Amadas 9980 - Additional Coolant Information

Fuel and Lubricants 9980 Self-Propelled Peanut Combine
Additional Coolant
Information
Engine coolants are a combination of three
chemical components: ethylene glycol or
propylene glycol antifreeze, inhibiting coolant
additives, and quality.
Coolant Specifications
Some products, including John Deere Cool-
Gard Prediluted Coolant, are fully formulated
coolants that contain all three components in
their correct concentra
tions. Do not add an
initial charge of supplemental coolant additives
to these fully formulated products.
Coolants meeting ASTM D6210 do not require
an initial charge of supplemental coolant
additives.
Some coolant concentrates, including John
Deere Cool-
Gard Coolant Concentrate,
contain both glycol antifreeze and inhibiting
coolant additives. Mix these products with
quality water, but do not add an initial charge
of supplemental coolant additives.
Coolants meeting ASTM D4985 require an
initial char
ge of supplemental coolant
additives.
Replenish Coolant Additives
The concentration of coolant additives is
gradually depleted during engine operation.
Periodic replenishment of inhibitors is
required, even when John Deere COOL-
GARD or another fully form
ulated coolant is
used. Follow the recommendations in this
manual for the use of supplemental coolant
additives.
Importance of Coolant Additives
Operating without proper coolant additives will
res
ult in increased corrosion, cylinder liner
erosion and pit
ting and other damage to the
engine and cooling system. A simple mixture
of ethylene glycol or propylene glycol and
water will not give adequate protection.
Use of supplemental coolant additives reduces
corrosion, erosion, and pitting. These
chemicals
reduce the number of vapor
bubbles in the coolant and help form a
protective film on cylinder liner surfaces.
Avoid Automotive-Type Coolants
Never use automotive-
type coolants (such as
those meeting ASTM D3306). These coolants
do not contain the correct additives to protect
heavy-duty diesel engines. They often contain
a high concentration
of silicates and may
damage the engine or cooling system.
Water Quality
Water quality
is important to the performance
of the cooling system. Distilled, deionized, or
demineralized water is recommended for
mixing with ethylene glycol and propylene
glycol base engine coolant concentrate. All
water used in the cooling system should meet
the following minimum specifications for
quality:
Chlorides
<40 mg/L
Sulfates
<100 mg/L
Total dissolved solids
<340 mg/L
Total hardness
<170 mg/L
pH
5.5 to 9.0
Freeze Protection
The relative concentrations of glycol and water
in the engine coolant determine its freeze
protection limit.
Ethylene Glycol
Freeze Protection Limit
40%
-24°C (-12°F)
50%
-37°C (-34°F)
60%
-52°C (-62°F)
Propylene Glycol
Freeze Protection Limit
40%
-21°C (-6°F)
50%
-33°C (-27°F)
60%
-49°C (-56°F)
Do NOT use a coolant-
water mixture greater
than 60% ethylene glycol or 60% propylene
glycol.
304 09/08/15 MAN141