PS Magazine - TB 43-PS-719
PS, The Preventative Maintenance Monthly
ISSUE 719
OCTOBER 2012
14
PS 719
OCT 12
R
esist the urge to plug a leaking front air system gladhand on your FMTV truck.
If it’s plugged, the parking brake won’t be able to lock the spring brakes on the rear
wheels.
The gladhands must vent as designed when the truck is placed in SYSTEM PARK
so it won’t roll away. Any plug used to seal off a gladhand takes away the venting.
If the spring brake system doesn’t work right, the truck will
roll when put in SYSTEM PARK. Then that truck you were sure
would stay where you left it could end up really close to you—
maybe too close!
So when you’ve got a front gladhand leak, get a mechanic to
±x it. Most of the time, the problem can be ±xed by servicing or
replacing the one-way check valve inside the front gladhands.
Note that your truck’s rear brake could also seize in freezing
temperatures. If your rear brake seizes, check to see if there is
snow or ice on the front bumper’s service gladhand vent.
If there is, remove the snow and ice by lightly tapping the
gladhand vent. That may solve the problem.
If it doesn’t, wait about 10 minutes to see if that makes a
difference. That short delay can sometimes produce good results.
Still have the brake problem? Time for a mechanic to do some
brake troubleshooting.
Avoid
frozen
Pipes!
FMTV…
Plugged Gladhand Can
Lock
Brakes
M1142 TFFT, M1158 HEWATT Trucks…
Avoid
FROZEN
Pipes!
Too
easy!
Hello, Soldiers!
I was on my
Facebook page the
other day and one
of my friends asked
us to talk about
firefighting.
He wanted us
to remind you
firefighting
engineers that
it’s time
to
blow out your
tactical fire
fighting trucks
(TFFTs) and
HEMTT-based
water tender
trucks (HEWATTs)
before
the cold
weather hits.
drivers, get
a
mechanic
to
fix a gladhand
leak. it’s
not
your
job!
make sure
I’m
not
plugged!
You can find the blowout proce-
dures for the TFFT in WP 0044 of
TM 5-4210-249-13&P-1 (Feb 09).
Blowout procedures for
the HEWATT are in WP 0033 of
TM 9-2320-328-13&P-1 (Mar 09).
if you
don’t
blow
water out of the
pump and pipes in
your TFFT and HEWATT
trucks, cold weather
below 32°F could
damage
them when
they aren’t in use.
I’m gonna
plug
that
leaking
gladhand!
don’t, unless you want
my
parking brake
to
faiL!
719 14-15.indd
1-2
9/4/12
2:35 PM
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