Toro Groundsmaster 4010 - Belt Maintenance; Servicing the Alternator Belt; Servicing the Compressor Belt; Tensioning the Blade-Drive Belts

BeltMaintenance
ServicingtheAlternator
Belt
ServiceInterval:Aftertherst10hours
Every100hours
Propertensionofthebeltallows10mm(3/8inch)of
deectionwhenaforceof44N∙m(10ft-lb)isapplied
onthebeltmidwaybetweenthepulleys.
Ifthedeectionisnot10mm(3/8inch),loosenthe
alternator-mountingbolts(Figure100).
Note:Increaseordecreasethealternator-belt
tensionandtightenthebolts.Checkthedeectionof
thebeltagaintoensurethatthetensioniscorrect.
g020460
Figure100
1.Alternator
3.Compressor
2.Mountingbolt4.Idlerpulley
ServicingtheCompressor
Belt
ServiceInterval:Aftertherst10hours
Every100hours
1.Propertensionofthebeltallows10mm(3/8
inch)ofdeectionwhenaforceof44N∙m(10
ft-lb)isappliedonthebeltmidwaybetweenthe
pulleys.
2.Ifthedeectionisnot10mm(3/8inch),loosen
theidlerpulleymountingbolt(Figure100).
Note:Increaseordecreasethecompressor-belt
tensionandtightenthebolt.Checkthedeection
ofthebeltagaintoensurethatthetensionis
correct.
TensioningtheBlade-Drive
Belts
ServiceInterval:Aftertherst10hours
Every50hours
Whenproperlytensioned,theinsidemeasurement
oftheextensionspring(hooktohook)shouldbe
approximately8.3to9.5cm(3-1/4to3-3/4inches).
Oncethecorrectspringtensionisattained,adjustthe
stopbolt(carriagebolt)untilthereisapproximately2
to5mm(0.065to0.185inch)clearancebetweenthe
headoftheboltandtheidlerarm(Figure101).
Note:Ensurethatthebeltispositionedonthespring
sideofthebeltguide(Figure101).
g004717
Figure101
1.Belt4.Beltguide
2.Eyebolt5.Flangenut
3.Extensionspring
6.Stopbolt
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.Loosentheeyeboltallowingtheremovalofthe
extensionspring(Figure101).
3.Loosentheangenutsecuringthestopboltto
themountingtabandmovetheidlerpulleyaway
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