PS Magazine - TB 43-PS-559
PS, The Preventative Maintenance Monthly
ISSUE 559
JUNE 1999
1.
Look for a stuck cartridge case
in the chamber. Remove a case with
a cleaning rod.
2.
Check the chamber, bolt, and
slide assembly for carbon buildup.
Clean them if necessary with a
chamber brush and CLP. Wipe them
dry to prevent more carbon.
M249 Machine Gun . . .
Train your gunners to handle extract-
ing problems in the field with these
troubleshooting steps:
Pages 2-22.1 through 2-25 in TM 9-
1005-201-23&P tell you how. If you
fire your M249s frequently, order sev-
eral parts kits. You’ll need them.
Check bolts to see if the extractor
pins are sticking out. If you find any,
replace the extractor, extractor pin, ex-
tractor spring, and guide pin. Any time
you disassemble a bolt, replace these
parts to prevent problems later.
if these
three steps
fail
to cure poor extracting,
the extractor needs to
be
replaced
.
PS 559
47
PS 559
46
JUN 99
hey, i
think i've got
an
extractor
problem
!
don’t worry-
-
I’ve got
clp
and a
chamber
brush
here.
rmorers, most of your M249 ma-
chine gun extractor problems can be
solved with a few inexpensive parts
and a little PM.
Replace worn-out extractor parts
with a parts kit, NSN 1005-01-383-
0168, every three years or 20,000
rounds (including blanks).
3.
Look for carbon in the gas
cylinder and gas regulator. Clean
out any with a scraper.
Extractor pin
sticking out?
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