life coolant (ELC) formulation at a 50:50
coolant-to-distilled water mixture. The
factory fill exceeds ASTM D6210 and
Caterpillar EC-1 requirements. Maintaining
coolant chemistry and freeze protection is
critical to engine and cooling system
component health and longevity.
WARNING
Coolant is toxic. DO NOT get the fluid
in eyes. If contact occurs, flood eyes
with large amounts of water for 15 mi-
nutes. Avoid prolonged or repeated
contact with skin. In case of contact,
immediately wash skin with soap and
water. DO NOT take internally. If swal-
lowed, seek immediate medical atten-
tion. DO NOT induce vomiting. Failure
to comply may result in death, person-
al injury, equipment or property dam-
age.
CAUTION
The engine cooling system has very
specific maintenance and inspection
requirements. Failure to follow require-
ments can damage the engine. Engine
damage can include but is not limited
to freezing, boiling, corrosion, pitted
cylinder liners. This information is
found in the engine manufacturers
owner’s manual. It is the owner’s re-
sponsibility to follow all requirements
listed in the engine manufacturers
owner’s manual.
NOTE
Coolant is harmful to the environment.
Unused coolant must be stored as a
toxic hazardous material in leakproof
containers. Used coolant must be
processed as industrial chemical
waste. Please follow HAZMAT guide-
lines with both used and unused cool-
ants.
CAUTION
Use of non-genuine PACCAR coolant
filters may cause severe engine dam-
age.
Concentration
Check the level of freeze/boil over
protection, which is determined by the
glycol concentration. Use a glycol
refractometer to determine glycol level.
Add coolant to obtain the coolant/water
ratio required to provide the protection you
need. A 50/50 mix of coolant and water is
adequate for most applications. For
extremely cold operating conditions, the
ratio can be adjusted to a higher
concentration of coolant.
NOTE
Maximum recommended ELC concen-
tration is 60% ELC and 40% water by
volume (a 60/40 coolant mixture). The
minimum recommended concentration
is 40%.
MAINTENANCE - Cooling System Maintenance
Y53-6076-1D1 (09/20) 225
5
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