PS Magazine - TB 43-PS-716
PS, The Preventative Maintenance Monthly
ISSUE 716
JULY 2012
13
PS 716
JUL 12
That’s because special equipment mounted in or on your HMMWV—like a rear-
mounted radio, a commo shelter, an ambulance body, or an arctic personnel shelter—
often draws electricity directly from the truck’s batteries.
Turning off the master switch on the dashboard does
not
turn off the battery power
to the equipment in back.
If a switch is left on, power will continue to drain
from the batteries. Then you could be left with no
power to start your truck.
Following your -10 TM, make sure
all
electrical
switches in your HMMWV are off before you leave
the truck. If you don’t know where all of them are
located, get a medic (if you’re driving an ambulance)
or a mechanic to show you what to look for.
The white lights inside the ambulance are a
battery drain that is often missed at shutdown. Their
switch has three positions and only one ensures that
no lights come on when the doors are opened or
closed. Make sure it’s switched
OFF
.
Another switch that gets left ON is the one for the rear overhead lights in the arctic
personnel carrier. It has three positions, but only the middle position turns the lights
out when the rear door is closed.
Arctic personnel
carrier light switch in
OFF (center) position?
HMMWV…
Operators, there’s
one
question
you’ve gotta
answer
yes
to after
operating your HMMWV…
Have
You Turned
Off
All
Switches?
c’mon!
let’s
get this
show
on the
road!
I’m tryin’! it
won’t
start!!
batteries…
{
gasp
}
drained…
use distilled-deionized
water, nsn 6810-00-
356-4936, in radiators
if possible. if not, use
potable water. Ground
water contains chemicals
and contaminants that
can
clog
up the radiator.
remember!
use only
clean
water from
a
reliable
source!
also check the pressure
rating on the cap against
that listed in your tm.
feel the hoses and
replace any that
are
mushy, cracked
or
leaking.
finally,
remember
that
low
rpm
won’t turn
fans fast
enough to
keep coolant
cool. gear
down when
you need to
bump up
rpm.
when you’re
adding
coolant,
take a close
look at the
radiator
cap. check
that it’s in
top-notch
condition
and the
right cap
for your
engine.
check for
wetness around
the radiator and
hoses. wetness
means a leak.
during operations,
keep an eye on the
temperature gauge. if it
goes above the normal
operating range listed
in your tm, shut ’er
down and find out why.
716 12-13.indd
1-2
5/25/12
11:22 AM
Click here for a copy of this article to save or email.
Back to TopBack to Top
