5.
Stop the engine and allow the engine to cool.
Loosen the cooling system filler cap slowly to
relieve any pressure. Remove the cooling system
filler cap. Open the drain cock or remove the drain
plug on the engine. Open the drain cock or remove
the drain plug on the radiator. Allow the water to
drain. Flush the cooling system with clean water.
6.
Close the drain cock or install the drain plug on the
engine. Close the drain cock or install the drain
plug on the radiator.
Fill
NOTICE
Do not fill the cooling system faster than 5 L
(1.3 US gal) per minute to avoid air locks.
Cooling system air locks may result in engine
damage.
1.
Fill the cooling system with Commercial Heavy-
Duty Coolant. Add Supplemental Coolant Additive
to the coolant. For the correct amount, refer to the
Operation and Maintenance Manual, “Fluid
Recommendations” topic (Maintenance Section)
for more information on cooling system
specifications. Do not install the cooling system
filler cap.
2.
Start and run the engine. The engine rpm will
increase to the operating speed of the engine. Run
the engine at operating speed for 1 minute to
purge the air from the cavities of the engine block.
Stop the engine.
3.
Check the coolant level. Maintain the coolant level
within 13 mm (0.5 inch) below the bottom of the
pipe for filling. Maintain the coolant level in the
expansion bottle (if equipped) at the correct level.
4.
Clean the cooling system filler cap. Inspect the
gasket that is on the cooling system filler cap. If
the gasket that is on the cooling system filler cap is
damaged, discard the old cooling system filler cap
and install a new cooling system filler cap. If the
gasket that is on the cooling system filler cap is not
damaged, use a suitable pressurizing pump to
pressure test the cooling system filler cap. The
correct pressure for the cooling system filler cap is
stamped on the face of the cooling system filler
cap. If the cooling system filler cap does not retain
the correct pressure, install a new cooling system
filler cap.
5.
Start the engine. Inspect the cooling system for
leaks and for correct operating temperature.
i07766364
Cooling
System
Coolant
(ELC)
-
Change
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to Local regulations
and mandates.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
Clean the cooling system and flush the cooling
system before the recommended maintenance
interval if the following conditions exist:
• The engine overheats frequently.
• Foaming is observed.
• The oil has entered the cooling system and the
coolant is contaminated.
• The fuel has entered the cooling system and the
coolant is contaminated.
Note:
Use non-foaming detergent to clean oil or fuel
contamination.
Note:
When the cooling system is cleaned, only
clean water is needed when the ELC is drained and
replaced.
Note:
Inspect the water pump and the water
temperature regulator after the cooling system has
been drained. This inspection is a good opportunity
to replace the water pump, the water temperature
regulator, and the hoses, if necessary.
NOTICE
Service or repair of the engine cooling system must
be performed on level ground. The engine must be
level to check the coolant level. The engine must be
level to avoid the risk of introducing an air lock into
the coolant system.
M0105633-01
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