Toro 74444 - The Safety Interlock System

Figure16
1.PTO-On2.PTO-Off
DisengagingthePTO
Todisengage,pushthePTOswitchtotheoffposition
(Figure16).
TheSafetyInterlockSystem
Ifsafetyinterlockswitchesaredisconnected
ordamagedthemachinecouldoperate
unexpectedlycausingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlock
switchesdailyandreplaceanydamaged
switchesbeforeoperatingthemachine.
UnderstandingtheSafetyInterlock
System
Thesafetyinterlocksystemisdesignedtopreventthe
enginefromstartingunless:
•Theparkingbrakeisengaged.
•Thepowertakeoff(PTO)isdisengaged.
•Themotioncontrolleversareintheneutrallocked
position
Thesafetyinterlocksystemalsoisdesignedtostopthe
enginewhenthetractioncontrolsaremovedfromthe
lockedpositionwiththeparkingbrakeengagedorif
yourisefromtheseatwhenthePTOisengaged.
Thehourmeterhassymbolstonotifytheuserwhenthe
interlockcomponentisinthecorrectposition.When
thecomponentisinthecorrectposition,atrianglewill
lightupinthecorrespondingsquare.
Figure17
1.Triangleslightupwhentheinterlockcomponentsareinthe
correctposition
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.
4.Sittingontheseat,engagetheparkingbrake,move
thePTOswitchtooffandmovethemotioncontrol
leverstoneutrallockposition.Nowstarttheengine.
Whiletheengineisrunning,centereithermotion
controlandmove(forwardorreverse);theengine
shouldstop.Repeatforothermotioncontrol.
5.Sittingontheseat,disengagetheparkingbrake,
movethePTOswitchtooffandmovethemotion
controlleverstoneutrallockposition.Trystarting
theengine;theengineshouldnotcrank.
DrivingForwardorBackward
Thethrottlecontrolregulatestheenginespeedas
measuredinRPM(revolutionsperminute).Place
thethrottlecontrolinthefastpositionforbest
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