operators_manual

Concentration
Check the level of freeze/boil over
protection, which is determined by the
glycol concentration. Use a glycol
refractometer to determine glycol level.
Add coolant to obtain the coolant/water
ratio required to provide the protection you
need. A 50/50 mix of coolant and water is
adequate for most applications. For
extremely cold operating conditions, the
ratio can be adjusted to a higher
concentration of coolant.
NOTE
Maximum recommended ELC concen-
tration
is 60% ELC and 40% water by
volume (a 60/40 coolant mixture). The
minimum recommended concentration
is 40%.
Glycol Concentration Level
Level
Desired
Coolant
/ W
ater
Ratio
Freeze
Point °F
(°C)
Recommended
Levels
40% -12 (-24)
45% -23 (-31)
50% -34 (-37)
55% -50 (-46)
60% -62 (-52)
Condition
Perform a visual inspection of the coolant.
It should have no cloudiness or floating
debris. Determine the chemical inhibitor
concentration level by using an extended
life coolant specific test kit or test strips.
Inhibitor concentration level determines
corrosion protection. If you are concerned
about possible coolant quality
,
contamination, or mechanical problems,
submit a coolant sample for analysis.
Improper maintenance may cause coolant
degradation and could result in damage to
the cooling system and engine
components. Consult your dealer or
the coolant manufacturer
’s representative
for recommended extended life coolant test
kits, test strips, and laboratory sample
procedures.
Coolant Extender
Add extended life coolant extender, if
necessary, according to the corrosion
inhibitor concentration required. DO NOT
add coolant extender to nitrite-free coolant.
Checking Coolant Level
Check the coolant level daily. See Inspect
Coolant Level on page 201.
MAINTENANCE - Cooling System Maintenance
Y53-6096-1C1 (09/20) 199
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