OPM 200 en-GB 47
©
Scania CV AB 2014, Sweden
Cooling system
Checking antifreeze and cor-
rosion inhibitor
Use only pure fresh water that is free from parti-
cles, sludge and other impurities.
1.
Pour a small amount of coolant into a con-
tainer and check that the coolant is pure and
clear.
2.
Change the coolant if it is contaminated or
cloudy.
3.
Measure the content of antifreeze and corro-
sion inhibitor with one of the following in-
struments:
The following rules apply to ethylene glycol-
based coolant:
• The antifreeze and corrosion inhibitor content
must be minimum 35 percent by volume for
corrosion protection to be sufficient.
• An antifreeze and corrosion inhibitor content
greater than 55 percent by volume impairs the
ability to protect against frost.
• If ice forms in the coolant, there are disrup-
tions initially, but there is no immediate risk
of damage. The engine should not be subject-
ed to heavy loads when ice starts to form.
Part No. Designation
588 805 Refractometer
588 226 Refractometer
Property of American Airlines
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