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SEBU8311-02 47
Maintenance Section
Re fi ll Capacities
Table 28
Ethylene Glycol
Concentration Freeze Protection
50 Percent − 36 °C ( − 33 °F)
60 Percent − 51 °C ( − 60 °F)
NOTICE
Do not use propylene glycol in concentrations that ex-
ceed 50 percent glycol because of propylene glycol's
reduced heat transfer capability. Use ethylene glycol
in conditions that require additional protection against
boiling or freezing.
Table 29
Propylene Glycol
Concentration Freeze Protection
50 Percent − 29 °C ( − 20 °F)
To check the concentration of glycol in the coolant,
measure the speci fi c gravity of the coolant.
Coolant Recommendations
•
ELC
____________________________
Extended Life Coolant
•
SCA
___________________
Supplement Coolant Additive
•
ASTM
__________________________________________
American
Society for Testing and Materials
The following two coolants are used in Perkins diesel
engines:
Preferred – Perkins ELC
Acceptable – A commercial heavy-duty antifreeze
that meets “ASTM D4985” speci fi cations
NOTICE
Do not use a commercial coolant/antifreeze that on-
ly meets the ASTM D3306 speci fi cation. This type of
coolant/antifreeze is made for light automotive appli-
cations.
Perkins recommends a 1:1 mixture of water and
glycol. This mixture of water and glycol will provide
optimum heavy-duty performance as a antifreeze.
This ratio may be increased to 1:2 water to glycol if
extra freezing protection is required.
Note: A commercial heavy-duty antifreeze that
meets “ASTM D4985” speci fi cations MAY require a
treatment with an SCA at the initial fi ll. Read the label
or the instructions that are provided by the OEM of
the product.
In stationary engine applications and marine engine
applications that do not require anti-boil protection
or freeze protection, a mixture of SCA and water
is acceptable. Perkins recommends a six percent
to eight percent concentration of SCA in those
cooling systems. Distilled water or deionized water
is preferred. Water which has the recommended
properties may be used.
Table 30
Coolant Service Life
Coolant Type Service Life
Perkins ELC
6,000 Service Hours or
Three Years
Commercial Heavy-Duty
Antifreeze that meets
“ASTM D4985”
3000 Service Hours or
Two Years
Perkins POWERPART
SCA
3000 Service Hours or
Two Years
Commercial SCA and
Water
3000 Service Hours or
Two Years
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 1:1 premixed cooling solution
with distilled water. The Premixed ELC provides
freeze protection to − 36 °C ( − 33 °F). The Premixed
ELC is recommended for the initial fi ll 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.