TM 5-3805-281-24-2
Fuels, Lubricants, and Coolant
ENGINE COOLANT SPECIFICATIONS
Water Quality Specifications
Engine coolants are a combination of three chemical
Parts Per
Grains Per
components: ethylene glycol (antifreeze), inhibiting
Item
Million
U.S. Gallon
coolant additives, and quality water.
Chlorides (maximum)
40
2.5
Sulfates (maximum)
100
5.9
Coolant solutions of quality water, ethylene glycol
Total Dissolved Solids (maximum)
340
20
Total Hardness (maximum)
170
10
concentrate (antifreeze), and supplemental coolant
pH Level
5.5--9.0
additives (SCAs) MUST be used year-round to protect
against freezing, boil-over, liner erosion or pitting, and
ETHYLENE GLYCOL CONCENTRATE
to provide a stable, noncorrosive environment for
(ANTIFREEZE)
seals, hoses, and metal engine parts.
IMPORTANT: Do not use cooling system sealing
Some products, including John Deere PREDILUTED
additives or antifreeze that contains
ANTIFREEZE/SUMMER COOLANT and CID
sealing additives.
A-A-52624, are fully formulated coolants that contain
all three components in their correct concentrations.
The use of John Deere coolant products or CID
Do not add an initial charge of supplemental coolant
A-A-52624 as outlined on the previous page, is
additives to these fully formulated products.
strongly recommended.
Some coolant concentrates, including John Deere
If John Deere coolant products are not used, other low
ANTIFREEZE/SUMMER COOLANT CONCENTRATE
silicate ethylene glycol base coolants for heavy-duty
and CID A-A-52624 Type 1, contain both ethylene
diesel engines may be used when mixed with quality
glycol antifreeze and inhibiting coolant additives. Mix
water and supplemental coolant additives (SCAs), if
these products and quality water, but do not add an
they meet one of the following specifications:
initial charge of supplemental coolant additives.
ASTM D5345 (prediluted coolant)
Coolants meeting ASTM D6210 (prediluted coolant) or
ASTM D4985 (coolant concentrate) in a 40% to 60%
ASTM D6211 (coolant concentrate) require an initial
mixture of concentrate with quality water.
charge of supplemental coolant additives.
ASTM D6210
ASTM D6211
WATER QUALITY
Coolants meeting these specifications require addition
Water quality is important to the performance of the
of supplemental coolant additives (SCAs), formulated
cooling system. Distilled, deionized, or demineralized
for heavy-duty diesel engines, for protection against
water is recommended for mixing with ethylene glycol
corrosion and cylinder liner erosion and pitting.
base engine coolant concentrate. All water used in the
cooling system should meet the following minimum
specifications for quality:
Continued on next page
DPSG,OUOE003,7697
1928OCT991/4
