PS Magazine - TB 43-PS-435
PS, The Preventative Maintenance Monthly
ISSUE 435
FEBRUARY 1989
ou can break loose a balky hub fom
tHe Final drive with a littlE help fom
a Few sprocket bolts.
±ere Are the details oF a SM²RT
tip fom RiCHard Kimball and Donald
±arris oF the ³ombat Systems Test ²c-
tivity at ²bErdeen Proving Ground:
´IF yoUr tank still has track retainer
wheels on the outer sprockets, yoµ have
the right bolts. Othe¶wise, order ·ur
or ¸ve with NSN 5306¹01º120¹4339.
»Remove two or more oF the short
bolts that hold on the inner sprocket
and put in the longEr bolts. TightEn the
bolts eve¼ly until they Are tight against
6
the ½inal drive housing. IF one oF the
"jaCk bolts¾ pushes against a Final drivE
bolt head, move it to another location .
´²s you tighten Each bolt, the bolt
will press against the housing and ·rce
the hub o¿.
.
±
'
"
±
lnstaL±a loNg
boLt a²d tighten
evenLy to "jack³
hub of
²Fter
the
hub's
been
removed,
reinstall
tHe
original
"short¾
bolts .
NEver use tHe long bolts on the inner
sprocket whEel, or on the outer whEel
unlEss your tank has the retainer rings.
FEB
89
M1-Series Tanks .±±
Give Collimator the ²Fix³
D
rying oUt a gUn tUbe Collimator (or
muzzle reÀrence sensor) used to be a
joB ·r sUppo¶t.
Not so any more, though, bEcaUse
you can wipe out moisture in tHe Col-
limator
and
replace
the
desiccator,
NSN
6850Á0¹081¹4193,
eveÃ
6
months or as needed.
±ere's how:
•
Äse a ÅÁin socket head screw key
to remove both oF tHe pipe plugs on
the barrel oF the collimator.
FEB
89
7
•
PUsH out tHe old desiccator with
a Lƹin drive pin punch and tHrow the
desiCcator aWay.
Push ouT the
old desIccator
±
SCrape any adHesive oÇ the plugs
and threads with a kniÀ. Then clEan
them with PÈD¹680 dry cleaning solÉ
vent and Clean rags.
•
ÄnWrap
a
new
desiccator
and
cheCk its color. IF it's blue, use it. IF
it's some otHer color, tUÊ it in and get
another.
DesIccator must bE BlUe
I
0
•
PUsh the desiccator into the barrel
holeË
•
Ìrap the two pipe plugs With antiÉ
seizing tape, NSN 8030¹00Á889¹3534,
and install them.
Torque the plugs to bEtwEen 120 and
130 lbÍin.
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