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TorqueSpecications

Therecommendedfastenertorquevaluesarelistedinthefollowingtables.For

criticalapplications,asdeterminedbyT oro,eithertherecommendedtorqueora

torquethatisuniquetotheapplicationisclearlyidentiedandspeciedinthis

ServiceManual.

Thesetorquespecicationsfortheinstallationandtighteningofthefastenerswill

applytoallthefastenerswhichdonothaveaspecicrequirementidentiedin

thisServiceManual.Thefollowingfactorsmustbeconsideredwhenapplying

thetorque:cleanlinessofthefastener,useofathreadsealant(e.g.,Loctite),

degreeoflubricationonthefastener,presenceofaprevailingtorquefeature

(e.g.,Nylocknut),hardnessofthesurfaceunderneaththeheadofthefastener,

orsimilarconditionwhichaffectstheinstallation.

Asnotedinthefollowingtables,thetorquevaluesshouldbereducedby25%

forthelubricatedfastenerstoachievethesimilarstressasadryfastener.The

torquevaluesmustbereducedwhenthefasteneristhreadedintothealuminum

orbrass.Thespecictorquevalueshouldbedeterminedbasedonthealuminum

orbrassmaterialstrength,fastenersize,lengthofthreadengagement,etc.

Thestandardmethodofcheckingthetorquecanbeperformedbymarkingaline

onthefastener(headornut)andmatingpart,thenbackoffthefastener1/4

ofaturn.Measurethetorquenecessarytotightenthefasteneruntilthelines

matchup.

IdentifyingtheFastener

g206088

Figure2

InchSeriesBoltsandScrews

1.Grade12.Grade53.Grade8

g206089

Figure3

MetricBoltsandScrews

1.Class8.82.Class10.9

Groundsmaster

3280-D/3320

Page2–5

SpecicationsandMaintenance:TorqueSpecications

05138SLRevB

Toro 30403 Service Manual

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