PS Magazine - TB 43-PS-601
PS, The Preventative Maintenance Monthly
ISSUE 601
DECEMBER 2002
PS 601
23
PS 601
DEC 02
22
Before You Go to The Field
As part of your BEFORE PMCS, thoroughly check out the cartridge extractor.
Add these checks to the PMCS on Page 2-36:
• Make sure the cartridge extrac-
tor catches have a
1
⁄
8
-in hole in
each of the four catch faces. The
holes means the extractor is the
latest model. If any of the 4 catch-
es don't have the hole, the extrac-
tor is an older model and should
not
be used. Turn in the extractor
for replacement.
• Inspect the cartridge extractor
catches for burrs, wear, and corro-
sion that could prevent the extrac-
tor from working right. Push down
each of the 4 catches and release
it. It should spring smoothly back
into place. If you spot problems,
don't use the extractor. Get it
repaired or replaced.
• Attach the extractor to
the staff assembly. If the
extractor doesn't attach
firmly and completely to
the staff, it's not usable.
In an effort to
prevent misfire
accidents, TACOM-
Rock Island has
revised the PMCS
and the misfire
procedures in
TM 9-1015-250-10.
Each catch face
have
1
⁄
8
-in hole?
Look for
burrs, wear
and corrosion
Catches snap
back smoothly?
Prior to use, sleeve must
fully cover the connector
and extend all the way to
the link on the extractor
Sleeve partially
retracted—
don’t
use like this
M120/M121 Mortar…
Three soldiers lost
their lives in 2002
handling misfires on
the M120/M121 mortar
and another lost
a hand.
1
⁄
8
-in
hole
1
⁄
8
-in
hole
catch
catch
catch
catch
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