PS Magazine - TB 43-PS-699
PS, The Preventative Maintenance Monthly
ISSUE 699
FEBRUARY 2011
9
PS 699
FEB 11
C
rewmen, if you get careless with how you store the Copperhead extractor, NSN
1025-01-082-3586, in your M109-series howitzer, it could come back to bite you!
If you store the extractor backwards, or with the brace in the vertical position,
the brace bangs into the wiring harness that powers the slip ring contact arms. That
banging wears away the harness cover and leads to arcing and electrical failure.
The same problems occur when the brace isn’t tightened in place, even if the
extractor is stowed properly. Vibration shifts the brace around until it snags the
wiring harness.
D
rivers, there are a lot of
important cables that run along
the bottom of your AVLB’s hull.
The brake, primer, accelerator,
tachometer and manual fuel shutoff
cables, to name a few, all run under
the foor plates in the hull.
Trouble is, so does water from
rain, fording and washing. The
cables sit there marinating in the
water, sometimes for days at a
time. Damaged cables are
the result.
So, when you return from a
mission, open the engine and crew
compartment drain valves. Just
make sure you do it in an approved
area of your motor pool to avoid
HAZMAT issues.
Slide the brace forward on the
extractor shaft until it touches the end
of the ratchet handle. Turn the drive
nut on the shaft end counterclockwise
until the brace is held Frmly against
the ratchet handle.
Then, turn the extractor so that the
brace is horizontal and facing away
from the rear door when it’s stored
in the cab rack. That way, you avoid
harness damage altogether.
M109-Series
SP Howitzers…
Copperhead
Extractor Storage
AVLB…
Cable Stew
here’s the
right way
to stow the
extractor…
Never
stow extractor backwards…
…or with brace in vertical position
Stow extractor like this
Open engine and crew
compartment drain
valves to drain hull
yeow!
is that a
snake!?
nope!
you just didn’t stow
my copperhead extractor
the right way!
699.08-09.indd
1-2
12/20/10
3:22 PM
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