Toro Groundsmaster 4100-D 30411 - Replacing the Blade Drive Belt

Note:Makesurethebeltispositionedonthespring
sideofthebeltguide(Figure63).
Figure63
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(Figure63).
3.Loosentheangenutsecuringthestopbolttothe
mountingtab.Backoffthenutenoughtoallowthe
idlerarmtopassbythestopbolt(Figure63).Move
theidlerpulleyawayfromthebelttoreleasebelt
tension.
Note:Ifthestopboltiseverremovedfromthe
mountingtab,makesureitisreinstalledinthehole
thatalignsthestopboltheadwiththeidlerarm.
4.Removetheboltssecuringthehydraulicmotorto
thecuttingunit(Figure64).Liftthemotoroffofthe
cuttingunitandlayitontopofthecuttingunit.
Figure64
1.Hydraulicmotor2.Mountingbolts
5.Removetheoldbeltfromaroundthespindlepulleys
andidlerpulley.
6.Routethenewbeltaroundthespindlepulleysand
idlerpulleyassembly.
7.Positionthehydraulicmotoronthecuttingunitafter
routingthebeltaroundthepulleys.Mountthemotor
tothecuttingunitwiththeboltspreviouslyremoved.
Note:Makesurethebeltispositionedonthespring
sideofthebeltguide(Figure63).
8.Reconnecttheextensionspring(Figure63)tothe
eyeboltandtensionthebeltasfollows:
•Whenproperlytensioned,theextension
spring(hooktohook)measurementshouldbe
approximately3.50±.25inch(inside).
•Oncethecorrectspringtensionisattained,
adjustthestopbolt(carriagebolt)untilthereis
approximately.125+.060/-.000inchclearance
betweentheheadoftheboltandtheidlerarm.
47