
SEBU8219-01 73
Maintenance Section
Refill Capacities
Cooling System
Coolant Recommendations
NOTICE
Do not use a comm
ercial coolant/antifreeze that only
meets the ASTM “D3306” specification. This type of
coolant/antifreeze is made for light duty automotive
applications
.
Use only the coolant/antifreeze that is recommended.
The following coolants are the primary types of
coolants that are used in Caterpillar Engines:
Preferred – Cat ELC (Extended Life Coolant) or
a commercial extended life coolant that meets the
Caterpillar
EC-1 specification
Acceptable – Cat DEAC (Diesel Engine
Antifreeze/
Coolant) or a commercial heavy-duty
coolant/antifreeze that meets “ASTM D4985” or
“ASTM D5345” specifications
Caterpillar recommends a 1:1 mixture of water and
glycol. This mixture will provide optimum heavy-duty
performanc
e as a coolant/antifreeze.
Note: Cat DEAC DOES NOT require a treatment
with an SCA a
t the initial fill. Commercial heavy-duty
coolant/antifreeze that meets “ASTM D4985”
or “ASTM D5345” specifications MAY require a
treatment
with an SCA at the initial fill. 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 protection from
boiling o
r freezing, a mixture of SCA and water is
acceptable. Caterpillar recommends a minimum
of six percent to a maximum of eight percent
SCA conce
ntration in those cooling systems.
Distilled water or deionized water is preferred. W ater
which has the required properties may be used. For
the wate
r properties, refer to Special Publication,
SEBU6251, “Caterpillar Commercial Diesel Engine
Fluids Recommendations” for additional information
that per
tains to coolants.
Note: Table 6 is a list of the coolants that are
recomm
ended and the service life (calendar) of the
coolants. The service life of coolant is also limited by
use (service hours). Refer to the specificengine’s
Operat
ion and Maintenance Manual, “Maintenance
Interval Schedule”. To achieve this service life,
the coolants must be properly maintained. The
mainte
nance program includes S·O·S coolant
analysis.
Table 6
Coolant Service Life
Coolant Type Service Life
(1)
Cat ELC Six Years
Cat DEAC
Three Years
Commercial Heavy-Duty
Coolant/Antifreeze that
meets “ASTM D5345”
Two Years
Commercial Heavy-Duty
Coolant/Antifreeze that
meets “ASTM D4985”
One Year
Caterpillar SCA and
Water
Two Years
Commercial S
CA and
Water
One Year
(1)
The service life of coolant is also limited by use (service hours).
Refer to the specific engine’s Operation and Maintenance
Manual, “Maintenance Interval Schedule” (M aintenance
Section).
Coolant Capacities
To properly
maintain the cooling system, the total
cooling system capacity must be determined. The
total cooling system capacity will vary between
individua
l installations. The total cooling system
capacity can include the following components:
engine, expansion tank, radiator, and piping.
Refer to the specifications that are provided by
Caterpillar or the OEM of the installation. Record the
total coo
ling system capacity in the appropriate Table.
Table 7
C32 Engine
Approximate Refill Capacities
Compartment or System Liters Quarts
Engine Only 55 58
External S
ystem (OEM)
(1)
55 58
Total Cooling System
(2)
110 116
(1)
The External Sy stem includes a r adiator or an e xpansion tank
with the fo llowing com ponents: heat exchanger, aftercooler,
and piping. Refer to the Caterpillar sp ecifications or the OEM
specifications and enter the capacity for the E xternal System
in this row.
(2)
The Total Cooling System includes the capac ity f or the engine
plus the capacity for the external system. Enter the total in this
row.