PS Magazine - TB 43-PS-667
PS, The Preventative Maintenance Monthly
ISSUE 667
JUNE 2008
10
PS 667
JUNE 08
Dear Half-Mast,
We have looked and looked but we can’t find an NSN for the half-doors
used on the Avenger’s HMMWV. Can you help?
CW4 D. W.
Dear Editor,
The ethernet cables transmit the
computer information that’s so vital
for accurate firing by the MLRS and
HIMARS. But the cables themselves
are one of the most fragile items on
the system and one damaged ethernet
cable can stop the MLRS in its
tracks. MLRS crews sometimes refer
to this as “death by ethernet cable”.
So you want to do everything
you can to protect all 20 ethernet
cables. The best way is to leave
them connected. If you continually
disconnect and connect them for
cleaning and maintenance, the middle
of the cable connector gets crunched
down. The cable starts having trouble
carrying information.
But the ethernet cables do work
loose from the tremendous vibration
of the MLRS during travel and
operation. Loose cable connections
mean poor or no information goes to
the gunner’s display unit. So during
your weekly PMCS you need to
gently
check all the ethernet cable
connections for looseness.
Dear Chief D.W.,
Certainly. The right-side door comes
with NSN 2510-01-350-2516 and the
left-side door comes with NSN 2510-01-
370-4264. They’re part of Fig 121 in TM
9-1440-433-24P.
Editor’s note:
Those are excellent ethernet suggestions that will save MLRS units
lots of troubleshooting frustration! Thanks.
The TM says the cables should be tightened
to 21 lb-in if they’re loose. Use a torque
wrench to do this. Don’t guess at the torque.
SFC Bryan Matthews, SSG John Newton
SSG Jerid Lantrup
HHB, 1/78th FA
Ft Sill, OK
MLRS, HIMARS…
Easy with Ethernet Cables
Avenger
Missile
System…
Where
Do
You Get Half-Doors?
Over-tightening cables crunches
center of connector
Gently feel
cables for
looseness
Disconnect ethernet
cables only when
absolutely necessary
shoot,
somebody
stepped on
my half-door
again and
bent it.
now I
need a
new one.
I know. I just
wish I knew
how to order
a new door.
I seem to be
having trouble
communicating
with my gdu.
it’s like
my brain
has loose
wires!
…
we
may
have
over-tightened
one of his ether-
net cables.
hmmm…
667.10-11.indd
1-2
5/5/08
6:12:58 PM
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