PS Magazine - SEPTEMBER 1983
PS, The Preventative Maintenance Monthly
ISSUE 370
SEPTEMBER 1983
have to be reversed. If the undercut is
wOrn down on bOth teeth, both drive
sprockets on that side have to be
replaced.
ALways replace sprockets in pairs.
AND make sure both sprockets in the
pair are the same thickness. There
are Both
I
Y-in and
I
±²in thick
sprockets in the fieLd. ³nly
i
±-in
sprockets are in suppLy´
If your tank's sprockets donµt have
the built¶in wear indicators, borrow
your mechanicµs sprocket tooth wear
gage, ·S· 5120¸00²563¶7320¹ (Itµs a
part of the special tooLs in the tank's
²20P TM.) Set tHe gage oº »He
sprocketµs ¼oUnt½ºG bo¾ts s¿ tHe
gage is over a tooth.
If the tooth is worº beloW tHe
undercuts, reverse the Àair ¿r reÁ¾ace
them.
Getting It TogEther
·ow youÂre ready to put the track
Back togetheR. Ãse the tankerÂs bar
and Lift the track back into place. Put
on the track Fixtures. Äighten them
aLternateLy until you can put on the
enÅ connectorsÆ If you donÇtÈ the
fixtuRe jaw can break and fLying
metaL can injure yOu. Érive tÊem on
untiL they are against the FixturesË
Ìut the ceÍter guide back. Éonµt
tighten it yet ´.
. Just snug up the nutÎ
Ä!Ke tÊe tracK fixture oÏfÐ Érive
the end cÑnnectors the rest of the
way On´ Ähey may Òave to be moved
in or out on the pins fÓr the wedges
14
tO fit into the pin's notches.
Put in the wedges and the bolts but
donµt tighten them dowº. Snug the¼
up like you did the center guide ºut´
Some tankers tighten the end
connectors and ceºter guides at the
point of replace¼ent´ That's wrong
because the wedges wonµt seat. The
track shoes have to be in exactly the
right positionÔat a 16Õdegree
angleÖwhen you tighten the boltÆ
×tÊerwise, the wedges wi¾l not fit
into the ØOtches cUt in the pins. Ähe
wedges will ride high. The boltÙ will
Loosen up right away and track
Úilure starts right awaÛ, too.
Ähereµs Only one placE around the
entire track where the shoe Üins are
at the right angLe´ That's from 8 to 11
OµcLock on the compensating iÝÞß on
the Left side, and frO¼
i
to
4
oµclOck
on the compensating idLer on the
right sideÆ
Ähe problem is, yoU can tighten
only the 8 and
9
oµclock and
i
and 2
oµcLock inboard end connector
wedGe bolts. àou can't get aáwrench
on the othersâ àoU'll have to ¼Ove
the tank to get the other bolts in the
riGht position.
·ow ¼Ove tãe tank backward
until
the
shoe
with the
·
end
connectors to be tightened is on the
±
cO¼pensating idlerÆ äet the torque
wrench fro¼ yoUr ¼echaºic and
tOrque the bolt to 180¸200 lb²ftÆ Too
±ORqu²
³O
180-200
_±,.²³´
lb´fµ
mUch torque is as bad as too Little. åf
you use too ¼uch tOrqUeæ yoU can
twist Oç a bolt and have to start
again. åf yoU use too littlè, the bo¾t
will loosen Up riGht away.
Move the tank forward éntil tHe
center gUide to be tightened is
between the ·¿.
±
road whee¾ aºd the
compensating idlerÆ TorqUe the nUt
to 350²380 lb²ft´
B¶F·¸
you
tuên
²n
¹H º»¼U½
ërìCíî ïðñQUò aló tôõ
New
ö÷s ør
thE
ùúgûlü ýþÿs
TO
2Ā¸āĂ lă²ĄąĆ
Track ¾ens¿on AdjÀstmenÁ
±.
Move tHe tanć forwarĈ oº ĉ HaĊĈċ 3´ Čeasure the distance between the
¾evel sUrčce aºĈ c¿ĉst to a stoÀ string and the end cOnnector midway
w½thoUt app¾ĎiºG tHe brĉćes ¿r between the
2
support rO¾¾ersÆ THe
steeriºg.
2. Place a string with weights over
the end connectors at the ·oÆ
I
and
·o. 2 sUpport rollers. The striºg has
to extend below both rOllers.
POS³ÃON S³RÃNÄ Ov²R
:³´;µ¶
µ¶·
fi
CONN²C³OÅS Ƴ
SuppOÇ ROll²RS
¸5
inch.
4·
ďfter you get the right tension,
tighten the adJUst½ng link ¾ocking
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