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Maintenance Section
Cooling System Specifications
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 fill of the cooling
system. The Premixed ELC is also recommended
for topping off the cooling system.
ELC Concentrate is also available. ELC Concentrate
can be used to lower the freezing point to −51
C
(−60
F) for arctic conditions.
Containers of several sizes are available. Consult
your Caterpillar dealer for the part numbers.
Note: Caterpillar developed the EC-1 specification.
The EC-1 specification is an industry standard. The
EC-1 specification defines all of the performance
requirements that are needed for an engine coolant
to be sold as an extended life coolant for Caterpillar
engines. ELC can be used in most OEM engines of
the following types: diesel, gasoline, and natural
gas. ELC meets the performance requirements of
“ASTM D4985” and “ASTM D5345” for heavy-duty
low silicate antifreeze/coolants. ELC also meets the
performance requirements of “ASTM D3306” and
“ASTM D4656” for automotive applications.
i01111712
Extended Life Coolant (ELC)
Cooling System Maintenance
SMCS Code: 1350; 1352; 1395
Proper additions to the Extended
Life Coolant
NOTICE
Use only Caterpillar products or commercial products
that have passed Caterpillar’s EC-1 specification for
pre-mixed or concentrated coolants.
Use only Caterpillar Extender with Extended Life
Coolant.
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 Extended Life
Coolant (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). Only use ELC Extender in cooling systems that
are filled with ELC.
Caterpillar ELC Extender
Caterpillar ELC Extender is added to the cooling
system halfway through the ELC service life. Treat
the cooling system with ELC Extender at 3000 hours
or one half of the coolant service life. Use Table 13
in order to determine the proper amount of ELC
Extender that is required.
Containers of several sizes are available. Consult
your Caterpillar dealer for the part numbers.
Ta bl e 1 3
Caterpillar ELC Extender Additions by
Cooling System Capacity
Cooling System Capacity
Addition of ELC
Extender
22 to 30 L (6 to 8 US gal) 0.57 L (20 fl oz)
31 to 38 L (9 to 10 US gal) 0.71 L (24 fl oz)
39 to 49 L (11 to 13 US gal) 0.95 L (32 fl oz)
50 to 64 L (14 to 17 US gal) 1.18 L (40 fl oz)
65 to 83 L (18 to 22 US gal) 1.60 L (54 fl oz)
84 to 114 L (23 to 30 US gal) 2.15 L (72 fl oz)
115 to 163 L (31 to 43 US gal) 3.00 L (100 fl oz)
164 to 242 L (44 to 64 US gal) 4.40 L (148 fl oz)
For cooling system capacities that exceed the
capacities that are specified in Table 13, use the
equation that is in Table 14 in order to determine
the proper amount of ELC Extender that is required.
Ta bl e 1 4
Equation For Adding ELC Extender To ELC
V × 0.02 = X
V is the total volume of the cooling system.
X is the amount of ELC Extender that is required.
Table 15 is an example for using the equation that
is in Table 14.
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