20
PS 685
DEC 09
21
PS 685
DEC 09
i
s your vehicle’s cooling system ready to perform in all types of weather? If you’re
not sure, test it. This should happen at least during scheduled maintenance and
climatic change services.
The combination antifreeze and
battery tester, NSN 6630-00-105-
1418, tests for freeze protection
down to -50°F. Use this only for
50/50 blend antifreeze.
Antifreeze test kit, NSN 6630-01-
011-5039, tests for freeze protection
down to -60°F. The test strips in this
kit can be used for both the 50/50
and 60/40 antifreeze blends.
Use test kit, NSN
6850-01-154-3653, to test the nitrite (corrosion protection) level
of antifreeze. The ideal nitrite concentration for 50/50 antifreeze/water solution is
between 1,200 and 1,400 ppm.
For more info on testing antifreeze, eyeball TB 750-651,
Use of Antifreeze Multi-
Engine Type Cleaning Compounds and Test Kit in Engine Cooling Systems.
You can
±nd it on LOGSA’s ETM website:
D
rivers, moisture can build up in your truck’s air brake system even in good weather.
Over time, that moisture corrodes air lines, relief valves, check valves, and the air
tanks, too.
During winter, the moisture turns to ice. Then you inherit a worse problem— ice
plugs up the air system!
If air can’t get through, the brakes won’t work. Plus, water has a habit of expanding
as it freezes. So it can burst lines and ±ttings and ruin your brakes.
Stop that problem by draining the
air tanks after each day’s run. And
don’t forget to close the air valves
after draining. Otherwise, the valves
may freeze in the open position.
By the way, if your vehicle has an
alcohol evaporator to keep moisture
from freezing in the air lines, make
sure it has the alcohol it needs to
do the job. NSN 6810-00-597-
3608 gets one gallon of methyl
alcohol.
NSN
gets a 5-gal can.
antifreeze tests
Prevent
Freezing
Air Brakes
Tactical Vehicles…
antifreeze tests
Tactical Trucks…
Prevent
Freezing
Air Brakes
Drain air tanks after each use
to prevent excessive moisture
tests for freeze protection
moisture in the
brake lines must’ve
turned to
ice!!
yikes!
no brakes!
what
happened
to you
guys!?
a test kit
could’ve
prevented
that!
why are
you all
frozen?
685.20-21.indd
1-2
10/26/09
3:10:37 PM
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