Perkins 4016-61 TRG Operation And Maintenance Manual page 34

34
Maintenance Section
Refill Capacities
•
Drain a portion of the cooling system into a suitable
container according to local regulations. Then, fill
the cooling system with premixed ELC. This should
lower the contamination to less than 10 percent.
•
Maintain the system as a conventional Heavy-Duty
Coolant. Treat the system with an SCA. Change
the coolant at the interval that is recommended for
the conventional Heavy-Duty Coolant.
Commercial Heavy-Duty Coolant and
SCA
NOTICE
Commercial Heavy-Duty Coolant which contains
Amine as part of the corrision protection system must
not be used.
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 water temperature regula-
tors.
Check the coolant (glycol concentration) in order
to ensure adequate protection against boiling
or freezing. Perkins recommends the use of a
refractometer for checking the glycol concentration.
Perkins engine cooling systems should be tested
at 500 hour intervals for the concentration of
Supplemental Coolant Additive (SCA).
Additions 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 12 for part numbers and for quantities
of SCA.
Table 12
Perkins Liquid SCA
Part Number
21825735
Adding the SCA to Heavy-Duty Coolant
at the Initial Fill
Commercial heavy-duty coolant 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.
Quantity
10
Use the equation that is in Table 13 to determine the
amount of Perkins SCA that is required when the
cooling system is initially filled.
Table 13
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.
Table 14 is an example for using the equation that
is in Table 13.
Table 14
Example Of The Equation For Adding The SCA To
The Heavy-Duty Coolant At The Initial Fill
Total Volume Multiplication
of the Cooling Factor
System (V)
15 L (4 US gal) × 0.045
Adding The SCA to The Heavy-Duty
Coolant For Maintenance
Heavy-duty coolant of all types REQUIRE periodic
additions of an SCA.
Test the coolant 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 15 to determine the
amount of Perkins SCA that is required, if necessary:
Table 15
Equation 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 16 is an example for using the equation that
is in Table 15.
SEBU8604
Amount of SCA
that is Required
(X)
0.7 L (24 oz)