SEBU8325-01 41
Maintenance Section
Refill Capacities
Commercial Hea
vy-Duty Antifreeze and
SCA
NOTICE
Commercial Heavy-Duty Coolant which contains
Amine as part of the corrosion protection system must
not be used.
NOTICE
Never opera
te an engine without water temperature
regulators in the coolin g system. Water temperature
regulators help to maintain the engine coolant at the
correct op
erating temperature. Cooling system prob-
lems can develop without water temperature regula-
tors.
Check the
antifreeze (glycol concentration) in
order to ensure adequate protection against boiling
or freezing. Perkins recommends the use of a
refract
ometer for checking the glycol concentration.
Perkins engine cooling systems should be tested
at 500 ho
ur intervals for the concentration of
Supplemental Coolant Additive (SCA).
Additi
ons of SCA are based on the results of the test.
An SCA that is liquid may be needed at 500 hour
intervals.
Refer to Table 11 for part numbers and for quantities
of SCA.
Table
11
Perkins Liquid SCA
Part Number Quantity
21825735 10
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Commercial heavy-duty antifreeze that meets “ASTM
D4985” specifications MAY require an addition of
SCA at the initial fill. Read the label or the instructions
that are provided by the OEM of the product.
Use the equation that is in Table 12 to determine the
amount of Perkins SCA that is required when the
cooling system is initially filled.
Table 12
Equation For Adding The SCA To The Heavy-Duty
Coolant At The Initial Fill
V × 0.045 = X
V
is the total volume of the cooling system.
X is the amount of SCA that is required.
Table13isanex
ample for using the equation that
is in Table 12.
Table 13
Example Of The Equation For Adding The SCA To
The H eavy-Duty Coolant At The Initial Fill
Total Volume
of the Cooling
System (V)
Multiplication
Factor
Amount of SCA
that is Required
(X)
15 L (4 US gal)
×0.045
0.7L(24oz)
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). Test the
concentration of SCA.
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 14 to determine the
amount of Perkins SCA that is required, if necessary:
Table 14
Equati
on For Adding The SCA To The Heavy-Duty
Coolant For Maintenance
V×0.014=X
V is the total volume of the cooling system.
X is the amount of SCA that is required.
Table 15 is an example for using the equation that
is in Table 14.
Table 15
Example Of The Equation For Adding The SCA To
The Heavy-Duty Coolant For Maintenance
Total Volume
of the Cooling
System (V)
Multiplication
Factor
Amount of SCA
that is Required
(X
)
15 L (4 US gal)
×0.014
0.2 L (7 oz)
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