Toro 30446 - Re-Tensioning the Blade Drive Belts; Replacing the Blade Drive Belt

Re-tensioningtheBladeDrive
Belts
ServiceInterval:Aftertherst10hours
Every50hours
Checktheconditionandtensionofthecuttingunitdrive
beltsinitiallyafter10hoursofoperationandevery50
operatinghoursthereafter.
Whenproperlytensioned,theextensionspring(hook
tohook)measurementshouldbeapproximately3.50
±.25inch(inside).Oncethecorrectspringtensionis
attained,adjustthestopbolt(carriagebolt)untilthereis
approximately.125+.060/-.000inchclearancebetween
theheadoftheboltandtheidlerarm(Figure70).
Note:Makesurethebeltispositionedonthespring
sideofthebeltguide(Figure70).
Figure70
1.Belt4.Beltguide
2.Eyebolt5.Flangenut
3.Extensionspring
6.Stopbolt
ReplacingtheBladeDriveBelt
ServiceInterval:Every800hours
Thebladedrivebelt,tensionedbythespringloaded
idlerpulley,isverydurable.However,aftermanyhours
ofuse,thebeltwillshowsignsofwear.Signsofaworn
beltare:squealingwhenbeltisrotating,bladesslipping
whencuttinggrass,frayededges,burnmarksandcracks.
Replacethebeltifanyoftheseconditionsareevident.
1.Lowerthecuttingunittotheshopoor.Remove
thebeltcoversfromthetopofthecuttingunitand
setthecoversaside.
2.Loosentheeyeboltallowingtheremovalofthe
extensionspring(Figure70).
3.Loosentheangenutsecuringthestopbolttothe
mountingtab.Backoffthenutenoughtoallowthe
idlerarmtopassbythestopbolt(Figure70).Move
theidlerpulleyawayfromthebelttoreleasebelt
tension.
Note:Ifthestopboltiseverremovedfromthe
mountingtab,makesureitisreinstalledinthehole
thatalignsthestopboltheadwiththeidlerarm.
4.Removetheboltssecuringthehydraulicmotorto
thecuttingunit(Figure71).Liftthemotoroffofthe
cuttingunitandlayitontopofthecuttingunit.
Figure71
1.Hydraulicmotor2.Mountingbolts
5.Removetheoldbeltfromaroundthespindlepulleys
andidlerpulley.
6.Routethenewbeltaroundthespindlepulleysand
idlerpulleyassembly.
7.Positionthehydraulicmotoronthecuttingunitafter
routingthebeltaroundthepulleys.Mountthemotor
tothecuttingunitwiththeboltspreviouslyremoved.
Note:Makesurethebeltispositionedonthespring
sideofthebeltguide(Figure70).
8.Reconnecttheextensionspring(Figure70)tothe
eyeboltandtensionthebeltasfollows:
•Whenproperlytensioned,theextension
spring(hooktohook)measurementshouldbe
approximately3.50±.25inch(inside).
•Oncethecorrectspringtensionisattained,
adjustthestopbolt(carriagebolt)untilthereis
approximately.125+.060/-.000inchclearance
betweentheheadoftheboltandtheidlerarm.
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