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M0109073
NOTICE
Never operate an engine without water temperature
regulators in the cooling system. Water temperature
regulators help to maintain the engine coolant at the
correct operating temperature. Cooling system prob-
lems can
develop
without
regulators.
Check the glycol concentration to ensure adequate
protection against boiling or freezing. Perkins
recommends the use of a refractometer for checking
the glycol concentration. A hydrometer should not be
used.
Perkins engine cooling systems should be tested at
500-hour intervals for the concentration of SCA.
Additions of SCA are based on the results of the test.
An SCA that is liquid may be needed at 500-hour
intervals.
NOTICE
Do not mix types and brands of coolant.
Do not mix brands and types of SCAs.
Do not mix SCAs and Extenders.
Only use SCAs or Extender approved by coolant
manufacturer and compatible with coolant.
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Coolants conforming to ASTM D4985 and not
conforming D6210 require the addition of SCA at
initial fill.
Use the equation that is in Table 9 to determine the
amount of SCA that is required when the cooling
system is initially filled.
Table 9
Equation For Adding The SCA To The Heavy-Duty Coolant At
The Initial Fill
V × 0.07 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 10 is an example for using the equation that is
in Table 9 .
Table 10
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant At The Initial Fill
Total Volume of the
Multiplication
Cooling System (V)
Factor
15 L (4 US gal)
× 0.07
water temperature
Amount of SCA
that is Required
(X)
1.05 L (35.5 oz)
Adding The SCA to The Heavy-Duty
Coolant For Maintenance
Heavy-duty antifreeze of all types REQUIRE periodic
additions of an SCA.
Test the antifreeze periodically for the concentration
of SCA. For the interval, refer to the Operation and
Maintenance Manual, "Maintenance Interval
Schedule" (Maintenance Section). Cooling System
Supplemental Coolant Additive (SCA) Test/Add.
Additions of SCA are based on the results of the test.
The size of the cooling system determines the
amount of SCA that is needed.
Use the equation that is in Table 11 to determine the
amount of SCA that is required, if necessary:
Table 11
Equation For Adding The SCA To The Heavy-Duty Coolant
For Maintenance
V × 0.023 = X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 12 is an example for using the equation that is
in Table 11 .
Table 12
Example Of The Equation For Adding The SCA To The Heavy-
Duty Coolant For Maintenance
Total Volume of the
Multiplication
Cooling System (V)
Factor
15 L (4 US gal)
× 0.023
Cleaning the System of Heavy-Duty
Antifreeze
Note: Before corrosion inhibitors can be effective the
cooling system must be free from rust, scale and
deposits.
• Drain the cooling system.
• Before filling the cooling system with acceptable
quality water, pre-dissolve the cleaning agent in
the water. Use a non-foaming detergent to clean
oil contamination, consult your Perkins dealer for
suitable product.
57
Maintenance Section
Fluid Recommendations
Amount of SCA
that is Required
(X)
0.35 L (11.7 oz)
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