Toro 74418 - The Safety Interlock System; Testing the Safety Interlock System

toremovethekeyasthefuelpumpmayrun
andcausethebatterytolosecharge.
Childrenorbystandersmaybeinjuredifthey
moveorattempttooperatethetractorwhileit
isunattended.
Alwaysremovetheignitionkeyandsetthe
parkingbrakewhenleavingthemachine
unattended,evenifjustforafewminutes.
OperatingthePowerTakeOff
(PTO)
Thepowertakeoff(PTO)switchstartsandstopsthe
mowerbladesandanypoweredattachments.
EngagingthePTO
1.Iftheengineiscold,allowtheenginetowarmup5
to10minutesbeforeengagingthePTO.
2.Whileseatedintheseat,releasethepressureonthe
tractioncontrolleversandplaceinneutral.
3.Placethethrottleinthefastposition.
Note:EngagingthePTOwiththethrottleatthe
halforlesspositionwillcauseexcessiveweartothe
drivebelts.
4.Pulloutonthepowertakeoff(PTO)switchto
engageit(Figure17).
Figure17
1.PTO-On2.PTO-Off
DisengagingthePTO
Todisengage,pushthePTOswitchtotheoffposition
(Figure17).
TheSafetyInterlockSystem
Ifsafetyinterlockswitchesaredisconnected
ordamagedthemachinecouldoperate
unexpectedlycausingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlock
switchesdailyandreplaceanydamaged
switchesbeforeoperatingthemachine.
UnderstandingtheSafetyInterlock
System
Thesafetyinterlocksystemisdesignedtopreventthe
enginefromstartingunless:
•Youaresittingontheseat.
•Theparkingbrakeisengaged.
•Thepowertakeoff(PTO)isdisengaged.
•Themotioncontrolleversareintheneutrallocked
position
Thesafetyinterlocksystemalsoisdesignedtostopthe
enginewhenthetractioncontrolsaremovedfromthe
lockedpositionwiththeparkingbrakeengagedorif
yourisefromtheseatwhenthePTOisengaged.
TestingtheSafetyInterlockSystem
ServiceInterval:Beforeeachuseordaily
Testthesafetyinterlocksystembeforeyouusethe
machineeachtime.Ifthesafetysystemdoesnot
operateasdescribedbelow,haveanAuthorizedService
Dealerrepairthesafetysystemimmediately.
1.Sittingontheseat,engagetheparkingbrakeand
movethePTOtoon.Trystartingtheengine;the
engineshouldnotcrank.
2.Sittingontheseat,engagetheparkingbrakeand
movethePTOtooff.Moveeithermotioncontrol
lever(outofneutrallockedposition).Trystarting
theengine;theengineshouldnotcrank.Repeatfor
othercontrollever.
3.Sittingontheseat,engagetheparkingbrake,
movethePTOswitchtooffandmovethemotion
controlleverstoneutrallockposition.Nowstart
theengine.Whiletheengineisrunning,release
theparkingbrake,engagethePTOandriseslightly
fromtheseat;theengineshouldstop.
17