Toro Groundsmaster 4100 - Replacing the Blade-Drive Belt

ReplacingtheBlade-Drive
Belt
ServiceInterval:Every800hours
Theblade-drivebelt,tensionedbythespring-loaded
idlerpulley,isverydurable.However,aftermany
hoursofuse,thebeltwillshowsignsofwear.Signsof
awornbeltare:squealingwhenthebeltisrotating,
bladesslippingwhencuttinggrass,frayededges,
burnmarks,andcracks.Replacethebeltifanyof
theseconditionsareevident.
1.Lowerthemowerdecktotheshopoor,remove
thebeltcoversfromthetopofthemowerdeck,
andsetthecoversaside.
2.Loosentheeyebolt(Figure114).
3.Loosentheangenutsecuringthestopboltto
themountingtabandmovetheidlerpulleyaway
fromthebelt(Figure114).
Note:Loosenthenutenoughtoallowtheidler
armtopassthestopbolt.
Note:Ifyoumustremovethestopboltfromthe
mountingtab,installitintheholethatalignsthe
stop-boltheadwiththeidlerarm.
4.Removetheboltssecuringthehydraulicmotor
tothemowerdeck(Figure115).
g011511
Figure115
1.Hydraulicmotor2.Mountingbolts
5.Liftthemotoroffthemowerdeckandlayiton
topofthemowerdeck.
6.Removetheoldbeltfromaroundthespindle
pulleysandidlerpulley.
7.Routethenewbeltaroundthespindlepulleys
andidler-pulleyassembly.
8.Positionthehydraulicmotoronthemowerdeck
afterroutingthebeltaroundthepulleys.Mount
themotortothemowerdeckwiththebolts
previouslyremoved.
Note:Ensurethatthebeltispositionedonthe
springsideofthebeltguide(Figure114).
9.Connecttheextensionspring(Figure114)tothe
eyeboltandtensionthebeltasfollows:
•Whenproperlytensioned,theinside
measurementoftheextensionspring(hook
tohook)shouldbeapproximately8.3to9.5
cm(3-1/4to3-3/4inch).
•Whenyouattainthecorrectspringtension,
adjustthestopbolt(carriagebolt)untilthere
isapproximately2to5mm(0.065to0.185
inches)clearancebetweentheheadofthe
boltandtheidlerarm.
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