Additional Information About Diesel - Worldwide Construction And Forestry Division 380GLC Operator's Manual

Additional Information About Diesel Engine Coolants and John Deere COOL-GARD™
II Coolant Extender
Engine coolants are a combination of three chemical
components: ethylene glycol (EG) or propylene glycol
(PG) antifreeze, inhibiting coolant additives, and quality
water.
Coolant Specifications
John Deere COOL-GARD™ II Premix either EG or
PG, are fully formulated coolants that contain all three
components in their correct concentrations. DO NOT
add an initial charge of John Deere COOL-GARD II
Coolant Extender to COOL-GARD II Premix. DO NOT
add any other supplemental coolant additive or water to
COOL-GARD II Premix.
John Deere COOL-GARD II Concentrate contains both
ethylene glycol and inhibiting coolant additives. Mix this
product with quality water, but DO NOT add an initial
charge of John Deere COOL-GARD II Coolant Extender
or any other supplemental coolant additive.
Replenish Coolant Additives
Some coolant additives will gradually deplete during
engine operation. Periodic replenishment of inhibitors
is required, even when John Deere COOL-GARD II
Premix or COOL-GARD II Concentrate is used. Follow
the recommendations in this manual for the use of John
Deere COOL-GARD II Coolant Extender.
Why use John Deere COOL-GARD II Coolant
Extender?
Operating without proper coolant additives will result in
increased corrosion, cylinder liner erosion and pitting, 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.
John Deere COOL-GARD II Coolant Extender is a
chemically matched additive system designed to fortify the
proprietary additives used in John Deere COOL-GARD II
Premix and COOL-GARD II Concentrate and to provide
optimum protection for up to six years or 6000 hours of
operation.
COOL-GARD is a trademark of Deere & Company
Maintenance—Machine
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. Do
not treat an automotive engine coolant with supplemental
coolant additives because the high concentration of
additives can result in additive fallout.
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
Sulfates
Total dissolved solids
Total hardness
pH
Freeze Protection
The relative concentrations of glycol and water in the
engine coolant determine its freeze protection limit.
Ethylene Glycol
Propylene Glycol
DO NOT use a coolant-water mixture greater than 60%
ethylene glycol or 60% propylene glycol.
3-1-16
<40 mg/L
<100 mg/L
<340 mg/L
<170 mg/L
5.5 to 9.0
Freeze Protection Limit
40%
50%
60%
Freeze Protection Limit
40%
50%
60%
-24°C (-12°F)
-37°C (-34°F)
-52°C (-62°F)
-21°C (-6°F)
-33°C (-27°F)
-49°C (-56°F)
DX,COOL17 -19-20APR11-1/1
092221
PN=140