NOTICE
Do not use propylene glycol in concentrations that ex-
ceed 50 percent glycol because of the reduced heat
transfer capability of propylene glycol. Use ethylene
glycol in conditions that require additional protection
against boiling or freezing.
Table 18
Propylene Glycol
Concentration
Freeze Protection
50 Percent
−29 °C (−20 °F)
To check the concentration of glycol in the coolant,
measure the specific 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 D6210 specifications
NOTICE
The 400F industrial engines must be operated
with a 1:1 mixture of water and glycol.
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 1:1 mixture of water and
glycol. This mixture of water and glycol will provide
optimum heavy-duty performance as an antifreeze.
This ratio may be increased to 1:2 water to 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. Water which has the
recommended properties may be used
Table 19
Coolant Service Life
Coolant Type
Service Life
(1)
Perkins ELC
6,000 Service Hours or Three
Years
Commercial Heavy-Duty Anti-
freeze that meets ASTM
D6210
3000 Service Hours or Two Years
A Perkins approved SCA
inhibitor
3000 Service Hours or Two Years
(1)
Use the interval that occurs first. The cooling 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
system components life unless appropriate corrective
action is performed.
40
SEBU9064
Refill Capacities
Fluid Recommendations