CUMMINS N14 - Coolant Additive Requirement; Supplemental Coolant Additives (SCA’s)

Using floating ball hydrometers can give incorrect
readings.
Supplemental Coolant Additives
(SCA’s)
Correct use of SCA’s in conjunction with water and an-
tifreeze are needed to protect engines from cooling sys-
tem problems. The system must be precharged with the
correct concentration of SCA.
Cummins/FleetguardT uses the SCA unit to define the
requiredconcentration level to protectagainst liner pitting.
When coolant is replaced in the field, it must be replaced
with Heavy Duty Coolant precharged with SCA’s. In
addition, a service coolant filter must be installed. To-
gether, this will result in a total precharge of approxi-
mately 1.5 SCA units per gallon of coolant.
Coolant Blending/Mixing
Proper blending of Heavy Duty Coolant requires:
• Pour water into the container
• Add low-silicate antifreeze
• Add DCA4 liquid
• Thoroughly blend the components
Following the correct order for mixing the Heavy Duty
Coolant will prevent additive dropout during the mixing
process.
Section 1 - Cooling System Supplemental Coolant Additives (SCA’s)
N14 Page 1-7