TM 5-3895-383-24
Cooling System Coolant (DEAC) - Change
SMCS Code: 1352-544, 1395-044
Personal injury can result from hot coolant, steam and
alkali.
At operating temperature, engine coolant is hot and under
pressure. The radiator and all lines to heaters or the
engine contain hot coolant or steam. Any contact can
cause severe burns.
Remove cooling system pressure cap slowly to relieve
pressure only when engine is stopped and cooling system
pressure cap is cool enough to touch with your bare hand.
Do not attempt to tighten hose connections when the
coolant is hot, the hose can come off causing burns.
Cooling System Coolant Additive contains alkali. Avoid
contact with skin and eyes.
NOTE:
This procedure pertains to Caterpillar Diesel
Engine Antifreeze/Coolant (DEAC) only. This
does not pertain to machines that are shipped
from the factory with Extended Life Coolant (ELC).
This does not pertain to machines that are
maintained with Extended Life Coolant (ELC).
NOTICE
Do not change the coolant until you read and understand
the material in the Cooling System Specifications section.
NOTICE
Care must be taken to ensure that fluids are contained
during performance of inspection, maintenance, testing,
adjusting and repair of the product. Be prepared to collect
the fluid with suitable containers before opening any
compartment or disassembling any component 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.
If the coolant is dirty or If you observe any foaming in the
cooling system, drain the coolant before the recommended
interval.
It is important to replace the thermostat in order to avoid any
unexpected failure of the thermostat. This is a good preventive
maintenance
practice
that
reduces
the
chances
of
unscheduled downtime. Failure to replace the thermostat on a
regularly scheduled basis could cause severe engine damage.
NOTE:
If you are only replacing the thermostat drain the
coolant from the cooling system so that the level
of the coolant is below the thermostat housing.
Always operate Caterpillar engines with a thermostat because
these engines have a shunt design cooling system.
NOTE:
Thermostats can be reused if the thermostats
meet certain test specifications. The tested
thermostats must not be damaged and the tested
thermostats must not have an excessive buildup
of deposits.
1.
Stop the engine and allow the engine to cool.
Illustration 142
2.
Open the engine compartment.
Illustration 143
Maintenance Section
Cooling System Coolant (DEAC) - Change
1-68
