Anti-Freeze / Coolant Specifications / Details - Focs Series - Lombardini LDW 502 Workshop Manual

ANTI-FREEZE / COOLANT SPECIFICATIONS/ DETAILS- FOCS SERIES
Ethylene Glycol based Anti-freeze / coolant usage is required for all Lombardini LDW-FOCS series engines. Never operate a
LDW-FOCS engine with the cooling system filled with water only. The purpose of the anti-freeze/coolant is three-fold. First the
anti-freeze/coolant mixture prevents or reduces the potential for corrosion within the cooling system. Secondly, the anti-freeze/
coolant increases the boiling point of the cooling fluid, reducing the potential for localized boiling within the engine and engine
overheat in general. Lastly, the anti-freeze/coolant reduces the freezing point of the engine coolant, thereby reducing or
preventing potential engine damage caused by freezing.
Many different brands and types of anti-freeze are available in the market. Some anti-freeze/coolants are designed exclusively
for automotive type cooling systems with aluminum cooling system components. Other anti-freeze/coolants are designed
exclusively for use within heavy-duty, predominately cast iron cooling systems and require that the coolant solution be
"charged" with a Supplemental Coolant Additive (SCA). Other anti-freeze solutions are designed for long life and are
sometimes designated "permanent".
Lombardini recommends only those anti-freeze/coolants which are ethylene glycol based and designed to protect aluminum
coolant components- thus, automotive anti-freeze/coolant. Long life anti-freeze/coolants may be used so long as the anti-
freeze/coolant is changed at least every two(2) years as is required by the Lombardini maintenance schedule. Lombardini
does not recommend the use of low silicate heavy duty anti-freeze/coolants which may or may not require the use of SCA's.
The following provides guidelines for the selection of acceptable anti-freeze/coolants for LDW-FOCS series diesel engines.
ANTI-FREEZE/COOLANT CONCENTRATION
Lombardini recommends that the minimum anti-freeze/coolant concentration be 30% when mixed with distilled water.
Concentrations below 30% will not provide adequate corrosion protection. Lombardini further recommends that the maximum
allowable anti-freeze/coolant concentration be 60% when mixed with distilled water. Concentrations of anti-freeze/coolant in
excess of 60% provide no appreciable additional freeze protection and can actually reduce the heat rejection capability of the
cooling system. As such, Lombardini recommends that an anti-freeze / coolant mixture of 50% anti-freeze/coolant and 50%
distilled water be used for most general applications. In general terms the freezing points of anti-freeze/coolant solutions
(ethylene glycol based) with respect to concentration is 30%/ -15°C(5°F); 40%/ -24°C(-12°F); 50%/ -37°C(-34°F); 60%/ -
52°C(-62°F). Please refer to the details regarding freezing points as supplied from your anti-freeze/coolant supplier for more
exact information.
WATER SPECIFICATIONS
Lombardini recommends that the engine cooling fluid solution be made up of the ethylene glycol based anti-freeze/coolant
and distilled water. Further, we realize that the use of distilled water is not always practical. The quality of the base water does
play a large role in the overall chemical composition of the coolant solution and the corrosion prevention characteristics of the
solution. As such, tap water may be used as long as the water meets the following specifications with reference to SAE j1941:
PROPERTY
Total Solids (max.)
Total Hardness (max. CaCO
Chloride (max.)
Sulfate (max. SO )
4
pH
ANTI-FREEZE COOLANT MINIMUM RECOMMENDATIONS/ SPECIFICATIONS
Lombardini recommends that only automotive type anti-freeze/coolants be used in LDW-FOCS series diesel engines. These
anti-freeze/coolants are typically "High Silicate" , although not always, and are designed to prevent corrosion in cooling
systems with aluminum components. The chosen coolant should meet or exceed ASTM 3306 and SAE j1034. Further, the
chosen anti-freeze/coolant should pass ASTM D4340, ASTM D1384 and ASTM D2570 corrosion tests as detailed within SAE
j1034.
NOTE: Many brands/ products meet the specifications presented above and may be used within Lombardini LDW-FOCS
series diesel engines. The engine owner is responsible for determining the suitability of any given anti-freeze/coolant to the
minimum specifications provided. Failure to follow the above coolant guidelines may impact the engine warranty.
COMPILER TECO/ATL
REG. CODE
1-5302-351
SPECIFICATION
340ppm
) 170ppm
3
40ppm
100ppm
5.5-9.0
MODEL N° DATE OF ISSUE
50563 04.90
TEST METHOD
ASTM D1888
ASTM D1126
ASTM D512
ASTM D516
ASTM 1293
DATE ENDORSED
04
REVISION
15.11.99
GENERAL
I
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