4. Regular Inspections
34
Add Coolant
If the coolant level indicated on the auxiliary tank is below the
lower limit, add coolant as follows.
1. Remove the cap on the auxiliary tank.
2. Add coolant until the coolant level is between the upper
and lower limits on the auxiliary tank.
3. Install the cap on the auxiliary tank.
If there is no coolant in the auxiliary tank, add coolant as
follows.
1. Remove the radiator cap while the engine and radiator
are cold.
2. Add coolant up to the radiator inlet.
3. Start the engine; then, check the coolant level after circu-
lating the coolant sufficiently. Add more coolant if neces-
sary.
4. Install the radiator cap.
5. Remove the cap on the auxiliary tank.
6. Add coolant until the coolant level is between the upper
and lower limits on the auxiliary tank.
Replacing Coolant
1. Check whether the engine and radiator are cold.
2. Place a container in front of the coolant drain plug.
3. Remove the radiator cap.
4. Remove the coolant drain plug from the radiator and
drain the coolant.
5. After draining the coolant, reinstall the coolant drain plug.
6. Drain the coolant from the auxiliary coolant tank and
wash out the tank.
7. Fill the radiator inlet with water and install the radiator
cap.
Note) After adding coolant slowly to allow air inside the radi-
ator to be discharged, press on the hose connected to
the radiator to drain the air inside more easily.
8. Run the engine until the cooling fan rotates 2 ~ 3 times.
Then, increase the engine rpm 2 ~ 3 times once the engine
has warmed up.
9. Stop the engine and wait until the engine cools off.
10. Remove the radiator drain plug and drain the water.
11. Repeat steps 1 ~ 8 until the water drained is clean.
12. Press on the hose connected to the radiator to drain the
air in the radiator more easily; then, slowly fill the radiator
inlet with coolant mixed to the specified ratio
Note) Make sure to use genuine antifreeze recommended
by Hyundai Doosan Infracore.
13. Idle the engine after starting it. Once the cooling fan is
running and coolant has circulated, remove the radiator
cap and add coolant through the inlet.
14. Add coolant until the cooling fan rotates 3 ~ 5 times.
15. Add coolant up to the upper limit on the auxiliary tank;
then, install the radiator cap.
Be careful not to allow foreign matter to enter the engine
while adding coolant.
• Do not open the radiator cap while the engine is over-
heated. Otherwise, hot coolant will spurt out and may
cause severe burns. Open the radiator cap only after
ensuring that the engine has cooled off sufficiently.
• Label and store coolant containers separately to
avoid confusion with beverage containers. If coolant
is ingested, seek medical assistance immediately.
Be careful not to spill coolant on any belts or electrical
components when replacing the coolant.
• Do not use a mixture of antifreezes from different
manufacturers.
• Do not use a mixture of coolants with different
concentrations.
• Do not add an anti-rust agent which is not recom-
mended by Hyundai Doosan Infracore.
• A low coolant concentration may cause corrosion or
freezing, whereas a high concentration may degrade
cooling performance. Use a mixture of 40% anti-
freeze in coolant.
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