38 SEBU8191-01
Maintenance Section
Refill Capacities
Changing to Per
kins ELC
To change from heavy-duty coolant to the Perkins
ELC, perform t
he following steps:
NOTICE
Care must be taken to ensure that all fluids are
contained d
uring performance of inspection, main-
tenance, testing, adjusting and the repair of the
product. Be prepared to collect the fluidwithsuitable
containers
before opening any compartment or dis-
assembling any component containing fluids.
Dispose of
all fluids according to local regulations and
mandates.
1. Drain the coolant into a suitable container.
2. Dispose of the coolant according to local
regulations.
3. Flush the system with clean water in order to
remove any debris.
4. Use an appropriate cleaner to clean the system.
Follow the instruction on the label.
5. Drain the cleaner into a suitable container. Flush
the cooling system with clean water.
6. Fill the cooling system with clean water and
operate the engine until the engine is warmed to
49° to 6
6°C (120° to 150°F).
NOTICE
Incorrect or incomplete flushing of the cooling system
can r
esult in damage to copper and other metal com-
ponents.
To a v
oid damage to the cooling system, make sure to
completely flushthecoolingsystemwithclearwater.
Continue to flush the system until all the signs of the
cle
aning agent are gone.
7. Drain the cooling system into a suitable container
and
flush the cooling system with clean water.
Note: The cooling system cleaner must be thoroughly
flu
shed from the cooling system. Cooling system
cleaner that is left in the system will contaminate the
coolant. The cleaner may also corrode the cooling
sy
stem.
8. Repeat Steps 6 and 7 until the system is
c
ompletely clean.
9. Fill the cooling system with the Perkins Premixed
E
LC.
ELC C ooling Sys
tem 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 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 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 C oolant and
SCA
NOTICE
Comm
ercial 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).
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