
4. Apply a load to the engine. Once the coolant temperature
reaches 60 °C (140 °F), run the engine for approx. 15
minutes.
5. Drain the cleanser.
6. Repeat steps 3 and 4 above.
7. Fill the cooling circuit with hot water.
4. Regular Inspections
8. Idle the engine for 30 minutes and check the drain plugs
and coolant lines for leakage. Add coolant as necessary.
Wash the cooling circuit periodically using cleanser.
Coolant
1. The coolant used in the engine must be soft water, not
hard water.
2. You may dilute the engine coolant with 40% antifreeze
and 3 to 5% anticorrosive (DCA4).
3. Inspect the density of the above-mentioned solutions and
additives every 500 hours to maintain them at their
proper levels.
Note) If you maintain the density of the antifreeze and anti-
corrosive properly, you can effectively prevent corro-
sion and maintain stable engine quality.
Failing to maintain them may cause fatal damage to
the water pump and cylinder liner so particular care is
required.
4. The DX22 has a wet-type cylinder liner, so coolant must
be managed even more carefully.
5. You can check the density of antifreeze and anticorrosive
using a coolant test kit. (Fleetguard CC2602M)
6. How to use the coolant test kit
1) When the temperature of the engine coolant is 10 ~ 55 °C
(50 ~ 131 °F), remove the coolant drain plug and fill the
plastic cup around halfway.
35
CAUTION
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