Toro 30447N - Replacing the Blade Drive Belt

Figure70
1.Belt4.Beltguide
2.Eyebolt5.Flangenut
3.Extensionspring
6.Stopbolt
ReplacingtheBladeDriveBelt
ServiceInterval:Every800hours
Thebladedrivebelt,tensionedbythespringloadedidler
pulley,isverydurable.However,aftermanyhoursofuse,
thebeltwillshowsignsofwear.Signsofawornbeltare:
squealingwhenbeltisrotating,bladesslippingwhencutting
grass,frayededges,burnmarksandcracks.Replacethebeltif
anyoftheseconditionsareevident.
1.Lowerthecuttingunittotheshopoor.Removethe
beltcoversfromthetopofthecuttingunitandsetthe
coversaside.
2.Loosentheeyeboltallowingtheremovalofthe
extensionspring(Figure70).
3.Loosentheangenutsecuringthestopbolttothe
mountingtab.Backoffthenutenoughtoallowthe
idlerarmtopassbythestopbolt(Figure70).Movethe
idlerpulleyawayfromthebelttoreleasebelttension.
Note:Ifthestopboltiseverremovedfromthe
mountingtab,makesureitisreinstalledintheholethat
alignsthestopboltheadwiththeidlerarm.
4.Removetheboltssecuringthehydraulicmotortothe
cuttingunit(Figure71).Liftthemotoroffofthe
cuttingunitandlayitontopofthecuttingunit.
Figure71
1.Hydraulicmotor2.Mountingbolts
5.Removetheoldbeltfromaroundthespindlepulleys
andidlerpulley.
6.Routethenewbeltaroundthespindlepulleysandidler
pulleyassembly.
7.Positionthehydraulicmotoronthecuttingunitafter
routingthebeltaroundthepulleys.Mountthemotor
tothecuttingunitwiththeboltspreviouslyremoved.
Note:Makesurethebeltispositionedonthespring
sideofthebeltguide(Figure70).
8.Reconnecttheextensionspring(Figure70)totheeye
boltandtensionthebeltasfollows:
•Whenproperlytensioned,theextension
spring(hooktohook)measurementshouldbe
approximately3.50±.25inch(inside).
•Oncethecorrectspringtensionisattained,
adjustthestopbolt(carriagebolt)untilthereis
approximately.125+.060/-.000inchclearance
betweentheheadoftheboltandtheidlerarm.
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