Toro 74312 - Cooling System Maintenance; Cleaning the Engine Screen and Engine Oil Cooler; Servicing the Engine-Oil Cooler; Cleaning the Engine Cooling Fins and Shrouds

4.Tightenthelocknutuntilthespringwashersare
atandthenbackoff1/4turntoproperlysetthe
pre-loadonthebearings(Figure44andFigure
45).
Important:Makesurethatthespring
washersareinstalledcorrectlyasshownin
Figure44andFigure45.
5.Installthedustcap.
g001297
Figure44
FrontCaster
1.Springwashers
3.Dustcap
2.Locknut
g006850
Figure45
RearCaster
1.Springwashers
CoolingSystem
Maintenance
CleaningtheEngineScreen
andEngineOilCooler
ServiceInterval:Beforeeachuseordaily
Removeanybuildupofgrass,dirt,orotherdebris
fromtheoilcooler.
Beforeeachuseremoveanybuildupofgrass,
dirt,orotherdebrisfromtheenginescreen.This
helpsensureadequatecoolingandcorrectengine
speedandreducesthepossibilityofoverheatingand
mechanicaldamagetotheengine.
ServicingtheEngine-Oil
Cooler
ServiceInterval:Every100hours
1.Movethespeed-controllevertotheNEUTRAL
positiontostopthemachine.
2.DisengagethePTO,engagetheparkingbrake,
shutofftheengine,andwaitforallmovingparts
tostop.
3.Removethefuel-tankmountingnutsandswing
outthefueltank.
4.Keeptheoilcoolerfreeofdebrisbycleaningthe
nswithabrush.
5.Swingthefueltankinandsecureitwiththe
mountingnuts.
6.Backthemountingnutsoff1/2turntoallowfor
tankexpansion.
CleaningtheEngine
CoolingFinsandShrouds
ServiceInterval:Every100hours/Yearly(whichever
comesrst)
1.Movethespeed-controllevertotheNEUTRAL
positiontostopthemachine.
2.DisengagethePTO,engagetheparkingbrake,
shutofftheengine,andwaitforallmovingparts
tostop.
3.Removetheair-intakescreenandfanhousing.
4.Cleanthedebrisandgrassfromtheengine
parts.
5.Installair-intakescreenandfanhousing.
44