PS Magazine - JANUARY 1973
PS, The Preventative Maintenance Monthly
1973 SERIES, ISSUE 242
JANUARY 1973
I
!
±²
Your M551 SheRidan can have any one
Of
3
different types of ammunition detent
assemblie±. They all work Che same so why
do you have to be abLe to Cell Chem apar²?
Good question!
If you have a Type I³³ you don't need
Co removE or
clean iC for the
600
´Fµ
round Lif¶ of the pressure vessel· In fact,
direcC support ¸ai¹enance pe
ple can
ins²aLLº replace or service a Type III, and
they have a speciaL tooL to do it with»
So ¼ake a look at the detent in your
Sheridan.
TYPE I AMmUNItiOn DETENT-
115784±9 FSn !²25
³
185
´
8²²²
(
VenµED
)
PACKING, PREFORMED-11578420
/
fSN 533±²169²±953
SCReW-MS³1³6³´µ³
fSN 53±5¶9·±¸9533¹
l '¶
LoNg
µYPE II AmMuniTIOn DEµe·µ
¸±5784±5 fSn
¹
²
2
5
º
±»9
¼
²558
½
VenµeD
¾
¿
>±
.
±
The Type I³³ has a small diameCer shaft
while a Type I or Type II shaft is thicker.
The
Type
III
a½so
has
"Type
II¾¿
sta¸ped on the coVerÀ
A decal reading-ÁYP´ I³ AÃÃUNIÄ
TIÅN D´T´NT INSTAÆÆ´D-is issuÇd
with
each
Type
ȳ
deCent
and
new
É52ÃÃ µannon Pressure ÊesseL AssemË
ÀYPE ILL AmmuniTiON DETEnµ
115784»2 ÁSn 1²25
´
47²
Â
1»»4
½VEnµeD)
bly. Ìut it on the coupling between the
detent assembly shaft anÍ the quadrant
The detent needs careful hanÎling reÄ
gardless of which type iCÏis.
Detent
ho½e
sea½ing
surfaces
can
be
ÍestroyeÍ By corrosion anÍ erosion iÐ the
deCent assemb½y is not c½eanedÑ tightened
and maintained on schedule·
Type I
and
Type I¾ deten²s
are reÒ
ºsn
oÃ
Scr»w
ÄÅÆÄÇÈÉÆÇÈÄÅÅ
(ms³¼³½³¾¿³)
Ê
Ë/
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