50 SEBU8121
Maintenance Section
Refill Capacities
3. Flush the syste
mwithcleanwaterinorderto
remove any debris.
4. Use Perkins cl
eaner to clean the system. Follow
the instruction on the label.
5. Drain the clea
ner into a suitable container. Flush
the cooling system with clean water.
6. Fill the cooli
ng system with clean water and
operate the engine until the engine is warmed to
49° to 66°C (120° to 150°F).
NOTICE
Incorrect or incomplete flushing of the cooling system
can result in damage to copper and other metal com-
ponents.
To avoid damage to the cooling system, make sure to
completely f
lush the cooling system with clear water.
Continue to flush the system until all the signs of the
cleaning agent are gone.
7. Drain the cooling system into a suitable container
andflushthecoolingsystemwithcleanwater.
Note: The cooling system cleaner must be thoroughly
flushed from the cooling system. Cooling system
cleaner tha
t is left in the system will contaminate the
coolant. The cleaner may also corrode the cooling
system.
8. Repeat Steps 6 and 7 until the system is
comple tely clean.
9. Fill the cooling system with the Perkins Premixed
ELC.
ELC Cooling System Contamination
NOTICE
Mixing ELC with other products reduces the effective-
ness of the ELC and shortens the ELC service life.
Use only Perkins Products for premixed or concen-
trate coolants. Use only Perkins ELC extender with
Perkins ELC. Failure to follow these recommenda-
tions can result in shortened cooling system compo-
nent life.
ELC cooling systems can withstand contamination to
a maximum of ten percent of conventional heavy-duty
coolant/antifreeze or SCA. If the contamination
exceeds ten percent of the total system capacity,
perform ONE of the following procedures:
•
Drain the cooling system into a suitable container.
Dispose of the coolant according to local
regulations. Flush the system with clean water. Fill
the system with the Perkins ELC.
•
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 cont
amination to less than 10 percent.
•
Maintain the system as a conventional H eavy-Duty
Coolant. Tre
at the system with an SCA. Change
the coolant at the interval that is recommended for
the conventional Heavy-Duty Coolant.
Commercial Heavy-Duty Coolant/
Antifreeze 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 h
elp to maintain the engine coolant at the
correct operating temperature. Cooling system prob-
lems can develop without water temperature regula-
tors.
Check the coolant/antifreeze (glycol concentration)
in order to ensure adequate protection against
boiling or f
reezing. Perkins recommends the use of a
refractometer for checking the glycol concentration.
Perkins eng
ine 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 16 for part numbers and for quantities
of SCA.
Table 16
Perkins Liquid SCA
Part Number
Quantity
21825735
Adding the SCA to Heavy-Duty Coolant
at th e Initial Fill
Commercial heavy-duty coolant/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.
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