PS Magazine - TB 43-PS-671

PS, The Preventative Maintenance Monthly

ISSUE 671

OCTOBER 2008
PS Magazine - TB 43-PS-671 - Page 9 of 33
14
PS 671
OCT 08
15
PS 671
OCT 08
Dear Half-Mast,
Those of us in the sandbox are glad to have MRAPs in our unit. But we
really need more help with training and maintenance for this vehicle. Is there
a solution for us outside of MRAP University and the MRAP contractor field
service reps?
1LT D.H.
R
eplacing a flat tire on your M939-series truck gets a whole lot harder if the spare
tire is missing. But that’s what can happen if you don’t take steps to keep the spare
in place.
Vibration
during
operation
can
loosen the wing lug, NSN 5340-01-
089-3126, that holds the hinged wheel
brace against the spare tire. Although
the retaining pin, NSN 5315-00-810-
3701, is supposed to keep the wing
lug from coming completely off, it’s
often missing.
Even with all parts in place, the
brace can be pretty loose by the time
the lug hits the retaining pin. If you hit
a big enough bump, the spare tire may
go flying.
Your best bet is to further secure
the tire with the chain and padlock
from your truck’s BII. Run the chain
through the center of the spare tire
and around the mounting bracket
pipe. Snap the padlock in place and
that spare will be there the next time
you need it.
MRAP
Vehicles…
Training
Materials
and Tech
Manuals
M939-Series 5-Ton Trucks…
Rein in Runaway Tire
If wing lug
loosens
enough,
spare tire
can bounce
out
did you
hear
that
bump?
yeah,
wonder
what it
was?
yes,
lieutenant
d.h.,
there is.
all available training
materials and technical
manuals for the mrap
family of vehicles are
located online.
you can get to them in
the downloads area on
eordnanceu using this link:
portal/index.php
you’ll have
to use your
ako login and
password. just
click on the
MRAP version
you have and
scroll through
the info.
by the way,
you
won’t
find these
commercial
MRAP TMs on
LOGSA’s ETM
Website.
671.14-15.indd
1-2
8/25/08
6:26:25 PM
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