Perkins 1206E-E70TTA Operation And Maintenance Manual page 83

SEBU8601-04
Note: Some commercially available coolants are
based on alternative fluids, such as 1, 3-propanediol
(beta-propylene glycol, PDO), glycerin (glycerol) or
mixtures of these alternatives with ethylene/
propylene glycols. At the time of publication of this
document no industry standard exists for coolants
based on these chemicals. Until such standard/
specifications are published and evaluated by
Perkins, use of PDO, glycerine or other alternative
coolants is not recommended in Perkins diesel
engines.
Coolant Recommendations
• ELC
• SCA Supplement Coolant Additive
• ASTM American Society for Testing and
Materials
ELC - extended life coolant. A coolant that relies on
organic inhibitors for corrosion and cavitation
protection. Also called OAT coolant (Organic Acid
Technology).
SCA - supplemental coolant additive, concentrated
inorganic inhibitor package.
Extender - concentrated organic inhibitor package.
Conventional Coolant - a coolant that relies on
inorganic inhibitors for corrosion and cavitation
protection.
Hybrid Coolant - a coolant in which the corrosion and
cavitation protection is based on a mixture of organic
and inorganic inhibitors.
The following coolants are recommended for used in
Perkins diesel engines:
Preferred – Perkins ELC
Acceptable – A commercial heavy-duty antifreeze
that meets "ASTM D6210" or "ASTM D4985"
specifications.
NOTICE
The Perkins industrial engines with a NOx reduc-
tion system must be operated with a minimum
30% volume glycol-water mixture, Perkins recom-
mends 50% volume glycol-water mixture of water
and glycol. The 50% concentration allows the
NOx reduction system to operate correctly at
high ambient temperatures.
Extended Life Coolant
NOTICE
Do not use a commercial coolant/antifreeze that only
meets the ASTM D3306 specification. This type of
coolant/antifreeze is made for light automotive
applications.
Perkins recommends a 50% mixture of water and
glycol. This mixture of water and glycol will provide
optimum heavy-duty performance as an antifreeze.
This ratio may be changed to 40% water to 60%
glycol if extra freezing protection is required.
A mixture of SCA 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 percent concentration
of SCA in those cooling systems. Distilled water or
deionized water is preferred.
Table 14
Coolant Service Life
Coolant Type
Perkins ELC
Commercial Heavy-Duty Anti-
freeze that meets "ASTM
D6210"
Commercial SCA inhibitor and
Water
(1) Use the interval that occurs first. The cooling system must also
be flushed out at this time.
Perkins 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 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.
83
Maintenance Section
Fluid Recommendations
Service Life (1)
6,000 Service Hours or Three
Years
3000 Service Hours or Two Year
3000 Service Hours or One Year