CASE CONSTRUCTION 1150M - Undercarriage Wear

6-WORKINGOPERATIONS
Undercarriagewear
Factorscontrollingundercarriagewear
Youcanprolongundercarriagelifebyunderstandingfactorsthatcontributetowear.
Soilconditionsareamajorfactorindeterminingundercarriagewear.Nonabrasivesoils,suchassiltandclaycause
theleastamountofwear.Wet,sandysoilsarethemostabrasiveandcausethemostwear.
Workinginrockyconditionsandothersurfaceswherethegrouserbarsdonotpenetratecauseshighimpactand
twistingloadsonthetrackchains.
Followtheoperatingandmaintenancetipstohelpyougetthemostlifefromyourmachine’sundercarriage.
Wearfactorsyoucancontrol
Minimizetheeffectsofpackingbycheckingtracktensionfrequentlywhenworkinginmud,snowandwetsand.Pack-
ingcancausetrackjumpingandbanging.
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Severepackingofmaterialsbetweenundercarriagecomponentscauseswearbyincreasingtracktension.
NOTICE:Runningtracksthataretootightgreatlyreducesthelifeofthebushingandsprocket.Operatethetracksat
therecommendedtension.Thiswillincreasethebushingandsprocketlifeby2.5to3times.
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Operatingtechniquesandmaintenancealsogreatlyaffectundercarriagelife.
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Avoidspinningthetracksasmuchaspossible,especiallyinabrasivesoilconditions.
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Avoidlongrunsathighspeed,andlimittheamountofreversetravel.
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Avoidfrequentreverseoperation.Keeptravelspeedtoaminimumwhenworkinginreverse.
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Speedimpact,turning,anddirectionofoperationgreatlyaffectwear.
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Workupanddownaslopeinsteadofacrossit.Thisdecreaseswearonrollerangesandlinksiderails.
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Checktracktension,andcleantheundercarriagemorefrequentlywhenworkinginhighpackingconditions.
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Constantlyturningthecrawlerinthesamedirectionwillcauseunevenwear.
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Usethesmallesttrackshoespossibletominimizetrackchaintwisting.Limittheuseofwidetrackshoestootation
applications.
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Parkthemachineonlevelgroundtopreventsealdistortion.
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Cleantheundercarriagemoreoftenwhenoperatinginfreezingconditions
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Parkthemachineonplanks.Thisisparticularlyimportantincoldweathertopreventthetracksfromfreezingtothe
ground.
Howtoextendthelifeofsealedtrackandlubricatedtrack
NOTE:Turnthebushingsatthe100percentlimit.
Lettingthepinsandbushingsruntodestructionresultsinacceleratedwearofothercomponents.Thepinsand
bushingsshouldbeipped,endtoend,withthelubeholeremainingDOWNforproperlubrication.Contactyour
authorizeddealerorseetheServiceManualforthismachine.
ExtendedLifeTrack
TheExtendedLifeTrackchainincorporatesabushingthatisfreetorotateonthestandardlubricatedtrackbushing.
Wearisdistributedovertheentirecircumferenceofthebushing.Thebushingisfreetorotatewithoutcreatingthe
scrubbingactionbetweenthesprocketandthebushingasinconventionalcrawlertrackchaindesign.
AmajorreductioninwearontheExtendedLifeTrackchainistheexternalbushingwearcausedbythesprocket
contact.TheExtendedLifeTrackbushingrotateswiththesprocket.Thewearpointisprimarilybetweentheouter
andinnerbushing.Asthechainwearsitmaybecomemore“noisy”undercertaintransportingconditionsduetothe
wearbetweentheinnerandouterbushings.Thisisnormal.
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