PS Magazine - APRIL 1975
PS, The Preventative Maintenance Monthly
ISSUE 269
APRIL 1975
MSO
N
PERI
s
CopE
±
Your mechanic will purge the L50 and
L51 periscopes with nitrogen evefy 90
days. This purging prevents moistUre
buildup and keeps your sights sharp and
accurate± The procedure Is In TM 75²-l³6±
PUT
²³
;´
µ-¶
LASER FILTER
1±²
ON BEFORe
OPERATinG
RANGE
FiNDER
NO´ DON'T± Never. DO µO¶± When
traversing the tUrret wIth thE gUnner's or
· commander's controls,
DO
NO¸ release
f±Rst-²
CONTROL
HANDlEs
iN
NEUTRAl .³.
´µ¶ TH·N
RElEAsE
PAlM
SW±tCHES
swItches
contrA
hand¹es are In neUtral± ºF you let go BeFore
they're comP¹etely in neutral»
¼
tHe gears
can get s½rIpped. ¾ beeFed Up gear box Is
beIng pU¿ In a¹l newÀ¾2's to prÁvent tHIs.
c .
WHen operatIng the tÂrret In the power
Scopes wità triple capabIlIty Äor or stabIlized modes» be alert For viBratIon
daylight, InÄrared and passive sightIng In theÅ gear boXÆ ¸hat's a sure sIgn ItÇs
oughta be treated with care´ Never coming loose and needs to be tightened.
operate the night portion oF ÈÉ50 and L5Ê
In daylIght´ These
Ë
are IntensIFIer scopes
that can be severely damaged by
day¹ight´ ÌÍ sure the passiveÀon indIcator
lIght is
glowIng red when you're ÎÏ
operating at night.
Ð
Cables leading ÑRom the L50 Ònto the
reticle projector and cables coming From
the computer unit and the smal¹Ór cable
From the reticle into the sÔabilization UniÕ
must be secured aFter the Öscop× is
Øngage the turret manua¹ lock when
removed For maintenance. Dangling yoU're not operating the turret´ ¾ loose
cables can get caught in the turret ring lock can wreck the gear boX and knock
gear.
out its noÀbak±
8
·± ²
..±
· ²³´
³´-µ.¶¸¹º
Ùut Úaser Filters on the perIscopes beÛ
µ
Fore Firing the laser´
The
laser
range
Finder
should
be
boresighted and the auXiliary telescopes
alIned with the range Finder beFore you
operate the range Finder. Stick by theÜ
¶
³-´·
»N¼½¾¿ÀÁ;=Â
,ÃÄ
boresIghting procedure in the book and
;:
you'll be on target every time.
¾ rÝadinG oF 9995 on the range Finder
means you didn't get a return From the
target
Ë
and
that
youÞre
not
readß to
operate. Several things could be àrong.
Ìe sáe the ballistics shield Isn't over the
oUtpUt port, clean the eXternal optic and
check the Boresightinâ. ãvery now and
then this reading will show Up when it's
raining so don't panic and thInk yoUr
eqUipment is deadlined´
äF you press and hold the range bUtton
on the gUnner's or commander's controls,
the malFunction lIght will come on´ åest
way to operate the range button is a Firm
Press For a second andæ releaseç äF the
ma³FUnction lIght stays onè you do have
problems.
9
pIece oF tape on the laser/transmitter
receiver lens. Don't remove it´ This tape
activates the counters aFter the laser is
FIred.
Tée boresight bolts on the laser must be
kept at 35 Ft lbs by your uêit mechanic´ äF
this is not done, the laser comes out oF
boresight a lot Faster than you can put it
in.
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