
102
Maintenance Section
Cooling System Coolant Additive (DEAC) - Add
1. Slowly loosen the cooling system pressure cap
in order to relieve system pressure.
2. Open the drain valve on the bottom of the
radiator. The drain valve can be accessed from
the left side of the machine. Allow the coolant to
drain into a suitable container.
3. Flush the cooling system with clean water until
the draining water is clean. Close the drain valve.
4. Replace the water temperature regulator.
Reference: Refer to Operation and Maintenance
Manual, “Cooling System Water Temperature
Regulator - Replace” for the correct procedure.
5. Add the Extended Life Coolant.
Reference: Refer to Operation and Maintenance
Manual, “Capacities (Refill)” for the refill capacity
of the cooling system.
6. Start the engine. Run the engine without the
cooling system pressure cap until the water
temperature regulator opens and the coolant
level stabilizes.
7. Maintain the coolant level in the sight gauge of
the radiator.
8. Install the cooling system pressure cap. Stop the
engine.
i01558454
Cooling System Coolant
Additive (DEAC) - Add
SMCS Code: 1352-544
Pressurized system: Hot coolant can cause seri-
ous burn. To open cap, stop engine, wait until ra-
diator is cool. Then loosen cap slowly to relieve
the pressure.
NOTICE
Excessive additive (greater than the recommended
6% initial fill) together with concentrations of antifreeze
greater than 60% cause deposits to form and can re-
sult in radiator tube blockage and overheating.
NOTICE
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, test-
ing, adjusting and repair of the product. Be prepared to
collect the fluid with suitable containers before open-
ing any compartment or disassembling any compo-
nent containing fluids.
Refer to Special Publication, NENG2500, “Caterpillar
Tools and Shop Products Guide” for tools and supplies
suitable to collect and contain fluids on Caterpillar
products.
Dispose of all fluids according to local regulations and
mandates.
Note: This procedure pertains to Caterpillar Diesel
Engine Antifreeze/Coolant (DEAC) only. This
procedure does not pertain to machines that are
shipped from the factory with Extended Life Coolant
(ELC) or to machines that are maintained with
Extended Life Coolant (ELC).
Use an 8T-5296 Test Kit to check the concentration
of the coolant.
1. Open the rear engine hood. Slowly loosen the
cooling system pressure cap in order to relieve
system pressure. Remove the cooling system
pressure cap.
2. If necessary, drain enough coolant from the
radiator in order to allow the addition of the liquid
supplemental coolant additive. The coolant drain
valve is located on the bottom left side of the
radiator.
3. Add 0.24 L (0.25 qt) of liquid supplemental
coolant additive to the cooling system.
4. Clean the cooling system pressure cap and
install the cooling system pressure cap. Close
the engine hood.
i01558469
Cooling System Coolant
Extender (ELC) - Add
SMCS Code: 1352-544-NL
Pressurized system: Hot coolant can cause seri-
ous burn. To open cap, stop engine, wait until ra-
diator is cool. Then loosen cap slowly to relieve
the pressure.