Operator`s manual

Cooling System 45
Antifreeze or premixed coolant meeting
the standards ASTM D 3306 or ASTM D
4656 are primarily for automotive gasoline
engines, containing high levels of silicate,
and are unacceptable for heavy duty diesel
engines.
Water and antifreeze should generally be
filled as a 50/50 mixture. The mixture should
never be less than 40% antifreeze and 60%
clean water or more than 60% antifreeze and
40% clean water. Mix the antifreeze/water
to the required concentration before adding
to the cooling system. The following table
gives approximate freezing protection for
certain mixtures.
Freeze Protection
Down To:
Percentage of
Antifreeze in
Mixture
-13 F (-25 C)
40%
-22 F (-30 C)
46%
-36 F (-38 C)
54%
-51 F (-46 C)
60%
Note: 60% antifreeze in the mixture gives
maximal freeze protection. To increase the
antifreeze content beyond that will only
decrease the freeze protection.
W2003082