PS Magazine - JUNE 1986
PS, The Preventative Maintenance Monthly
ISSUE 403
JUNE 1986
M60 Machine Gun .±²
?t'
Head Off Bolt Problems
When an
m³´
machine gun fails
to extracT or eject, suspect the breech
boLt.
±he bolt's extractor and ejecTor
springs weaken fast² ±hat's why you
armorers MusT TesT The springs regu-
larly²
Use your tHumb to press up and in
on the extractor. ±he exTractor should
not depress easiLy and it should sprIng
back without hesiTation²
With a punch or any tooL wiTh a
flaT point, press the ejecTor in² ±he
ejector should also depress wiTh ef³
fort and spring back wiThout hesi´
tation²
µf eiTher spring is weak¶ replace iT²
One final sTep: Eyeball The breech
bolT face² An out·of¸round fIring pIn
hole or one wiTh pitted edges causes
mIsfires and other fIrIng probleMs²
,
±
: '±
JUNE 86
Hole to HoLe
±he gas pisTon fiTs eiTher way, buT
The wrong way means your gun shoots
once and quITs talkin'²
±o put The pisTon in right, just
remember That holes go wiTh holes²
±he hoLes of The pIsTon match those
of The gas cylinder² ±he end wITh
hoLes goes in the cyLInder lasT²
When you check ouT
an
m³´,
Make sure The gas pisTon's righT by
holding The gun Muzzle·up to The
LighT² µf the pisTon's righT¶ you'LL see
The LighT Through The hoLes²
±he cleanIng rule for The gas pis´
Ton is¹ ºf iT woN»T sLide¶ clean it¼ A
cLean pIsTon wILl sLIde easiLy In The
gas cylInder when you TILt The gun²
CLean The p½sTon wITh C¾P² Wipe
²ip³D ´iv³TS µK?
±here¿re Three dIfferenT Types of
µ³´ µg
bipod pIvoTs fLoaTIng
aroundÀ ±wo Types are OK; one is
noT²
±he oLder of The TwoÁ ÂSÂ
1´´5-
´´¶ ´2 ´-8³84·
P/Â
7793´1´·
Is
shown as ºTem
³
in Fig
C¶4
of ±Ã
9-1´´5¶224-24¸
±he parT thaT goes
oveR The baRreL has BeveLLed edges²
Ähe newesT BIpod pIvoT has the
saMe ÂSÂ and parT nuMBerÅ
ºT has a
3/
16ÆIn Lip ThaT ÇIts agaInsT
the ÇLash suppressor² ±heRe
aRe no beveLs¼
JUNE 86
5
PUt ENd wItH HolEs
IN ¹yLIºdEr LAst
iT dry before putTIng IT back² Èeave a
LighT coat of C¾P on The pIston when
you're goIng To sTore The gun²
THE OldEr
p»vot HAs
bEvEllEd
Ed¼ES
THE NEw pIvot
HAs NO
bEvEllEd
½
Ed¼Es
ÉoTh acceptabLe pIvoTs are one´
pIeceÊ forged MeTaL²
±he pivot you should noT use is the
early one, which has no part number
stamped on It² ËepLace iT¼
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