Toro 74490 - Page 26

GeneralTroubleshooting(continued)
Problem
PossibleCauseCorrectiveAction
Theengineloadisexcessive.Reducethegroundspeed.
Theoillevelinthecrankcaseislow.Addoiltothecrankcase.
Theengineoverheats
Thecoolingnsandtheairpassages
abovetheengineareplugged.
Removetheobstructionandthoroughly
cleancoolingnsandtheairpassages.
Thetrackingneedsadjustment.Adjustthetracking.
Themowerpullstotheleftorright
(withleversfullyforward)
Thetirepressureinthedrivetiresis
notcorrect.
Adjustthetirepressureinthedrive
tires.
Thebypassvalvesarenotclosedtight.Tightenthebypassvalves.
Thepumpbeltisworn,looseorbroken.
Changethebelt.
Thepumpbeltisoffapulley.Changethebelt.
Theidlerspringisbrokenormissing.Replacethespring.
Themachinedoesnotdrive
Thehydraulicoillevelislowortoohot.Addhydraulicoiltothereservoirsorlet
itcooldown.
Thecuttingblade(s)is/arebentor
unbalanced.
Installnewcuttingblade(s).
Theblademountingboltisloose.Tightentheblademountingbolt.
Theenginemountingboltsareloose.Tightentheenginemountingbolts.
Theenginepulley,idlerpulley,orblade
pulleyisloose.
Tightentheappropriatepulley,check
tomakesureidlerspringsarenotover
stretched.
Theenginepulleyisdamaged.Replacetheenginepulley.
Thebladespindleisbent.Replacethespindle.
Themachinevibratesabnormally
Themotormountislooseorworn.
Checkthemountingbolts.
Theblade(s)is/arenotsharp.Sharpentheblade(s).
Thecuttingblade(s)is/arebent.Installnewcuttingblade(s).
Themowerdeckisnotlevel.
Levelthemowerdeckfromside-to-
sideandfront-to-rear.
Theundersideofmowerisdirty.Cleantheundersideofthemower.
Thetirepressureisnotcorrect.Adjustthetirepressure.
Themachineproducesanuneven
cuttingheight
Thebladespindleisbent.Replacethespindle.
Themowerdeckbeltisdamaged,
worn,loose,orbroken.
Installanewdeckbelt.
Themowerdeckbeltisoffthepulley.
Installthemowerbeltonthedeck
pulleyandchecktheidlerpulley,idler
arm,andspringforcorrectpositionand
function.
Thepumpdrivebeltisworn,looseor
broken.
Checkthebelttensionorinstallanew
belt.
Thebladesdonotrotate
Theidlerspringisbrokenormissing.Replacethespring.
Troubleshooting:GeneralTroubleshooting
Page3–4
2000SeriesZMASTER®ServiceManual
3438-778RevA