66 SEBU8605-01
Maintenance Section
Refill Capacities
AmixtureofSCA
inhibitor and water is acceptable but
will not give the same level of corrosion, boiling and,
freezing protection as ELC. Perkins recommends a 6
percent to 8 pe
rcent concentration of SCA in those
cooling systems. Distilled water or deionized water
is preferred. Water which has the recommended
properties m
ay be used.
Table 11
Coolant Service Life
Coolant Type Service Life
(1)
Perkins ELC
6,000 Service Hours or
Three Years
Commercia
lHeavy-Duty
Antifreeze that meets
“ASTM D6210”
3000 Service Hours or
Two Y ear
Commercial SCA inhibitor
and Water
3000 Service Hours or
One Year
(1)
Use the interval that occurs first. The coo ling system must
also be flushed out at this time.
ELC
Perkins provides ELC for use in the following
applications:
•
Heavy-duty spark ignited gas engines
•
Heavy-duty diesel engines
•
Automotive applications
The anti-corrosion package for ELC is different from
the anti-corrosion package for other coolants. ELC
is an ethylene glycol base coolant. However, ELC
contains organic corrosion inhibitors and antifoam
agents with low amounts of nitrite. Perkins ELC
has been formulated with the correct amount of
these additives in order to provide superior corrosion
protection for all metals in engine cooling systems.
ELC is available in a premixed cooling solution with
distilled water. ELC is a 1:1 mixture. The Premixed
ELC provides freeze protection to −36 °C (−33 °F).
The Premixed ELC is recommended for the initial
fill of the cooling system. The Premixed ELC is also
recommended for topping off the cooling system.
Containers of several sizes are available. Consult
your Perkins distributor for the part numbers.
ELC Cooling System Maintenance
Correct additions to the Extended Life
Coolant
NOTICE
Use only Perkins products for pre-mixed or concen-
trated coolants.
Mixing Extended Life Coolant with other products re-
duces the Extended Life Coolant service life. Failure to
follow the
recommendations can reduce cooling sys-
tem components life unless appropriate corrective ac-
tion is performed.
In order to maintain the correct balance between
the antifreeze and the additives, you must maintain
the recommended concentration of ELC. Lowering
the proportion of antifreeze lowers the proportion of
additive. This will lower the ability of the coolant to
protect the system from pitting, from cavitation, from
erosion, and from deposits.
NOTICE
Do not use a conventional coolant to top-off a cooling
system
that is filled with Extended Life Coolant (ELC).
Do not use standard supplemental coolant additive
(SCA)
.
When using Perkins ELC, do not use standard SCA's
or SCA
filters.
ELC Cooling System Cleaning
Note
: If the cooling system is already using ELC,
cleaning agents are not required to be used at
the specifi ed coolant change interval. Cleaning
age
nts are only required if the system has been
contaminated by the addition of some other type of
coolant or by cooling system damage.
Clean water is the only cleaning agent that is required
when ELC is drained from the cooling system.
Before the cooling system is filled, the heater control
(if equipped) must be set to the hot position. Refer
to
the OEM in order to set the heater control. After
the cooling system is drained and the cooling system
is refilled, operate the engine until the coolant level
r
eaches the normal operating temperature and
until the coolant level stabilizes. As needed, add
the coolant mixture in order to fi ll the system to the
s
pecified level.
Changing to Perkins ELC
To change from heavy-duty antifreeze to the Perkins
ELC, perform the following steps:
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