PS Magazine - TB 43-PS-631

PS, The Preventative Maintenance Monthly

ISSUE 631

JUNE 2005
PS Magazine - TB 43-PS-631 - Page 9 of 33
PS 631
JUN 05
15
here’s how
to fix those
problems…
… while
they’re still
small!
Check the coolant
level often. Before
you roll, when the
engine is still cool,
make sure the
coolant is up to the
mark.
While you’re
adding
coolant,
take a close
look at the
radiator cap.
Make sure
it is in
top notch
condition
and is the
right
cap
for
your
engine.
Check for wet-
ness around
the radiator or
hoses. Wetness
means a leak.
During operation,
keep an eye on the
temperature gauge.
if it goes above the
normal operating
range noted in your
TM, shut down and
find out why.
Remember,
too, that
low
RPMs don’t
turn fans
quickly enough
to keep
coolant cool.
Gear down to
create
more
RPMs.
if it’s low, add
coolant to bring the
level up. Never over-
fill, though. When the
engine heats up, the
extra coolant will
overflow.
Add coolant
only
when the
engine is cool.
Adding coolant
to a hot engine
can crack the
engine block or
burst a seam in
the radiator.
A 60-40 mix is
best, but main-
tain
at least
a 50-50 mix of
antifreeze and
water to raise
the boiling
point of the
coolant so it
won’t boil
away like plain
water.
Check the protection level with
tester, NSN 6630-00-105-1418.
remember!
use only
clean
water from
a
reliable
source!
Use distilled water, NSN 6810-
00-356-4936, in radiators if it’s
available. if not, use potable
water. Ground water contains
chemicals that will
clog
up
the radiator.
dude!
wait for
me to
cool down!
Check coolant level
in radiator…
Plain water
BOILING POINT 212°
BOILING POINT 226°
BOILING POINT 230°
50% antifreeze
50% water
60% antifreeze
40% water
…or surge tank
make sure
you’re using
the
right
cap!
Check the pressure
rating on the cap with
that listed in your TM.
Feel the hoses
and replace all
that are
mushy,
cracked
or
leaking.
631.14-15(C)
4/28/05
6:28 PM
Page 1
Back to Top
Back to Top