Toro POWER MAX HD - Page 17

SAEGrade8SteelSetScrews
RecommendedTorque
ThreadSize
SquareHeadHexSocket
1/4-20UNC
140±20in-lb.73±12in-lb.
5/16-18UNC
215±35in-lb.145±20in-lb.
1/2-13UNC75±15ft-lb.50±10ft-lb.
3/8-16UNC35±10ft-lb.18±3ft-lb.
WheelBoltsandLugNuts
ThreadSizeRecommendedTorque**
7/16-20UNFGrade565±10ft-lb.
88±14N-m
1/2-20UNFGrade580±10ft-lb.
108±14N-m
M12X1.25Class8.880±10ft-lb.
108±14Nm
M12X1.5Class8.880±10ft-lb.
108±14Nm
**Forsteelwheelsandnon-lubricatedfasteners.
ThreadCuttingScrews(ZincPlatedSteel)
Type1,Type23,orTypeF
ThreadSizeBaselineTorque*
No.6-32UNC
20±5in-lb.
No.8-32UNC
30±5in-lb.
No.10-24UNC
38±7in-lb.
1/4-20UNC
85±15in-lb.
5/16-18UNC
110±20in-lb.
3/8-16UNC
200±100in-lb.
*Holesize,materialstrength,materialthicknessandnishmustbeconsideredwhendetermining
specictorquevalues.Alltorquevaluesarebasedonnon-lubricatedfasteners.
ConversionFactors
in-lb.X11.2985=N-cm
ft-lb.X1.3558=N-m
N-cmX0.08851=in-lb.
N-cmX0.73776=ft-lb.
ThreadCuttingScrews(ZincPlatedSteel)
ThreadsperInch
ThreadsSize
TypeATypeB
BaselineTorque*
No.6182020±5in-lb.
No.8151830±5in-lb.
No.10121638±7in-lb.
No.12111485±15in-lb.
*Holesize,materialstrength,materialthicknessandnishmustbeconsideredwhendetermining
specictorquevalues.Alltorquevaluesarebasedonnon-lubricatedfasteners.
POWERMAX®HDServiceManual
Page2–7
SpecicationsandMaintenance:TorqueSpecications
3424-820RevA