PS Magazine - TB 43-PS-427
PS, The Preventative Maintenance Monthly
ISSUE 427
JUNE 1988
M1
Tanks .
.±
Mistakes you make when installing the gunner's primaRy sight body assembly
into the turret wiLl come back to haunt you as ±eaks.
Two mistAkes you want to avoid a²e sloppy c±eanup befoRe instal±ing the GPS and
use oF the wroNg sealant.
You must cleaN ³he tu²Ret access lip completely be´re you install the GPS. That
means two mechs using-two putty kNives, µ¶D·680 so±vent and lots oF rags.
¸ny Residue ¹ou leave behind will keep ºhe cOmpound »om sea±ing, which ±eads
to leaks.
Clean under
the lip all
aRound
the GPS
housing .±.
. ²± and run a bead of sealing
compound aroUnd the outside edge
¼Nce the cleanIng job's done right, insta±± ½e GPS.
¸Fter it's in place and
tightened down, rUn a bead oF sea±ing compound, ¾S¾ 8¿3¿ÀÁÁÀ275À811¿Â around
the lip oF the sight body and the turRet.
Ãhe sealing compound is Ätem 5¿ in
¸ppendix ¸ oF TM 9Å235¿Æ255Æ2¿Æ2À3À3Ç
Do not use aNy oÈeR sealer For this job. Silicone sealer, aÉhesive, gasket cement
or gasket sea±er wi±l Not work.
The word on how to insta±l the GPS is ´und on µages 7Ê25 through 7Æ32 oF TM
9Ê235¿Ê255Ê2¿Ê2·3·3Ë Take no shoR³cuts and ºhere'l± be no ±eaks.
@[
±
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Valve
AccumUlator Charging Device ²³´
Gage
NSN
³lug
NSN
4730-µ0· 729· 7087
You may not have to Replace ÌHe enti²e
accumu±ator charging device,
¾S¾
4933ÊÁ1ÊÁ4ÍÊ71¿9Â iF just a piEce or
two is missing or busted.
Îere are the ÏVai±ab
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Valve assembly
NSN
Hose asseMbly
NSN
4720¶00¸1¹5¶02º6
Adapter
NSN
4820-00-245· 7699
NSN
Hose asseMbly
NSN
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