Toro 74991 Z Master Professional 5000 Series - The engine loses power.; The engine overheats.; The machine does not drive.; The blades do not rotate.

Problem
PossibleCauseCorrectiveAction
1.Theengineloadisexcessive.1.Reducethegroundspeed.
2.Theaircleanerisdirty.
2.Cleantheair-cleanerelement.
3.Theoillevelinthecrankcaseislow.3.Addoiltothecrankcase.
4.Thecoolingnsandtheairpassages
abovetheengineareplugged.
4.Removetheobstructionfromthe
coolingnsandtheairpassages.
5.Theventholeinthefuelcapisplugged.5.Cleanorreplacethefuelcap.
6.Thereisdirtinthefuellter.6.Replacethefuellter.
Theenginelosespower.
7.Thereisdirt,water,orstalefuelinthe
fuelsystem.
7.ContactanAuthorizedServiceDealer.
1.Theengineloadisexcessive.1.Reducethegroundspeed.
2.Theoillevelinthecrankcaseislow.2.Addoiltothecrankcase.
Theengineoverheats.
3.Thecoolingnsandtheairpassages
abovetheengineareplugged.
3.Removetheobstructionfromthe
coolingnsandtheairpassages.
1.Thetrackingneedsadjustment1.Adjustthetracking.
Themowerpullsleftorright(withlevers
fullyforward).
2.Thetirepressureisnotcorrectinthe
drivetires.
2.Adjustthetirepressureinthedrive
tires.
1.Thebypassvalvesarenotclosedtight.1.Tightenthebypassvalves.
2.Thepumpbeltisworn,looseorbroken.
2.Changethebelt.
3.Thepumpbeltisoffapulley.3.Changethebelt.
4.Theidlerspringisbrokenormissing.4.Replacethespring.
Themachinedoesnotdrive.
5.Thehydraulic-uidlevelislowortoo
hot.
5.Addhydraulicuidtoreservoirsorletit
cooldown.
1.Thecuttingblade(s)is/arebentor
unbalanced.
1.Installnewcuttingblade(s).
2.Theblademountingboltisloose.2.Tightentheblademountingbolt.
3.Theenginemountingboltsareloose.3.Tightentheenginemountingbolts.
4.Theenginepulley,idlerpulley,orblade
pulleyisloose.
4.Tightentheappropriatepulley.
5.Theenginepulleyisdamaged.
5.ContactanAuthorizedServiceDealer.
6.Thebladespindleisbent.
6.ContactanAuthorizedServiceDealer.
Thereisabnormalvibration.
7.Themotormountislooseorworn.
7.ContactanAuthorizedServiceDealer.
1.Theblade(s)is/arenotsharp.1.Sharpentheblade(s).
2.Thecuttingblade(s)is/arebent.2.Installnewcuttingblade(s).
3.Themowerdeckisnotlevel.
3.Levelthemowerdeckfromside-to-side
andfront-to-rear.
4.Theundersideofmowerisdirty.4.Cleantheundersideofthemower.
5.Thetirepressureisnotcorrect.5.Adjustthetirepressure.
Themachineproducesanunevencutting
height.
6.Thebladespindleisbent.
6.ContactanAuthorizedServiceDealer.
1.Themowerdeckbeltisworn,loose,
orbroken.
1.Installanewdeckbelt.
2.Themowerdeckbeltisoffthepulley.
2.Installthemowerdeckpulleyand
checktheidlerpulley,idlerarm,and
springforcorrectpositionandfunction.
3.Thepumpdrivebeltisworn,loose,or
broken.
3.Checkthebelttensionorinstallanew
belt.
Thebladesdonotrotate.
4.Theidlerspringisbrokenormissing.4.Replacethespring.
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