PS Magazine - FEBRUARY 1976
PS, The Preventative Maintenance Monthly
ISSUE 279
FEBRUARY 1976
l
KEeP SHO± hARDWar²-
NLT5 'n³ Bolts´ µIG¶·. ¸¹iº
d»¼½¾¿À MÁÂ", ÀÃ»Ä ÅÆÇÈ YÉU
Ê<ËÌp ÍÎÏCk ÐÑJÒÓmÔÕÖ
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Þß àáâ
ãäåæçèé
A track that's too tight can damage
the final drive hubs, bearings, and
gears. It adds stress, speeds Up tracK
wear and cuts down on drawbar
horsepower±
wear on idler and roLler flanges, and TracK wHip Biz±
the sides of the sprockEts±
Always adjust tracks for the enviro-
²his slaM³bang deal spalLs the tracK Ment and material you´re worKing in±
links, too, But spalled links wonµt While you can¶t stop material buildup
decrease idler or roller life. µCourse, if in the sprocket teeth in certain
yo· just have to finish a job with a conditions, you can adjust the track to
Loose track, slow down¸and stop the compensate
¹
for this buildup±
60
Fºrinstance,
the D7F»s
oPerating tracK sag is
1 y
inches¼measured Between ½dLer ¾nd
¿ront carrier rollerÀ On the D7Á the
proper sag is
ê
to
ê y
inches± SÂ, adjust
the D7F´s tracks for a
2
inch sag and
the D7Á's to
ê3
inches in "heavyÃ
stuf¿Ä
;:±
/±
Dirt oR clay packed in the sprocket
tooth causes tip wear BecausÅ there´s a
misMatch Between the sprocKet and
tracK pitch. ²his MateriaL BuiLdup aLso
increases wear on the reverse side o¿
the bushingÆ
,.±²³´µ¶·-¸¹º»¼½¾¿ÀÁ
In ÇoMe soils you´Ll get equal wear
on the LinK pins, internaL and externaL
Bushings± You can Be sure these items
are getting extra wear if the sprocKet
È
teeth are unevenLy worn.
When
yo· see
internal
Bushing
wÉar, expect tÊ ¿ind an extended track
pitch.
Increased
track pitch mËkes
other coMponents wear faster Beca·se
o¿ the Mismatch BÌtween the sprocKet
and tracK± Sprocket wear wiLL Be alL the
way to the sprocKet tips.
6ë
ÂÃ
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