PS Magazine - TB 43-PS-713

PS, The Preventative Maintenance Monthly

ISSUE 713

APRIL 2012
PS Magazine - TB 43-PS-713 - Page 23 of 33
42
PS 713
APR 12
Dear Half-Mast,
We have M40/M42-series masks that either never had MWOs 3-4240-
346-20-1 or 3-4240-346-20-2 done or need to have the -20-1 MWO
re-done. But the MWOs expired several years ago. What should we do?
SFC S.H.
MWO 3-4240-346-20-2 replaced the
outlet valve disk with an improved disk that
minimizes the chance of the disk collapsing
into the outlet valve housing during extreme
negative pressure checks.
If the outlet valve disks in your masks are
olive green, you’ve got the new disks. If not,
order the disk with NSN 4820-01-502-7372.
Of course, the best way to get the most
out of your mask is to do the weekly PMCS
called out in the -10 TM. Don’t let your
mask sit in the CBRN room. Give it the
attention it needs.
Dear Sergeant S.H.,
Since the MWOs have expired, the Army no longer supports them. MWO 3-4240-
346-20-1 applied a retaining clamp (zip tie) to the facepiece to prevent the silicone
rubber from separating from the outlet valve housing. If the clamp was never
installed or it has worn out, you have two choices:
Order the clamp installation tool for $251 at:
In the SEARCH box, type 78F547 and click FIND.
For 1,000 clamps for $70, go to
In the Part Search box, type 298-
1045-ND and click the GO button.
Unless
you
have
quite
a
few
masks that need the clamp, this
isn’t cost-effective. In that case, just
order new facepieces:
•±
small, NSN 4240-01-415-4517
•±
medium, NSN 4240-01-415-4518
•±
large, NSN 4240-01-416-0430
What you shouldn’t do is try to replace the clamps with ones you ±nd locally.
Those clamps have not been tested for strength and durability.
Dear Half-Mast,
The BA-5800/U battery, NSN 6135-01-440-7774, is supposed to be
used for the ICAM (improved chemical agent monitor), but FED LOG says
the battery is a terminal item (AAC V). What should we use instead?
MSG M.E.
Dear Master Sergeant M.E.,
Even though the NSN is a terminal item, the DOD EMALL shows there are
more than 5,000 packages of 8 BA-5800s in stock. So you can continue to use the
BA-5800 for some time. Once it’s depleted, order non-rechargeable battery BA-
5380/U, NSN 6135-01-517-4954.
Or you can use rechargeable battery BB-2800/U, NSN 6140-01-490-5372.
The BB-2800/U will normally power the ICAM for 9 1/2 hours. To recharge the
BB-2800/U, you will need the PP-8498/U charger, NSN 6130-01-495-2839,
and an adapter, NSN 5940-01-493-6750. It lets you charge two
batteries at once.
M40/
M42-Series
Masks…
Help for Expired MWOs
ICAM…
{
boo
hoo hoo
}
I never
got those
mwos
that were
supposed
to make me
a better
mask!
now the
mwos have
expired.
all is lost.
maybe
not. let me
see what I
can do.
I don’t know, but I
think master sergeant
half-mast might!
What
Battery
Do We
Use?
Buy new
zip ties and
tool or just
get a new
facepiece
New outlet valve disk comes with NSN 4820-01-502-7372
Zip-tie
Disk
713 42-43.indd
1-2
3/7/12
5:30 PM
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