FILTERS BALDWIN

Catalog Baldwinfilters for tractors

Auto Parts / All antifreezes used in today’s regularly replenish the SCAs. This
heavy-duty engines should meet the maintenance dosage is about 25% of
SAE J1941 or A.S.T.M.D-4985 the pre-charge concentration.
specification for silicate content. The Baldwin recommends coinciding this
antifreeze concentration should be cooling system check with the normal
held between 40% and 60% (40% vehicle maintenance schedule.
antifreeze and 60% water to 60% Replenish the SCAs by adding liquid
antifreeze and 40% water). or by changing the coolant filter which
meets both normal and extended
SUPPLEMENTAL change intervals.
COOLANT ADDITIVES As both the pre-charge and
maintenance dosages are given as
Using the proper amount of a high units of SCAs per gallon of cooling
quality Supplemental Coolant system capacity, it is extremely
Additive is critical in preventing important that the total capacity of
problems. When filling a newly the cooling system be accurately
cleaned system with fresh antifreeze noted. In addition to the radiator and
and water, a Supplemental Coolant the engine block, remember to
Additive is required. These additives account for the coolant in the cab
contain many inhibitors not found in heater, oil coolers, after coolers, fuel
today’s antifreezes or, if present in heaters and so forth.
the antifreeze, they are at very low Underestimating the volume of
concentration levels (unacceptable coolant dilutes the SCA package
for engine protection). which then provides little, if any,
protection. Though generally less
PRE-CHARGE VS. dangerous, overestimating coolant
MAINTENANCE DOSES capacity can lead to an over-
concentration of SCAs. The
formation of gels in radiators and
The effectiveness of Supplemental
Coolant Additives is highly deteriorating water pump seals can
dependent on an oxide coating on all both be caused by over-
concentration.
wet surfaces. It is extremely
important that an adequate Baldwin Filters recommends the
concentration of SCAs be available cooling system be tested at least
at all times in order to form and twice annually, preferably at every
maintain this film. service interval to monitor the level
Both new and recently rebuilt of SCAs in the cooling system.
engines must be first conditioned
with a high dosage of SCAs to insure BALDWIN BTE
proper film formation. Referred to as
pre-charge rate, this high dosage is Baldwin’s Balanced Treatment for
usually four or five times more
Ethylene Glycol (BTE) is a
concentrated than the maintenance
borate/nitrite-based inhibitor system.
dosage. Proper pre-charge of the This formulation has proven to be
system is extremely critical.
successful in preventing cooling
The continued inward collapse of air system corrosion for more than
bubbles wears away the protective twenty years. When used at
film, therefore it is important to recommended pre-charge and

1288 / Auto Parts

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