66 SEBU8603-01
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 cooling 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.
A hydrometer should not be used.
Perkins
engine cooling systems should be tested at
500 hour intervals for the concentration of 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.
Adding the SCA to Heavy-Duty Coolant
at the Initial F ill
Use the equation that is in Table 12 to determine the
amount of SCA that is required when the cooling
syste
misinitiallyfilled.
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.
Table13isanexampleforusingtheequationthat
is in Table 12.
Table 13
Example Of The Equation For Adding The SCA To
The Heavy-Duty Coolant At The Initial Fill
T
otal Volume
of the Cooling
System (V)
M
ultiplication
Factor
Amount of
SCA that is
Required (X)
15 L (4 US gal)
×0.045
0.7 L (24 oz)
Adding The SCA t
o The Heavy-Duty
Coolant For Maintenance
Heavy-duty an
tifreeze of all types REQUIRE periodic
additions of an SCA.
Test the anti
freeze 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 o
f 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 SCA that is required, if necessary:
Table 14
Equation For Adding The SCA To The Heavy-Duty
Coolant For Maintenance
V×0.014=X
V is the total volume of the cooling s ystem.
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 Hea
vy-Duty Coolant For Maintenance
Total Volume
of the Cooling
Syste
m(V)
Multiplication
Factor
Amount of
SCA that is
Required (X)
15 L (4 US gal) × 0.014 0.2 L (7 oz)
Cleaning the System of Heavy-Duty
Antifreeze
•
Clean the cooling system after used coolant is
drained or before the cooling system is filled with
new coolant.
•
Clean the cooling system whenever the coolant is
contaminated or whenever the coolant is foaming.
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