Toro Power Clear 721 - Maintenance; Maintenance Schedule and Safety; Control Cable and Rotor Blade Inspection

StandardTorqueforDry,ZincPlated,andSteelFasteners(MetricSeries)
Class8.8Bolts,Screws,StudswithRegular
HeightNuts(Class8orStrongerNuts)
Class10.9Bolts,Screws,StudswithRegular
HeightNuts(Class10orstrongerNuts)
ThreadSize
in-lbN•cmin-lbN•cm
M5X0.857±6644±6878±8881±90
M6X1.096±101085±113133±141503±158
ft-lb
N•m
ft-lb
N•m
M8X1.2519±226±328±338±4
M10X1.538±452±554±673±8
M12X1.7566±790±1093±10126±14
M16X2.0166±17255±23229±23310±31
M20X2.5325±33440±45450±46610±62
Note:Reducetorquevalueslistedinthetableaboveby25%forlubricatedfasteners.Lubricated
fastenersaredenedasthreadscoatedwithalubricantsuchasoil,graphite,orthreadsealantsuch
asLoctite.
Torquevaluesmayhavetobereducedwheninstallingfastenersintothreadedaluminumorbrass.The
specictorquevalueshouldbedeterminedbasedonthefastenersize,thealuminumorbasematerial
strength,lengthofthreadengagement,etc.
Thenominaltorquevalueslistedabovearebasedon75%oftheminimumproofloadspeciedinSAE
J1199.Thetoleranceisapproximately±10%ofthenominaltorquevalue.Thinheightnutsincludejam
nuts.
SpecicationsandMaintenance:TorqueSpecications
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POWERCLEAR®721/821SnowthrowerServiceManual
3438-776RevA