NOTE
Coolant is harmful to the environment.
Unused coolant must be stored as a
toxic hazardous material in leakproof
containers. Used coolant must be
processed as industrial chemical
waste. Please follow HAZMAT guide-
lines with both used and unused cool-
ants.
Concentration
Check the level of freeze/boilover
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
/ Water
Ratio
Freeze
Point °F
(°C)
Recommended
Levels
40%
-12 (-24)
45%
-23 (-31)
50%
-34 (-37)
55%
-50 (-46)
60%
-62 (-54)
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.
High-quality water is important for cooling
system performance. Excessive levels of
calcium and magnesium contribute to
scaling problems, and excessive levels of
chlorides and sulfates cause cooling
system corrosion. Water used to prepare
coolant from concentrate must meet the
requirements listed in the table below.
Water Quality
Calcium
Magnesium
(hardness)
Maximum 170 ppm
as (CaCO3 +
MgCO3)
pH
5.5 to 9.9 (min/
max)
Chloride
40 ppm as (CI)
ENGINE MAINTENANCE - Cooling System Maintenance
Y53-1185-1J1 (10/21)
49
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Страница 3: ...PX Operator Manual PACCAR PX 9 Engine...
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Страница 5: ...Engine Operation 1 Engine Maintenance 2 Engine Warranty 3 Contents...
Страница 78: ...ENGINE MAINTENANCE Engine Identification Y53 1185 1J1 10 21 75 2...
Страница 79: ...Chapter 3 ENGINE WARRANTY United States and Canada Engine Warranty 77 ENGINE WARRANTY 76 Y53 1185 1J1 10 21 3...
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Страница 96: ...Index...