PS Magazine - TB 43-PS-434
PS, The Preventative Maintenance Monthly
ISSUE 434
JANUARY 1989
"'±²
he upper spindle bearings on an M
1
tank's compensating idLer Hub and arm
are harder than the spindLe metal.
They're grinding away at ±he sof±er
me±al oF ±he spindLe.
Un±iL new bushings designed to soLve
this probLem hit the FieLd, here's what
you need to do to keep your M² moving:
³ Crews, as part o´ your aFter-operaµ
±ions checks, open bo±h ¶oNt ·nders
and measure the gap between the track
end connec±ors and the #
1
skir±. IF the
gap is Less than ¸S¹inchºor iF the end
connec±ors are touching the skir±»
sing out ±o your mechanic.
¼ ½echs, here's wha± yo¾ do a± each
semiaNn¾aL
service¿or
wheNever
crews repor± ±oo Li±±le room be±weeN
eNd conNec±ors aNd skÀRs.
I
.
Wi±h ±he track oN ±he ±ank aNd
wi±h ±he coÁec± ±racK ±ensioN applied,
2
eyebaLl ±he retainer aNd idLer
a
where
±hey join. I´ there's me±aL¹to¹metaL
con±ac± a± ±he ±op and a gap a± the botÂ
±om, ±he ¾pper spiNdLe is ben±Ã The
a
m¾s± be moni±ored cLoseLy and
Lubed a± leas± oNce every dayà Check
ou±
LO 9-±350-±55-1±
or
LO 9-±350-
±64-1±
Är instruc±ions.
Metal to metal contacT here,
but gapped at the bottom?
±he spindle is bent!
±.
I´ you can inser± a 5/32Åin ALlen
wrench (ÆÇÆ
51±0-00-198-539±
Èom
±he ÆO.
1
Common ±ool se±) iN±o ±he
If tHE wREncH fits² tHe SP³nDLE
and beaR³ngs a´e WoRn
JAN ²³
gap beÉween the retaÊner and the ÊdLer
arm at the ËÌont, tHe uPper spindLe and
bearings are worn.
Again, the arÍ must be monÊtored
cLoseÎy and LÏbed every day. When tHe
gap is ¸4¹inch, rePLace the compensatÂ
ing idLer arm.
MecHanÊcs, Ê´ you donÐt have to
rePLace the idLer arm, but the end conÑ
nectÒrs are wi±hin ¸SÅÊn oF ±he#
i
skirt,
move out the ·nder skÊrt support wÊth
shim, ÓÇÓ
´365-01µ10±-4737¶
Use as
many shims as necessary, as Long as
JAN ²³
·
ÇhiÔming iÕs±ruc±ions are FÖund in
TM
9¸±350-±64-±0-1-5
on ×ages
16-
1±1
through
16-1±4
and in TM
9¹±350¸
±55-±0-1-3-4
on ×ages
7-±55
through
7-±60.
As a reminder, when you're working
on ±he skÀØts, never open ±wo skir±s at
the same ±ime iF ±hey have the same
hinge lineà The hinge can't ±ake ±he
weigh±, and neither can any part oF
your body ±ha± happens ±o be in the
way iF ±he sKirts FÙLL.
NeveR Have
sk³µs that
sHaRe the
same h³nge
oPEn at tHe
same time
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