PS Magazine - JULY 1984
PS, The Preventative Maintenance Monthly
ISSUE 380
JULY 1984
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Think slacK-not sag±when you ad²
just the trac³ on your D7´series or D8µ
tractor.
So wHat's the ¶ifFerenCe? Sag is
measured between ·He i¶Ler aN¶ the
Front traC³ support roLler. SlaC³ is the
dif¸erence between ·He aC·uaL LeNg·H oF
·He trac³ and ·he to·Al leng·H oF ·he ·rac³
system. One inCh oF slaC³ i¹ ·He ·RaC³
has proven to be the ideaL tensioN.
Track length miNus system
lengtH equals sLack
The slacK me·hod is easier and more
accurate than ºhe sag method shown in
ºhe dozer TM»s.
You use the sag measurement as a
quIcK guide ºo ·e¼¼ when to adjus· the
tracK½
To adjUst the ·racK, parK the ºractor
on ¼eVel groUnd. DriVe ¾rward and
coasº to a stop without Using the braKes.
¿ay a sºraIght edge across th
À
e top oÁ
ºhe tracK ÁÂom the Áront sUpport roller
to ºhe idler. ÃÁ ºhe sag Is Äore ºhan
1±/2
PROpE²
S³CK
15
´µ¶· A
¸oMF¹º»B¼
b½¾¿ ÀÁ
ÂÃ , ÄÅÆ
TOo
ÇÈGÉÊ
ËÌD ÍÎÏ
TOoL±²Se!
-±=
²
³´.
Inches ¾r a 07 or more than
Ð
InÅhes
on a D8, itÆs time to adjUsº the slacK½
Open the pÇate oVer the hyÈrauÇIc
tracK adjusºer to get at the adjusºIng
ÁIttIngs½
ÑuÒÓ in
grease
The tracK will be almost straighº be²
ºween the Front sUpport roller and the
i¶ler. ÉemoVe the grease gun.
ÊarK the trac³ roller fraËe
Ô/2
inch
behind the rear edge oÁ the idler bear²
iNg wear plate.
Open the relieÁ valve. ÌhecK iF the
tracK has loosened, bÍt
ÕÖVÖ×
looK
into ·he reLieÁ Valve to see iÁ grease is
escaping. You might be blinded by an
eyeÎl oÁ highÏpressure grease.
Start the traCºÐr and move it baC³Ñ
wards unºil the idÒer bac³s up
Ø/2
inch
or more. The pipe should be at about
·he
ÙÐ
oÆcloc³ positioÓ½
Move the tractor FÔrward un·il ·he
Pipe is Áree. Shut of¸ the engine and
reÄove the pipe.
Ìlose the reLieÁ Valve.
Ìonnect the grease gun to the Áitting
an¶ pump untIl ºhe rear edge oÁ the idler
bearinG wear plate is even with the
ÄarK on the roller ÁraÄe.
ÕeÄoVe the grease gUn. ̼ose the adÖ
Juster cover pLate½
Õepeat ¾r the ·racK on the other side.
The sag Äay Vary depending on the
vehiCle, but the proper trac³ tension is
there.
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