PS Magazine - TB 43-PS-723
PS, The Preventative Maintenance Monthly
ISSUE 723
FEBRUARY 2013
10
PS 723
FEB 13
11
PS 723
FEB 13
E
ver had problems with your FMTV brakes locking or the parking brake failing to
engage or disengage? It could be that the front gladhands have been replaced with
the wrong part.
On
FMTVs,
the
front
gladhands must be vented to
allow excess air pressure to
escape from the brake lines.
So when replacing the front
gladhands, be sure to use the
dummy coupling with the
vented outlet, NSN 2530-
01-477-6586.
Do not
use
the same gladhand dummy
couplings that are installed
on the rear of the truck.
Another reason for locking brakes is a corroded check valve. A continuous ±ow
of air out of the front gladhand’s vent leads to corrosion in the gladhand’s one-way
check valve. That causes the check valve to stay open. Air will continue to ±ow
through the gladhand, even after the excess pressure is vented. That’s not supposed
to happen, and your FMTV is considered NMC until the check valve, NSN 4820-01-
443-5012, is replaced.
One easy way to stop the corrosion is to service the air dryers on your vehicle
every 12,000 miles or annually, like the TM tells you.
I
s your M978A4 HEMTT tanker out of warranty? Well, good news! If the primary
fuel pump, NSN 4320-01-579-1044, fails, you can still get a free replacement pump!
Just submit a PQDR to:
warrantyclaims@defense.oshkoshcorp.com
and
dami_tacomdrs@conus.army.mil
Oshkosh Defense Corporation will want a
completed warranty claim request form, too. Get
the form by contacting their service manager,
Chris Schweitzer, at (920)235-9151, ext. 25744 or
e-mail:
cschweitzer@defense.oshkoshcorp.com
Kenneth Freeman,
kenneth.freeman5.civ@mail.mil
David Sultini,
david.d.sultini.civ@mail.mil
Thomas Hughes,
thomas.w.hughes83.civ@mail.
mil
Stephen Pedersen,
stephen.l.pedersen.civ@mail.mil
Carl S. Osterlund,
carl.s.osterlund.civ@mail.mil
Pump Eligible for
Free
Replacement
FMTV…
Give Gladhands a Hand for Good Brakes
M978A4
HEMTT
Tanker…
Pump Eligible for
Free
Replacement
Use vented couplings
for front gladhands
Be sure to give
my couplings a
hand!
ohh…that
isn’t
what
I had in
mind!
clap
clap
clap
clap
clap
clap
Or you can
go through
these
contacts
with PM Heavy
Tactical
Vehicles for
assistance…
Oh, no!
My primary
fuel pump
just
failed!
Oh, No, is
right!
Money is tight and
that part is
no longer
under warranty!
No worries!
You
won’t
be
charged for a
replacement
pump.
723 10-11.indd
1-2
12/31/12
2:18 PM
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